B&K EX442 power amplifier can be had for $400 - $500 used. It's 200 wpc into 8 Ohms, provides plenty of current, and it has balanced inputs and a detachable power cord.
You can get a B&K Pro-10 preamplifier for about $400 used to finish off the system. Good luck!
You can get a B&K Pro-10 preamplifier for about $400 used to finish off the system. Good luck!