Truly cheap passive, Schiit SYS, $50 + shipping. I bought one just to play with. Use it with my Dynaco ST-70 amp.
Is upgrading pre worth it?
I Own a Denon 7.2 receiver. I am using it for a pre. I have an st100 Rogue amp. What difference would a nice pre make? for 1500 used Rogue pre would I get 1.5k worth of sound.