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.
- Great audio reproduction.
- Minimal leakage.
- Stable fit.
- Uncomfortable clamping pressure.
- Poor noise isolation.
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.
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.
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.
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.
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.
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.
Excellent performance. The only remark is the subtle bump in high-bass, which could muddy up the sound very slightly.
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.
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.
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.
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.
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.
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.
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.
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.
No compatible app.
In the box
- Bohm B-66 Headphones
- Carrying case
- Audio cable
- USB cable
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Questions & Answers
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.
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.
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