billtro
What tube pre-amps pair well with Pass amps?
Many don’t work with quite a few Pass amps as many Pass amps are low input impedance, and a lot of tube preamps are high’ish output impedances
You need to look at output impedance v input impedance 1 to 10 ratio or more for good impedance match. Otherwise it can start to become a voltage divider and "can" squash dynamic impact as well as output level.
Cheers George