Beyerdynamic DT 770 Pro Review: Every Part Replaceable, Including the Driver

The disagreement about the treble

TechGearLab describes an impressively flat frequency response, with every instrument getting clear articulation whether it sits in the bass, mid or treble.

SoundGuys measured a very strong emphasis in the highest frequencies and recommends cutting everything above 6kHz by about 5dB to stop it becoming fatiguing.

AmperHeads describes a pronounced V shape with an elevated 8 to 10kHz region that causes listening fatigue on bright recordings, and suggests a notch at 9kHz.

Two of the three specify frequencies and correction amounts. One offers an impression. There is also a variant difference: TechGearLab tested a 32 ohm version while the others tested the 80 ohm, and impedance variants of this headphone are voiced slightly differently.

The safest reading is that these are not neutral, that the treble is the part people notice, and that an equaliser fixes it in ten seconds.

What makes it a twenty-year headphone

AmperHeads lists what Beyerdynamic will sell you as a spare part: velour ear pads, headband cushion, cable assembly, and the driver itself.

That last one is unusual to the point of being almost unique at this price. A driver is the thing that eventually fails, and on nearly every other headphone its failure is the end of the product. Here it is a component.

AmperHeads' consequence is that units from fifteen years ago remain in professional use. That is not nostalgia, it is a maintenance model.

The one part you cannot replace

The cable. AmperHeads describes it as soldered to the driver assembly, and SoundGuys measures it at three metres, coiled, with a threaded quarter-inch adapter.

On a headphone whose entire appeal is that everything is serviceable, having the single most failure-prone component permanently attached is a genuinely odd decision. SoundGuys' practical warning is that its relative fragility makes these unsuitable for commuting, which combined with the length is fair.

Comfort, with one caveat

SoundGuys scored comfort 9.0 at 249 grams and says you can wear them for hours without anything feeling off. The velour pads are the reason: they breathe rather than trapping heat, and glasses wearers prefer them because they do not squeak or catch.

AmperHeads raises the exception. The ear cup depth is shallow, so listeners with larger ears may find the driver touching. TechGearLab separately found the headband created noticeable pressure over extended wear.

Where they belong

Closed back means they do not leak, which is why they have lived in tracking booths for decades: a singer can wear them next to a microphone without the click track ending up on the recording.

The V-shaped tuning that disqualifies them for mixing is the same tuning that makes them good for gaming and for electronic music, which AmperHeads names directly. Bass impact and crisp cymbals are a feature everywhere except the one job the name implies.