Connecting two amps to the same speaker is a no-no and can damage either amp. You would need a speaker switch at minimum. However, a better way would be to use your 2-channel setup as-is and run your 5-channel LF and RF pre outs into one of the Pass inputs setting its level to track the volume of the other channels. You would then use the 5-channel preamp to control the volume. This is what I do with my SGCD and AVM 60.
Yes, that is precisely what the Pass-Thru is for. It bypasses the volume control in your Pass Pre so that you can control everything from the Surround Processor. You would not use the HT Bypass in your Parasound for stereo music listening as you only want the signal to go through the Pass Pre to your BHKs.
Your Parasound preamp should have a left and right channel output in addition to the 3 additional channels. Use an rca or balanced ( if you have xlr outs ) to feed the by pass compatible input on your Pass pre. The Pass pre then feeds your left and right channels amps.
You then plug your stereo ( 2 channel ) sources into your Pass preamp and your multi channel sources into your Parasound pre amp.
When you want to listen to multi channel you use your Parasound for volume control and choose the bypas input on your Pass preamp.
When you want to listen to 2 channel you only use the Pass preamp.
When is what was mentioned above, but with more detail.
@vkennedy61 Sorry. The multich pre is a Parasound P7 and the 2ch pre is the Pass Xp-30. The amps are the Parasound A52+ 5ch ab and BHK 300 monos for the 2-ch. (I’ve updated the original post with the info. )
And for obvious reasons, I’d like to keep the 2-ch signal path free of extra electronics off at all possible.
Take the output of either the RCA (Yellow) or XLR (Orange) and hook them to either the Pass Thru or one of the inputs on you Pre. I don’t know the XP-30 so I don’t know if you need to use the Pass Thru or configure from the menu one of the Inputs as HT Bypass.
I am not sure what the 5 channel source it. Unused the P7 as the 2ch pre and that 5.1 input on the back needs a 5 channel source. I am not sure how having 2 pre amps gives 5.1. I believe the P7 vol only controls 2.1 system and when you hit bypass it becomes a 5.1 switcher and pass through only. it let’s you use same amp for L+R as well as feed to sub. But you still need something feeding it a 5.1 signal. Can be Blu-ray player or in my case it was an Anthem AVM60. I have upgraded to AVM70 and BHK pre with JL CR-1. But concept is same.
I may have missed something but if you have a 5.1 source and Pass has 2 ch bypass you don’t need the Parasound. The Parasound does have 5.1 outputs. Main outputs they are labeled. When you use a 2 channel input on the P7 it only outputs 2.1. When you hit one of the two 5.1 inputs if I recall you can set up it for bypass. There were a few things you could setup with bypass. I forget exactly what. It does work very well for that.
ok, there you go. you should just be able to put those in the two inputs and send the outputs to your amps. select that input and if it controls all 5 channels. You would want the vol on P7 to control volume so set the two sources to fixed. Bit different from having a HT processor where you want P7 to be passthrough. If I recall there is an option to swap from bypass to not bypass. Its been a while.