The infamous 'wings' are back again in these Audio Technica headphones, but we've got no complaints about that. This suspended arc is similar to the system used in AKG headphones, making them particularly comfortable to wear. Unfortunately, in the A900x, a firmer suspension system would have been nice. When you put the headphones on to your head they tend to slip down a bit too far and overshoot your ears slightly. That's even more of a problem in this particular model as its aluminium casing makes it heavier than other, plastic models in the range.
Although that can be a little annoying—especially since this design system is already quite sensitive to user movement—the headphones are just as comfortable to wear as the original ATH-A900. That's particularly good news given that you're likely to be using these headphones around the house while kicking back and relaxing.
On the downside, the only accessory supplied is a mini-jack to 6.35mm adapter. In this kind of high-end product, we'd at least expect a removable cable.
Audio Quality: Perfect BalanceAlthough Audio Technica has a reputation for being heavier on the high frequencies rather than the bass (which is true of the AD range), Audio Technica has been moving its headphones towards a more balanced output. In fact, only a very small handful of manufacturers can boast a frequency response as balanced this. Lower mediums, in particular, are reproduced better than before and are genuinely present in the output. The same can be said for lower frequencies too. The peak at around 100 Hz gives the sound a lively, punchy edge that's not unpleasant.
ATH-A900x: Frequency response – no complaints here!
Listening to the output merely confirms that these headphones do a top job. The output is clean, crisp and accurate. Sources can be positioned with ease and the sound stage is wide—very wide, in fact—for closed-back headphones.
You could find yourself very slightly surprised the impression of audio projection and compression that's typical to closed-back headphones. However that's merely down to a design choice, and isn't related to the intrinsic quality of the product.
THD+N in %
Harmonic distortion in dB
On the whole, if you haven't yet had the pleasure of encountering Audio Technica, you won't be left disappointed once you hear these headphones in action. Whether for listening to music or audio monitoring, the ATH-A900x will do a great job.