I have a few questions about the 2220:
1) I just bought a pair of Maggie 1.7i's which are nominal 4 ohms but have been measured down to 2.8 ohms at certain frequencies. The 2220 is rated to 4 ohms but not sure if going below this will strain the amp, cause it to clip, or trigger thermal protection are decently high levels?
2) I'm considering pairing it with a Quicksilver Line stage pre-amp. The RCA input on the 2220 has an input impedance of "Less than 10k" while quicksilver has an output impeadance of "100 ohms, 20 Hz-20 KHz" and maximum output of "60 volts RMS, 20 Hz-20 KHz". The 2220 has input sensitivity of "1.6V 8ohm load/ 1.4V 4 ohm load".
quicksilveraudio.com
Mono? Mini? Micro? Magnificent? Whatever that M is, this is one UNREAL little single-channel amp. 200 Watts (conservatively!) into a 3-inch chassis with balanced input stage to offer Common Mode Rejection! MANUAL See Front Panel Huge See Rear Panel Huge
outlawaudio.com
So reading these stated specs anything to be concerned about with pre / mono matching in this case?