Spectral DMA-200 is one of the BEST thumpin' pure Class A amps there is, can be had for a song. I have two( will not sell`either). Better than 99% of new amps produced today.
The DMA-200 does NOT need a Spectral preamp. I can drive
very reactive speakers to ungodly listening levels
without congealing, becoming hard, or nasty sounding. One
of the reasons for stop making them was cost. Bass control
is unbelievable, without peer except maybe Krell, the highs
are very smooth, and the mid range is to die for. Once you
have one of these you will not go back to tubes and I have
two tube amps ARC D115 and D79A!! Good Luck!!!