Just curious, I've been reading about The PAS3 and other vintage tube line stages having difficulty properly driving modern SS amps with low impedance inputs. I was curious if anybody made buffer stages to match Pre out to low input impedance (Not necessarily tube.). Basically just looking for drive without gain. Are (were) there commercially available or kits or DYI things like that on the market? I do hate to add additional things to the signal path if i can avoid. its also not necessarily a problem right now. It just seems like it would have come up before.