I am currently expecting my Lumia 920, and will do a review of this when I get it.
I am currently using iPhone 4S with my Monster Dr. Dre Studio Headphones, where the sound is fine.
The iPhone's equaliser does NOT work with ANY other app except with the native iOS music app. So I have a question. For the Lumia 920, does the equaliser work on other apps except the native music app?
I also got my brand new Nokia-Monster HD headphones which I'll review later, but from what I have heard so far, the Dr. Dre ones are abit better tbh - just know that the cord for the Nokia ones makes the iPhone go beserk, it shifts the volume up and down, noisy sounds come up and down etc, so I had to use my Dr. Dre cord for my iPhone 4S.