Came across this thread as I was considering adding a preamp after my HT processor for the mains. My processor has a "pure direct" function (some call it HT bypass) where it disables all processing of the signal and even turns off the unit's front display and TV output signal to ensure the best pure audio. The unit is a McIntosh MX122, but still considering adding a Mc C53 preamp after it for feeding 2-channel-only audio. Tough choice as reading all the specs and reviews, it's hard to justify the outlay for a separate preamp when the specs seem to indicate that there would be no sonic benefit for human ears by doing this. Ith my current combo I think I've already got what most would recommend, for even critical listening, so maybe no benefit adding a preamp for the 2-channel-only stuff. Tough choice, but I think much of the opinions of 2-channel audio from a HT processor are based on low end and outdated gear. These days there are a lot of HT processors that are also fantastic for 2-channel listening.