Is there a lottery with headphone drivers, similar to processor chips or monitor panels, where every one is a little different? I had two pairs of AD900x's. I swear the new one I got has less low-end than the last one. Also, this might explain why some people describe things about certain headphones that I don't hear at all.
Is there a lottery with headphone drivers, similar to processor chips or monitor panels, where every one is a little different? I had two pairs of AD900x's. I swear the new one I got has less low-end than the last one. Also, this might explain why some people describe things about certain headphones that I don't hear at all.
Most makers try to match drivers for each headphone as they will differ a bit from one another. I doubt there is a big difference between them but maybe some.
According to some it is due to the headphone drivers breaking in. My personal take on this case is not the drivers that break in, but the earpads of your new AD900x. Try pushing the headphone towards your ears in order to emulate more worn earpads. I think you'll find the bass will increase because of the fact that you are pushing them down and the distance between your ears and the driver decreases.
Even the examples you've chosen more or less answer your question: no. As with your examples, the product meets its desired specifications, but certain examples handle being pushed beyond their specifications better than others (and that's where this example because useless/not applicable because there's no analog with headphone drivers). There will of course be slight manufacturing variations between models, but if the manufacturer is doing their job right, they're selling a uniform product. Huge variations are more likely the result of wear and tear, especially on components like the pads (as Fadem points out). Break-in is also a debateable phenomenon - Tyll did a series on it for IF that had inconclusive results, if you want to read more: http://www.innerfidelity.com/content/evidence-headphone-break and http://www.innerfidelity.com/content/measurement-and-audibility-headphone-break and http://www.innerfidelity.com/content/break-part-deux
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