Table of Contents
  1. Intro
  2. Design
    1. Style
    2. Comfort
    3. Controls
    4. Stability
    5. Portability
    6. Case
    7. Build Quality
    8. Cable
    9. Front
    10. Angled
    11. Side
    12. Rear
    13. Top
  3. Sound
    1. Bass
    2. Mid
    3. Treble
    4. Soundstage
    5. Imaging
    6. Total Harmonic Distortion
  4. Isolation
    1. Noise Isolation
    2. Leakage
  5. Active Features
    1. Wireless
    2. Battery
    3. App Support
  6. In the box
  7. Conclusion
  8. Q&A
Reviewed on Apr 22, 2016 , Marc Henney

BÖHM B-66
HEADPHONES REVIEW

Usage Ratings
6.7Mixed Usage
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What it is This is the combination of the different use cases to evaluate how versatile the headphones are. Therefore an everyday headphone should be well-rounded enough to adapt to most situations and environments without significant losses in sound quality, design ergonomics or isolation.
Score components:
6.6Critical Listening
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What it is The level of audio fidelity a headphone can reproduce. Therefore a balanced and true representation of bass, mids, treble, soundstage and imaging, as well as a comfortable listening experience, is essential for critical listening.
Score components:
6.4Commute/Travel
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What it is How well the headphones handle the loud environments involved in commuting or traveling. Therefore your listening experience should be comfortable, hassle-free and as isolated from noise as possible.
Score components:
6.9Sports/Fitness
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What it is How well-adapted the headphones are, to use while doing sports or strenuous exercise. Therefore the headphones should not be too cumbersome and deliver a stable and comfortable listening experience.
Score components:
6.9Office
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What it is How well the headphones can deliver a comfortable and isolated listening experience in an office-like environment. They should not leak much and should block the noise of a busy office.
Score components:
Type : On-ear
Enclosure : Closed-Back
Wireless : Yes
Noise-Cancelling : Yes
Mic : Yes
Transducer : Dynamic

The Bohm B-66 are above-average wireless Bluetooth headphones that sound great and won't disturb the people around you at high volumes. They're stable enough to not slip off your head easily but feel too tight, which can get uncomfortable. They also poorly isolate listeners from ambient noise in loud environments.

Test Results
Design 6.3
Sound 6.7
Isolation 6.8
Active Features 6.0
Pros
  • Great audio reproduction.
  • Minimal leakage.
  • Stable fit.
Cons
  • Uncomfortable clamping pressure.
  • Poor noise isolation.

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6.3

Design

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Score components:
BÖHM B-66 Design Picture

The Bohm wireless headphones look great and are surprisingly stable for an on-ear design. They have an efficient control scheme with strong tactile feedback. The ear cups and headband feel sufficiently sturdy to handle a few drops without damage. Unfortunately, they are not comfortable. The small ear cups apply too much pressure on the ears, which can cause soreness and fatigue, especially during long listening sessions.

Style
BÖHM B-66 Design Picture 2

The Bohm Wireless Bluetooth are sleek looking headphones. They have a two-tone black and silver color scheme that looks great feels modern. This, combined with their wireless design, gives them a minimalist aesthetic that's visually appealing. They are also offered in a different color scheme.

5.5 Comfort
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What it is: Adjustability and degrees of freedom, pressure, stiffness and weight.
When it matters: When the headphones are going to be used for long durations.
Score components: Subjectively assigned
BÖHM B-66 Comfort Picture
Weight : 0.37 lbs
Clamping Force
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What it is: The force that the headphones exert on your head, once you have them on. This is purely a measurement of the force applied, which does not take into account the earpad's surface area and the resulting pressure you will feel, on or around your ears.
When it matters: The tighter the headphones, the more force they put on your head. This can get uncomfortable or cause pain and soreness during long listening sessions.
:
1.05 lbs

The Bohm B-66 wireless headphones feel too tight on the head. They are moderately well-padded and the ear cups, although small rest well on the ears. Unfortunately, to maintain a stable fit the headband exert an uncomfortable amount of tension on the head. This makes the headphones hard to use for long listening sessions as the pressure can cause soreness and physical fatigue.

7.0 Controls
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What it is: The control scheme of the headphones; the number of functions provided, button layout and ergonomics as well as the quality of tactile feedback.
When it matters: If you want to control volume, pause your music or make phone calls without directly interacting with, your audio device.
Score components: Subjectively assigned
BÖHM B-66 Controls Picture
Call/Music Control : Yes
Volume Control : Yes
Additional Buttons : Noise-Cancelling

Button layout and functionality is above-average. These headphones provide call/music, track-skipping, and volume controls. The buttons have excellent tactile feedback, but the overlapping functions for volume and track-skipping controls might take some time to get used to.

7.5 Stability
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What it is: How the headphones are designed to prevent them from slipping off your ears or falling off your head.
When it matters: If you plan on using the headphones while doing sports or other physical activities that requires a lot of movement.
Score components: Subjectively assigned
BÖHM B-66 Stability Picture

The Bohm Bluetooth headphones are surprisingly stable on the head. The clamping tightness that may be uncomfortable for some prevents these headphones from slipping off the ears even while running. They're not designed for sports so during high-intensity activities they will move slightly, but they easily maintain their position during casual listening sessions.

6.4 Portability
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What it is: The volume of space occupied by the headphones when folded into their most compact format.
When it matters: If you're often on the move and need to carry your headphones in a bag, purse , or pocket.
Score components:
BÖHM B-66 Portability Picture
L : 7.09 "
W : 6.69 "
H : 1.38 "
Volume : 65.41 Cu. Inches

The Bohm B-66 are mid-sized on-ear headphones that do not take up much space in a backpack or handbag. Unfortunately, they do not fold up into a compact format, which means they won't fit in a pocket, even large jacket pockets.

8.0 Case
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What it is: The provided carrying options to protect your headphones when transporting them.
When it matters: To prevent damaging your headphones, if you often carry them in your bag or pocket.
Score components: Subjectively assigned
BÖHM B-66 Case Picture
Type : Hard case
L : 8.66 "
W : 8.66 "
H : 1.57 "
Volume : 118.11 Cu. Inches

These headphones come with a sturdy hard case that will protect them from scratches and from falls. However, it does add a little bit of volume to the headphones.

6.0 Build Quality
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What it is: Durability; material quality; cheap/expensive feel.
When it matters: When the headphones are going to be used by multiple users (classes/studios), by children, in tough conditions, on a daily basis, or for exercise.
Score components: Subjectively assigned
BÖHM B-66 Build Quality Picture

Build quality is average at best. The Bohm wireless Bluetooth headphones are sturdy enough to handle a few drops without being damaged. Unfortunately, their lightweight design doesn't feel as durable as some other headphones and the swivel mechanism feels loose and susceptible to breaking under physical stress.

Cable
BÖHM B-66 Cable Picture
Detachable : Yes
Length : 4.23 ft
Connection : 1/8" TRRS

Comes with; a 1/8" TRRS-TRRS audio cable with a play/music button and a USB charging cable.

Front
Angled
Side
Rear
Top
6.7

Sound

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What it is: How accurately the audio is reproduced. The tests are performed with the headphones' most commonly used features enabled (noise-cancelling, wireless, etc.)
Score components:
BÖHM B-66 Frequency Response

The Bohm B-66 have great audio reproduction and no noticeable harmonic distortion. Bass is nice and punchy and doesn't overpower instruments and vocals. They sound balanced with most tracks they reproduce but the higher frequencies are a little inconsistent, slightly reducing the clarity of lead instruments, like guitars.

9.0 Bass
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What it is: Frequency Response from 20Hz-250Hz
When it matters: When the material is heavy on bass frequencies, such as those of kick drums and bass guitar.
Score components:
BÖHM B-66 Bass
Std. Err.
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What it is: The amount of deviation (weighted standard error) in bass frequency response (20Hz-250Hz) as compared to a target response that would sound perfectly balanced to most people.
When it matters: When a balanced and neutral (reference) bass performance is desired.
Good value: <4dB
Noticeable difference: 0.1dB
:
1.92 dB
Low-Frequency Extension
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What it is: The lowest frequency at which the frequency response reaches -3dB of the target response.
When it matters: Shows how extended the bass is.
Good value: <40Hz
Noticeable difference: 5Hz
:
16.58 Hz
Low-Bass
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What it is: The average amount of over/under-emphasis in frequency response from 20Hz-60Hz.
When it matters: Kick drums and low frequency effects get their 'thump' from this range. Mostly felt than heard.
Good value: +/-3dB
Noticeable difference: 0.1dB
:
1.39 dB
Bass
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What it is: The average amount of over/under-emphasis in frequency response from 60Hz-120Hz.
When it matters: Melodic bass instruments have most of their fundamental frequencies in this range. This is where the 'body' and 'punch' of the bass sits.
Good value: +/-3dB
Noticeable difference: 0.1dB
:
1.33 dB
High-Bass
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What it is: The average amount of over/under-emphasis in frequency response from 120Hz-250Hz.
When it matters: Most instruments get their warmth and full-ness from this range. When over-emphasized, mixes tend to get muddy and boomy.
Good value: +/-3dB
Noticeable difference: 0.1dB
:
3.03 dB

Excellent performance. The only remark is the subtle bump in high-bass, which could muddy up the sound very slightly.

8.2 Mid
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What it is: Frequency Response from 250Hz-2KHz
When it matters: When the material is heavy on mid-range frequencies. This is the case for the majority of audio content.
Score components:
BÖHM B-66 Mid
Std. Err.
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What it is: The amount of deviation (weighted standard error) in mid frequency response (250Hz-2.5KHz) as compared to a target response that would sound perfectly balanced to most people.
When it matters: When a balanced and neutral (reference) mid performance is desired.
Good value: <4dB
Noticeable difference: 0.1dB
:
2.4 dB
Low-Mid
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What it is: The average amount of over/under-emphasis in frequency response from 250Hz-500Hz.
When it matters: Most instruments have their fundamentals or low harmonics in this range. Over-emphasis in this range sounds boxy. Under-emphasis, thins out the vocals and lead instruments.
Good value: +/-3dB
Noticeable difference: 0.1dB
:
2.34 dB
Mid
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What it is: The average amount of over/under-emphasis in frequency response from 500Hz-1KHz.
When it matters: This range is occupied mostly by upper harmonics. Over-emphasis sounds forward and honky. Under-emphasis pushes instruments to the back of the mix.
Good value: +/-3dB
Noticeable difference: 0.1dB
:
0.06 dB
High-Mid
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What it is: The average amount of over/under-emphasis in frequency response from 1KHz-2.5KHz.
When it matters: Most instruments, especially vocals, get their intensity and clarity from this range. Over-emphasis sounds harsh, under-emphasis sounds weak and distant.
Good value: +/-3dB
Noticeable difference: 0.1dB
:
2.95 dB

Very good performance. The bump in low-mid is the continuation of overemphasis in high-bass, making the sound slightly boxy. The bump in high-mid pushes the vocals/leads forward, but the effect is very subtle.

4.2 Treble
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What it is: Frequency Response from 2KHz-20KHz
When it matters: When the material is heavy on high-range frequencies, such as voice, cymbals, and any other material where brightness, brilliance and airiness is desired.
Score components:
BÖHM B-66 Treble
Std. Err.
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What it is: The amount of deviation (weighted standard error) in treble frequency response (2.5KHz-20KHz) as compared to a target response that would sound perfectly balanced to most people.
When it matters: When a balanced and neutral (reference) treble performance is desired.
Good value: <4dB
Noticeable difference: 0.1dB
:
7.64 dB
Low-Treble
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What it is: The average amount of over/under-emphasis in frequency response from 2.5KHz-5KHz.
When it matters: Almost all instruments rely on this range for their presence, detail, and articulation. Over-emphasis can sound harsh and painful. Under-emphasis hurts the comprehensibility of vocals and lead instruments.
Good value: +/-3dB
Noticeable difference: 0.1dB
:
-1.61 dB
Treble
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What it is: The average amount of over/under emphasis in frequency response from 5KHz-10KHz.
When it matters: This is the sibilance range. Cymbals, vocals, and lead instruments rely on this range for brightness and presence. Over-emphasis sounds piercing and painful, under-emphasis sounds dull and lispy.
Good value: +/-3dB
Noticeable difference: 0.1dB
:
0.2 dB
High-Treble
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What it is: The average amount of over/under-emphasis in frequency response from 10KHz-20KHz.
When it matters: This range gives brilliance and airiness to the sound. Over-emphasis sounds hissy, under-emphasis sounds closed-up and lifeless.
Good value: +/-3dB
Noticeable difference: 0.1dB
:
-10.74 dB

Average performance. The overall response is rather inconsistent. The 5KHz dip negatively affects the clarity and intelligibility of leads/vocals. The under-emphasis in high-treble can make the sound slightly closed-up.

4.5 Soundstage
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What it is: Soundstage qualities are not inherent to the audio content, the headphones have to 'create' them rather than 'reproduce' them. They determine whether the sound is perceived to be coming from inside or in front of the head, how open and spacious the soundstage is, how much the headphones acoustically interact with the environment, and how strong the phantom center is.
When it matters: When an accurately produced, large and spacious soundstage, similar to that of a stereo loudspeaker setup is desired.
PRTF Error
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What it is: The average amount of deviation in Pinna-Related Transfer Function of the headphones, compared to that of a loudspeaker. Whether the soundstage is perceived to be unnatural, located inside or in front of the head, is dependent on this quality. The more the headphones activate the HRTF resonances of the ear (similar to what loudspeakers do), the more the soundstage will be pulled out from inside the listener's head. This quality affects both stereo and mono content.
When it matters: When a natural, in-the-front soundstage is desired, similar to that of a loudspeaker.
Good value: <5
Noticeable difference: 0.5
:
6.98 dB
Openness
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What it is: How open the headphones are, and how open and spacious they sound. This quality affects both stereo and mono content. This test differentiates between acoustically and electronically produced crosstalk and only takes the acoustically generated crosstalk into account. This value is the inverse of the Noise Isolation test score.
When it matters: When an open, wide and roomy sound is desired. A value of 10 indicates a fully open headphone, and a value of 0 indicates a fully closed headphone.
Good value: >7.5
Noticeable difference: 0.5
:
3.9
Acoustic Space Excitation
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What it is: How loud the headphones are, and how much they excite their environment acoustically. If the headphones are loud and open enough, the sound leaking from the headphones takes some of the characteristic of its environment (reflections/reverb) before reflecting back into the open headphones and to the listener's ears. This quality affects both stereo and mono content. This value is the inverse of the Leakage test score.
When it matters: When an open, wide and roomy sound is desired.
Good value: >7.5
Noticeable difference: 0.5
:
1.7
Correlated Crosstalk
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What it is: How strong and solid the phantom center is. This is mostly a stereo quality and its effects on mono content are minimal. This test is sensitive to the phase of the crosstalk and whether it is produced acoustically or electronically.
When it matters: When a true reproduction of the stereo image is desired. A value of 0 indicates no crosstalk, or that the existing crosstalk is not correlated enough to affect the phantom center. A negative score means the crosstalk is out of phase with the original signal, resulting in a slightly wider stereo image at the expense of creating a 'hole' at the center of the stereo field. A positive score means the crosstalk is in phase and positively affecting the phantom center.
Good value: >1dB
Noticeable difference: 0.3dB
:
0.01 dB

5.2 Imaging
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What it is: Imaging qualities are inherent to the audio content, the headphones have to 'reproduce' them rather than 'create' them. They determine how accurately the objects are positioned in the stereo image, and how transparent the imaging is.
When it matters: When accurate positioning of the objects in the stereo image, and clear and transparent imaging is desired.
BÖHM B-66 Phase Response
Phase Error
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What it is: The average amount of deviation in the phase, from the ideal flat response.
When it matters: When an accurate and transparent imaging is desired.
Good value: <60°
Noticeable difference: 10°
:
255.01 °
Driver Mismatch (Amplitude)
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What it is: The Left/Right balance of our test unit, that is, the amount of amplitude difference between the left and right drivers. This is not a design test, but a marker for manufacturing tolerance and ergonomics.
When it matters: When a properly balanced stereo image and low manufacturing tolerance is desired. A poor score indicates a noticeable difference in level between the left and right drivers.
Good value: <0.3dB
Noticeable difference: 0.1dB
:
0.6 dB
Driver Mismatch (Frequency)
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What it is: The amount of difference (Std. Err.) between the frequency response of the left and right drivers of our test unit. This is not a design test, but a marker for manufacturing tolerance and ergonomics.
When it matters: When an even and stable stereo image, as well as a low manufacturing tolerance, is desired. A poor score indicates there may be 'holes' in the stereo image at certain frequencies.
Good value: <2dB
Noticeable difference: 0.1dB
:
3.59 dB
Driver Mismatch (Phase)
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What it is: The amount of difference (Std. Err.) between the phase response of the left and right drivers of our test unit. This is not a design test, but a marker for manufacturing tolerance and ergonomics.
When it matters: When an even and stable stereo image, as well as a low manufacturing tolerance, is desired. A poor score indicates there may be inaccuracies in the stereo image reproduction at certain frequencies.
Good value: <90°
Noticeable difference: 30°
:
49.8 °
9.5 Total Harmonic Distortion
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What it is: The subtle, unwanted frequencies (harmonics) produced alongside the intended frequencies.
When it matters: When clean and pure sound reproduction is desired, though its effect is not as noticable as frequency response.
Score components:
BÖHM B-66 Distortion
Weighted THD @ 90
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What it is: The overall amount of harmonic distortion measured at 90dB SPL. To make the score more perceptually relevant, more weight is given to the higher frequencies.
When it matters: How pure the sound is at moderate listening levels.
Good value: <0.100
Noticeable difference: 0.1
:
0.032
Weighted THD @ 100
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What it is: The overall amount of harmonic distortion measured at 100dB SPL. To make the score more perceptually relevant, more weight is given to the higher frequencies.
When it matters: How pure the sound is at loud listening levels.
Good value: <0.300
Noticeable difference: 0.1
:
0.146

Good performance. The amount of harmonic distortion at 90dB SPL is very good, especially in the bass region. The general rise at 100dB SPL remains within good limits.

6.8

Isolation

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Score components:

The Bohm B-66 poorly isolate listeners in noisy environments. The small ear cups provide a decent amount of passive isolation but not enough to prevent ambient noise from seeping into your audio. Unfortunately, the active noise cancelling is weak and will not be sufficient for loud environments like in a plane or train.

6.1 Noise Isolation
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What it is: How much outside noise is blocked out by putting the headphones on.
When it matters: If the headphones are going to be used in a noisy envinronment (airplane, subway, etc.)
Score components:
BÖHM B-66 Noise Isolation
Overall Attenuation
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What it is: The overall amount of environmental noise reduction in dB.
When it matters: In loud envinronments like planes, trains, offices, etc.
Good value: <-20dB
Noticeable difference: 1dB
:
-16.45 dB
Bass
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What it is: The overall amount of noise isolation in the bass range (20Hz-250Hz).
When it matters: When the outside noise is bass-heavy, like in airplanes.
Good value: <-15dB
Noticeable difference: 1dB
:
-8.04 dB
Mid
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What it is: The overall amount of noise isolation in the mid-range (250Hz-2.5KHz).
When it matters: When the environment's noise is mid-heavy, like in an office.
Good value: <-15dB
Noticeable difference: 1dB
:
-9.02 dB
Treble
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What it is: The overall amount of noise isolation in the treble range (2.5KHz-20KHz).
When it matters: When the environment's noise is treble-heavy. Although uncommon, areas with sharp sounds fall under this category.
Good value: <-30dB
Noticeable difference: 1dB
:
-34.52 dB
Self-Noise
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What it is: The amount of noise created by the active electronics of the headphones (if applicable), measured from 200Hz-20KHz. Applies mostly to wireless and noise-cancelling headphones.
When it matters: If too loud, it could become distracting when listening to quiet material like podcasts and audiobooks.
Good value: <18dB
Noticeable difference: 1dB
:
16.87 dB

Poor isolation. The passive isolation provided by the ear cups does a good job in the treble range. However, the effectiveness diminishes as the frequency lowers. The active isolation provides a maximum of 10dB of cancellation in the bass range, which is below average and does not do much in the mid and treble ranges.

8.3 Leakage
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What it is: The amount of sound bleeding out of the headphones.
When it matters: When the listener doesn't want people around them (in office, recording studio, etc.) to hear what is being listened to.
Score components:
BÖHM B-66 Leakage
Overall Leakage @ 1ft
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What it is: The amount of sound leakage heard 1 foot away from the user, while the user is listening to a 100dB SPL signal.
When it matters: When you don't want people hear what you are listening to.
Good value: <35dB
Noticeable difference: 1dB
:
33.42 dB

Very good leakage. The majority of leakage is in the treble range and the overall level is low. Listening to these headphones at loud volumes shouldn't be an issue in most situations.

6.0

Active Features

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What it is: Headphones with active components that require a battery. This includes noise cancelling and wireless headphones that actively reduce noise or transmit audio via a wireless connection.
When it matters: How suitable the power and wireless specifications of an active headphone will be, depending on your listening habits. The range and/or discharge time of the active headphone you select will be important if you're often on the move or have long uninterrupted listening sessions.
Score components:

The Bohm B-66 have a good wireless range and relatively low latency considering they don't support aptX or aptX(LL). Unfortunately, they have a poor battery performance. They take exceedingly long to charge and only last about 10 hours of continuous playback. This would be a decent battery life if they had power saving features and didn't take so long to charge but unfortunately they won't be the best headphones to take on the road for on a long weekend without access to a power source.

7.8 Wireless
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What it is: Headphones that offer a cable-free listening experience over a wireless network, typically via Bluetooth or radio frequency.
When it matters: If you don't want to be limited by the length of an audio cable. This means having the freedom to move around in your home or office with a much greater range than an audio cable could provide, especially, if the Bluetooth source is heavy or difficult to carry.
Type
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What it is: The type and version of the wireless network, the headphones use to connect to the audio source. This could either be Bluetooth or radio frequency.
When it matters: The Bluetooth version will determine how compatible the headphones are with your Bluetooth enabled devices. Typically, newer Bluetooth versions are backward compatible with older ones but may lack the additional features that more recent Bluetooth protocols provide.
:
Bluetooth 4.0
SBC Latency
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What it is: The latency for the default sub-band coding of most Bluetooth headphones.
When it matters: When watching videos a high latency can cause sync issues between the images you see and the audio you hear.
Good value: 170ms or less
Noticeable difference: 15ms
:
122 ms
aptX Latency
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What it is: An audio coding algorithm (Codec) that improves bit rate efficiency. It reduces latency and improves sound quality over Bluetooth.
When it matters: For better sound quality if your often streaming music over Bluetooth. Also it slightly improves latency when watching videos with wireless headphones.
Good value: 130ms or less
Noticeable difference: 15ms
:
N/A
aptX(LL) Latency
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What it is: Low latency variation of aptX that significantly reduces sync issues between video and sound when using Bluetooth headphones.
When it matters: When watching videos or gaming latency is a lot more noticeable than just listening to music.
Good value: 50ms or less
Noticeable difference: 5ms
:
N/A
Obstructed Range
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What it is: The range that the wireless headphones can reach before dropping any audio when the Bluetooth source was placed in another room.
When it matters: If you can't or prefer not to carry your Bluetooth source on you, while listening to your audio in an indoor environment. Although, the obstructed wireless range will slightly depend on your home or office layout.
Good value: >35ft
Noticeable difference: 5ft
:
41 ft
Line of Sight Range
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What it is: The range that the wireless headphones can reach before dropping any audio when in direct line of sight of the Bluetooth device.
When it matters: If you can't or prefer not to carry your Bluetooth source on you, while listening to your audio in a large and open environment.
Good value: 170ft or more
Noticeable difference: 10ft
:
177 ft
NFC
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What it is: Near Field Communication technology that allows you to quickly, pair your headphones with your Bluetooth and NFC-enabled device.
When it matters: This makes pairing with an NFC-enabled device a lot easier than the typical and often tedious hold-to-pair procedure that most wireless headphones have.
:
No

The Bohm B-66 like the Diskin wireless Bluetooth, have an excellent wireless range. The Diskin perform a bit better than the Bohm in direct line-of-sight but in a regular office-like environment, the obstructed range is about the same. They're surprisingly far-reaching compared to some more expensive, better built wireless headphones, which may be due to their relatively thin ear cups casing. On the other hand, they're a bit difficult to pair, and they don't have NFC or dual device pairing.

5.3 Battery
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What it is: The power source of your headphones. All headphones with active features have a battery that will deplete over time.
When it matters: To continue using the active features of your headphones. Some models lose features or switch off completely when the battery is drained, which limits what you can do with them until the next charge.
Score components:
Battery Type
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What it is: The type of battery that the headphones use. Usually AAA or embedded, Li-ion rechargeable batteries.
When it matters: When your headphones run out of power. Rechargeable batteries usually charge via the headphones Micro-USB port whereas AAA batteries have to be replaced or charged with an external device.
:
Rechargable
Battery Life
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What it is: The amount of time it takes for a headphones' battery to be completely drained. Battery life will vary depending on the active features used and volume level.
When it matters: For active headphones that connect wirelessly, have noise cancellation or other audio-enhancing features, that cease to work once the battery is dead.
Good value: >10hrs
Noticeable difference: 0.5hrs
:
10.43 hrs
Charge Time
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What it is: The amount of time your active headphones have to be connected to a power source to charge from 0 to a 100%. However, charging time will vary depending on your power source.
When it matters: To be able to use the active features of your headphones. Especially, wireless ones that completely switch off and need to be recharged when the battery is dead.
Good value: 2h or less
Noticeable difference: 0.25h
:
4.4 hrs
Auto-off
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What it is: A feature that turns off the headphones, after a set time, when they're not in use.
When it matters: To prolong battery life when the headphones are not being used, or if you forget to manually turn off your headphones.
:
No
Audio while charging
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What it is: Some active headphones remain usable while charging. They continue to stream audio and do not disable other active features.
When it matters: This makes sure that your headphones's battery are not being drained when your relatively close to a power source. However, this means wireless headphones will need a wired connection to the power source during the charging process.
:
No
Passive Playback
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What it is: Active headphones that still work when all their active features are turned off or out of power.
When it matters: If you run out of power and do not have spare AA/AAA batteries or access to a power source to recharge your headphones.
:
No

The Bohm B-66 have a battery life that's just below average. Unfortunately, they take surprisingly long to charge, which makes them not ideal for prolonged use. They also can't stream audio and charge at the same time coupled with the lack of an auto-off feature, results, in a poor battery performance overall.

0 App Support
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What it is: The additional app provided to enhance your listening experience. They typically deliver a set of practical features that give you more control over the sound, noise cancelling and effects that the headphones produce.
When it matters: An app with a lot of features allows you to customize your listening experience to suit your taste and preferences. For example, additions like an equalizer can give you more bass or treble and room effects can simulate a bigger Soundstage in closed back headphones.
Score components: Subjectively assigned

No compatible app.

In the box

BÖHM B-66 In the box Picture

  • Bohm B-66 Headphones
  • Carrying case
  • Audio cable
  • USB cable
  • Manual

Conclusion Amazon.co.uk CHECK PRICE Right

6.7Mixed Usage
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What it is This is the combination of the different use cases to evaluate how versatile the headphones are. Therefore an everyday headphone should be well-rounded enough to adapt to most situations and environments without significant losses in sound quality, design ergonomics or isolation.
Score components:
Decent performance all round the Bohm B-66 will make good everyday headphones if you like their on-ear design.
6.6Critical Listening
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What it is The level of audio fidelity a headphone can reproduce. Therefore a balanced and true representation of bass, mids, treble, soundstage and imaging, as well as a comfortable listening experience, is essential for critical listening.
Score components:
Above-average for critical listening. They have a good sound but their closed on-ear design limits their soundstages.
6.4Commute/Travel
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What it is How well the headphones handle the loud environments involved in commuting or traveling. Therefore your listening experience should be comfortable, hassle-free and as isolated from noise as possible.
Score components:
Mediocre for commuting. Noise isolation is a little weak, but they're lightweight and a decent size to carry around on your person.
6.9Sports/Fitness
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What it is How well-adapted the headphones are, to use while doing sports or strenuous exercise. Therefore the headphones should not be too cumbersome and deliver a stable and comfortable listening experience.
Score components:
Decent for sports use. They're tight on your head and won't fall easily. However, there not too comfortable.
6.9Office
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What it is How well the headphones can deliver a comfortable and isolated listening experience in an office-like environment. They should not leak much and should block the noise of a busy office.
Score components:
Mediocre for office use. weak isolation lets the chatter of a busy office seep into your audio but they don't leak much.
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Questions & Answers

6 ANSWERED QUESTIONS
4
I picked up a pair of these for $37 just to try out and immediately noted the lack of ANC quality. However, I took them on a plane a few days later and noticed pretty quickly that when I covered the headphone and charging ports with my fingers performance increased dramatically. I plugged them permanently (with electrical tape!) when I got home and they sound much, much better. Not technical but it made a huge difference and for $38 it was very low risk.

Interesting find! We can confirm that the ports on the B-66 seem to be leaking into the earcup enclosure. Plugging the ports improves the isolation performance by as much as 12dB, in the Mid Range.

Bohm Ports Isolation
0
I wonder if the self noise is measured with bluetooth active (player playing a blank audio file). My Bohm 66 headphones makes a very distracting noise (interference) when listening at low volume that is probably much higher than 12.86 dB. It happens only when the player is actually playing or has just been paused. Or could that be a malfunction of my copy? Thanks for the great site!

Self-Noise for the B-66 is measured with Bluetooth and Active Noise-Cancelling enabled. Also, please note that the self-noise value does not represent the peak amplitude but the average amplitude of the self-noise, which we believe is more perceptually relevant. That's why we only consider self-noise values of 12dB and lower, as a good value.

Having said that, we believe the noise you are hearing is indeed the self-noise. It seems that when Active Noise-Cancelling is set to Off, the B-66 tries to save battery by shutting itself off in the absence of an input signal. That's why the drop in self-noise is quite noticeable. However, with Active Noise-Cancelling set to On, the amplifier inside the headphones stays on, even when playback has been stopped, and therefore the self-noise is constant and less noticeable.

0
Is there an effective way of adding volume controls to the headphone?
The Bohm B-66 have a slightly unintuitive control scheme. To change volume levels, you have to press and hold the volume buttons. A simple tap will skip tracks instead.
0
I'm total novice want to use this gift to watch movies on my iPad. The first day, wonderful. When I tried the next day, not a sound. I'm using the audio cord. What is my problem.? I'm 82 with zip technical knowledge. Thanks
The Bohm B-66 will continue playing audio even when the battery is completely drained, so there may be a couple of things that are causing this issue: The first being that once the headphones are out of power, they will only play audio if noise canceling feature is turned off. The switch on the right ear cup must be toggled downwards so that you see the small red marker, indicating the off position. If this does not solve your issue, make sure that the audio cable is properly plugged into your iPad. Also, when fully charged the headphones should play regardless of the noise canceling feature. We suggest charging the headset for a couple of hours and trying again, to check that your unit is not defective.
0
Follow-up on the BOHM B-66. The battery barely held a charge for longer than 20 minutes. Fully charged, all works well until the low battery signal starts in. Usually dead about 3 mins later. Any plans to test the Sony MDR-1000X? Would love to see results against the Bose QC35s. Thanks for all of the great work!
It seems that the Bohm B-66 has a low manufacturing tolerance. Our unit is still working and holding a charge for up to 10 hours after repeated battery drains, and we've used them a couple of times in the office without any issues. However, we've had several questions about the Bohm and Diskin's fluctuating battery performance, and our unit does take a surprisingly long time to charge fully. I would suggest contacting the manufacturer as your unit appears to be defective. Also, the MDR-1000x review will be posted very soon.
0
Is this Qi-enabled? I have one and the USB port is broken and can't be charged with wire charger
Unfortunately, the Bohm B-66 do not support Qi wireless charging. We have yet to test a headphone that is Qi-enabled and would appreciate any suggestions to add to our to-do list.
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