I second to TWB. I have to say MA1 is a dark sounding amp and if that’s what you are looking for. Back in the 90s, if you are looking for a quick tube amp OTL would be it for a lack of hysteresis from having no output transformers. Actually, MA1 did not sound like tube amp. I switched to Wolcott tube amps to feed the power hunger SL and love the full bodied sound from Wolcott, albeit not as nimble playing rock music but sonically more engaging that draws you into the performance. I would say you will be happier with Pass XA60.8 amp. I dumped Wolcott for class D amp two years ago to save from being burned by utility bills and skin as well.