I got a Classic linestage in and put it in the system today.
As a 1:1 isolator it is superb (at max volume). It breaks the ground connection between Overdrive DAC and amps and the result is simply amazing. Improves air, liveness and cymbol decay.
As a volume control it is great too, but not as good as my Overdrive volume. This is expected. I would venture to say that it will beat 95% of active preamps, everything affordable.
for Overdrive customers, this is a BIG upgrade actually. I am looking into a simpler balanced 1:1 isolator for those customers that dont have any analog sources.
Steve N.