Which AV processors have an analog pass-thru?

The Cal Audio Labs SSP-2500 does.

Sunfire's Theater Grand 2 does, and it is, surprisingly good for the price. More tube-like and musical than most <$2k silicone pre-amps I've heard.

I just checked the Casanova manual.

Analog inputs are routed directly to the tape-out i.e. bypasses all else in the pre-processor.

Digital inputs derive the benefit of the Theta DACs and then the output is passed to the tape-outs untouched by any other processing.

You can pick one up "previously owned" for around $5k US

The Primare P30 retailing at $4k is an excellent sounding pre/pro that I've been using in my 2-channel system for the last year. Has a 100% analog by-pass mode. A very simple design with no tone controls. In addition to the rca outs, it has xlr outs for the 2 main channels. It appears that the P30 was designed with a music first priority.

I've had a burned-in Ayre k3-x preamp in my home over one weekend performing side-by-side sonic comparisons. The Ayre was a tad sweeter and more musical but the Primare was much more transparent and detailed, as well as more appropriate midrange bloom when compared to a recessed midrange in the Ayre. IMO.

-John