Home theater bypass

Hey thanks for your suggestions but most of it is Greek to me. It looks like the safest way is to continue to plug and unplug as needed. Maybe my next preamp or amp will have a factory bypass. Again thanks 

What model CJ preamp do you have?  I thought they've been including HT bypass on their preamps for years.  Let's just start there. 

It's a pv-1 the first preamp cj made in the 70's. I have a Onkyo 805 7 channel with preouts but I don't know if you can run two preamps in series to the amp which is a Mac 275mkvi. 

If you want to use the Mac 275 for both stereo and HT duty, there will be two ways for connections:
1. Use a line level source selector connect to Mac 275 input to select the output from cj preamp or Onkyo 805.

2. Connect the Onkyo 805 front R/L preout to cj pv1 one of the line level input (not the phono) and set the cj volume control to unity gain position during HT playback.

To find the cj volume control at unity gain position:
connect the cj preamp main output to Onkyo 805 one of the analog input (i.e. CD input),
connect the cj preamp monitor or tape out to Onkyo 805 another analog input (i.e. AUX1 input),
connect a cd player to the cj preamp to play some test tone,
switch between the two input on Onkyo 805 and adjust the volume control on the cj preamp until both input getting same loudness/SPL.
Mark that volume control position on the cj preamp front panel, it’s the unity gain position.