I just pried at the seam with a knife and it cracked open, luckily along the seams. YMMV as they say.
The input pins on the TA1101 are pins 10 and 13, but when I tried to feed a signal in there, all I got was screeches and oscillation and I quit before I blew something up. Find the data sheets for the TriPath TA1101B and the Micronas UAC 3552A USB DAC if you want to know the down and dirty on that amp. The other major part is a 5V to 12V step-up DC-DC converter to power the TriPath chip. The TA1101 puts out 10W/chan into 4 Ohms, and both sets of speakers I have measure 8.1-8.3 Ohms DC resistance, which makes their 1 KHz impedance probably 9 or 10 Ohms, so the true power is more like 4 or 5 Watts per speaker. Plenty for computer listening, not enough for a rock & roll party.