I've driven my 3A Sigs with a Krell KAV300i integrated, a Musical Fidelity 308 integrated, a Pass Labs Aleph 3, Audio Research VT200 and Ref 110 (currently).
The Aleph 3 was not powerful enough to really drive them in my larger room. The others were all good with the two 150w SS amps having better bass slam than the tubed ARCs.
I've added subs and a crossover and now feed the ARC Ref110 a signal crossed over at 100Hz. This combo is the best of all of them.
Even before adding subs I found both ARC amps had plenty of bass extension and slam for me.
The Aleph 3 was not powerful enough to really drive them in my larger room. The others were all good with the two 150w SS amps having better bass slam than the tubed ARCs.
I've added subs and a crossover and now feed the ARC Ref110 a signal crossed over at 100Hz. This combo is the best of all of them.
Even before adding subs I found both ARC amps had plenty of bass extension and slam for me.