Audio-Technica's ATH-AD900X sits on the mid to upper end of their performance line. It is meant for those on a budget who are still serious about audio quality. I would consider them a second step up on the audiophile upgrade list.

When my wife runs off with the review gear before I even get a chance to check it out, I know it's gonna be something good. In this case, she saw the slick-looking Audio-Technica ATH-AD900 headphones , planted 'em on her dome, and never looked back.

Comfy like a La-Z-Boy, but much more lively; Large 53-mm drivers give a frequency response between 5 and 35,000 Hz; Lightweight, durable design; Ear fatigue not an issue

Bass-heads need not apply; Wearing these, don't be surprised if people peg you for a Trekkie

The A-T AD900s are a wonderful headphone, especially for the price of ~$230. The lows are very detailed and not boomy at all, however, it doesn't extend terribly deep, though more than many, and the impact is pretty good. Mids are smooth yet detailed, and there aren't any dips or peaks.

The biggest thing people seem to knock these 'phones for is "lack of bass." I wouldn't say they have a lack of bass, the bass is just more balanced with the mids and can sometimes be drown out by the highs.

Beautiful, crisp highs, well defined mids, fairly large sound-stage; Great for listening to acoustic guitar, vocally driven music, or anything with precise instrumentation; Pretty good fit and finish.

They aren't as comfortable as they could be, that's where they loose one egg. They want to sit on my head (which is probably larger than most; I wear a 60cm hat for reference) in a position that doesn't provide optimal acoustics. I find myself adjusting them fairly often.

Spectacular cans with a low barrier to entry, the ATH-AD900s are a great first step to high-end audio.

I bought my pair on the used market, sold in the area by a very serious audio fan. I have waited one year of use to do this review. They were in perfect shape when bought and I got spoiled by the price, $80.00.

- Fair price; good build; not too heavy; the sound

- Sound stage can be altered if shifted too far on the ears

Very recent acquisition, headphone during break! I tried the DT770/880/990 Beyer, Sennheiser HD650 ,

The AD900 were my first set of real cans. Frankly, I think they sound great. They are the most detailed pair of cans I own (also the most expensive, so people reading for truly high hi-falutin' audiophool reviews should go elsewhere, I'm all mid-fi).

I've owned many headphones over the years & at one point in my life, I sold audio gear. These headphones fit over the ear, are very comfortable and have a very open, transparent sound. The bass is detailed, without boom. The critical midrange frequencies are very accurate - voices sound natural.

I bought them in Harrods (London, UK) for a much cheaper price than here in Amazon. There they are 149 pounds. Cheaper than this and cheaper than the AD700X. Which is still much more expensive than they are in the US (where this cost barely 100 US dollars). I couldn't believe the price.