This is my first post. My UE 4 SuperFi's gave up the ghost about two years ago. Since then i've been using cheap ear phones, but finally disappointed with their quality I bought some UE600's recently. I am really happy with them, especially on the iPhone 3GS were they seem to have better bass than on either the USB X-Fi Surround 5.1 Pro or IDT 92HD94 (internal sound card).
I'm just wondering why that is, is there some artificial boosting of bass on the IPhone?
I know the low impedance (9 ohms at low frequencies) of the UE600's can constrain bass but the internal sound card specs state 0.1 ohm output impedance (minimum! no maximum or typical stated) and the bass there isn't much better than on the X-fi (I hear they are 10ohm o.O output impedance). I'm waiting on word from creative to see what they say.
Getting to the point. Do the UE600's need an amp with a especially low output impedance to get the most out of them and if so can you recommend one for around $100.