Which AV processors have an analog pass-thru?

I am confused why you would need this... why wouldn't you just plug the source into the preamp directly? I cannot think of an analog source that you would want to share between an AV processor and a preamp.

There are several analogue sources that you may want to keep that way. For instance, a tuner, TT, cassette, etc... would all provide you with analogue signals. No need to convert them to digital and then back to analogue. Hence a pass through would be something to look for. However, RCLad may be better suited to either looking for a two channel tube preamp that has a processor loop or plugging those sources directly into a preamp / processor that has analogue inputs. That is, if he can find a processor that suits his needs and offers good two channel sound. Sean
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I added a tubed preamp to my HT system for music and did just what Slartibartfast suggested. My Sony C333 SACD player is connected directly to the tubed preamp. The main L/R channels from the A/V processor, a B&K Components Reference 10, are also connected to the tubed preamp. You can also accomplish this goal by connecting the tape monitor out to the tubed preamp; my understanding is that the signal passes through the A/V preamp virtually untouched.

The Anthem Pre 1L and 2L are both tubed preamps with a processor loop - kinda the opposite of what you asked but they were built with your situation in mind.