These have been billed as DJ headphones and have been around for the past decade or so (introduced around 1994). They have a bass hump typical of most DJ headphones and the bass quantity is more than sufficient. However, this doesn't neccessary mean its lacking in details. Quite contrary, this sounds brighter and more detailed than my M20s (these are supposed to be studio phones instead of the Pro6). Added bonus is that it is more efficient than the M20 and thus easier to drive especially out of a portable player.

As for the sound signature, I'd say that its rather balanced mids and lows, with a slight emphasis on bass and some treble rolloff. Whilst some may critic this as inaccurate and thus not worth an audition, I'd actually view this as a plus from an engineer's viewpoint. Over a long monitoring period, the Pro6 excels in providing sufficient details (with some judicious use of EQ at times) whilst being not too bright as to be fatiguing, in short a nice balance.

As for comfort, the Pro6 like so many members of the AT family (especially the Monitor/Pro and the ART lines) has plenty of this, with heavily padded earcups and headbands that proves to be extremely comfortable. The design is exactly the same as the studio ATH-M40, which means plenty of adjustability for the right fit

Overall a surprisingly decent DJ/studio headphone that is comfortable and yet built to the usual durable AT standards

On a side note... Those who browsed up on this may find that the AT website lists this as 46 ohms instead of 40 ohms impedance. To clarify, apparently there are 2 versions of the Pro 6. It originally did come with 46 ohms. Later versions like the BP and MS came with 40 ohm drivers. Apparently later production Pro6s(black) came with the 40 ohm drivers and a slightly different wire (its now matte carbon instead of glossy black). The ones I have and being reviewed here are the 40 ohm driver versions from the Japanese market.