I have an apogee duet (firewire) that sounds excellent with my new pfe232 IEMs. My ipod touch isn't "as" good, primarily, I believe, because of the impedance being lower. This causes a slight treble boost around 10khz. The duet also has slightly better overall detail/smoothness/tightness/etc.
I'm looking for an amp that will be for my ipod primarily. The duet has a 32ohm headphone output, so I would assume I should look for something like that with at least the quality of the duet.
Size isn't critical, but it does have to be portable. I carry a backpack, so larger portable to an extent is o.k. Something like the Fiio E17 looks nice, but I don't need the DAC.
Does anyone that has heard the duet have any recommendations. If it fit in a large pocket, awesome, if not, that's fine too. Audio quality is paramount. I want no noise added from the amp and a flat reference frequency response if possible. Tone controls are nice, but if it is truly very flat would be unnecessary. I never use EQ or processing on anything, so they aren't important to me really. Bass boost if very high quality and with small increments might a nice addition, but again, not needed.
Please let me know. My price range would be $100-200. The closer to $100 the better, but I realize to some degree you get what you pay for. And perhaps that won't even cut it, but just let me know your recommendations...