Which preamp for Quicksilver mono amps?

Thanks for all your input.

What preamp are you using now and what specific improvements are you looking for.  Also, what’s your budget and are you looking for new or used?

My preamp is Audible Illusions M3B. Amp is KT Mono with KT150. I am not looking for any sound improvement. I have not yet thought much about matching KT mono with QS preamp, but since QS preamp is relatively cheap ($1500), I am interested in trying to compare with AI. I just have about $1500 to spare, so if I go for other brands, it should be a used one.

Sounds like it wasn’t a good idea to consider a QS preamp.

The AI preamp recently had new tube sets from Audible Illusions. The sound got much better with the new tubes, but I wonder how long it will last. Maybe I need to change the tubes every 3~4 years? That was one reason why I was toying around having a QS preamp which I presume last much longer than AI preamp.

It sounds like not that many people match their QS mono amps with QS preamps. I wonder it is because QS preamps are not as good as QS power amps?