Turntable placement Advise.

Well you can't put it on a speaker so it'll have to go 18 feet away. How about a phono amp beside it to drive the cable? Or wall mount it to the side of the center speaker. ..

I would rather have the 18 foot run from phono preamp to system preamp than expose my TT to that much vibration. Bad idea.

Agree. Either wall mount it or buy a stand-alone table from IKEA or maybe 2nd hand. Then use isolation under the TT. Also you'll need a shielded phono/RCA cable for a longer run.

Get it out of the listening room. The acoustic energy produced by the speakers will excite the TT no matter where you put it in the listening room. Next best solution is an acoustic screen. I know, I know my solution is not practical, but you did ask.

You will not be watching/listening to HT explosions while also spinning LPs, will you? In other words, you will never have the center channel speaker on while using your turntable. If that is the case, I would not worry too much. Why not just try the TT in both positions are hear which sounds better.

Personally, I would not have HT and 2-channel audio in the same room. I would also place the turntable on a side wall on a very sturdy rack with some kind of isolation platform between the turntable and rack. But that is only if you want to optimize each of the two systems. Combining them as you describe may be a necessary compromise which you can't avoid.

Okay so let see if I have this right.
Hook up the TT to the phono pre-amp box using short cables. Then the pre-amp to the audio/processor which by the way it's an Amthem AVM 50 using the long interconnects.

Thanks

Okay so let see if I have this right.
Hook up the TT to the phono pre-amp box using short cables. Then the pre-amp to the audio/processor which by the way it's an Amthem AVM 50 using the long interconnects.

And yes the center speaker will be off when I play the record player.

Thanks

Okay so let see if I have this right.
Hook up the TT to the phono pre-amp box using short cables. Then the pre-amp to the audio/processor which by the way it's an Amthem AVM 50 using the long interconnects.

And yes the center speaker will be off when I play the record player.

Thanks

Think again about putting a turntable on a speaker, working or not. It will act as a vibrating platform feeding noise back into what needs to be as stable a platform as possible reducing quality of output. Also what is the speaker sitting on? You need something rigid and level.