my current system consists of Musical Fidelity M6PRX amp and M6PRE. I am also using a Mytek Brooklyn Dac + and PS Audio phono stage. Both the Dac and Phono stage have preamps and the M6PRX amp has switchable inputs. I took the preamp out of the system and am running the Dac and phono straight to the amp. It sounds very good and I tried it for several weeks but I will be putting the Pre back in simply because with the pre it sounds "more musical" to me. Hard to describe, both are very good but with the Pre it just sounds right. This may be a dumb statement but doesn't every component deconstruct and reconstruct the signal ?