These things are amazing! No matter how challenging the load, these things rock! They also sound really nice at lower volumes.

500 clean high current watts into 4 Ohms.

I have paired them with the JR Capri preamp and with some Conrad Johnson tube preamps, sound great with both.

Jeff Rowland Amplifiers, 201 Monoblock Pair. Great amps in nice condition, a couple of minor scratches, see pictures. 

They function perfectly. 

Non-smoking home.