answer:A terrific option is the Sonic Impact 5065 Gen 2 T-Amp. Available at amazon for $59.99 It’s a digital amp which means it’s small, sips power, can run on batteries, but puts out a surprising amount of clean sound. The original t-amp sold for $29 bucks. It’s now practically a collectors items. At last looks folks were asking over $80 for a used one. No ipod dock but this device satisfies your other requirements plus it can be portable or AC-powered with the included power supply.