Wow , I didn't expect to have folks get in a debate comparing Spectral with other brands. I have a Spectral DMA-150 series II amp and DMC-20 series 2 preamp. I have had them for several years mated to Avalon Ascendant speakers and find them to my liking. My reason for asking is should the amp or pre go bad, beyond repair etc I would not be in a position to purchase another Spectral component. Obviously I would need to look at used or replace both units. Anyway, thanks to those who directed their response to my question.
