[Otto]

Hey there srbaker,

So I think I got this right -- you basically want to run sweeps and measure the response of a non-spinning TT to see how the bass is affecting your TT that's mounted to the wall. I think that's a great idea, and one in which I'm interested.

I recently had my Thorens TT sitting atop my rack (kinda high at about eye height), but it is simply unusable in that position. I had a ~100 lb person unknowingly walk into the room, and the stylus jumped all over the place. I'm working on getting a two-shelf wall-mount Target TT rack from a friend, and may well be experiencing the same issues you are.

I'm wondering -- rather than a non-spinning TT, might there be a calibration record out there that would simply output a constant tone? Then, you could measure it without the sweeps, then with the sweeps, and compare. I would imagine that there would be some frequency modulation with respect to the original signal.

Of course, measuring a non-spinning TT output may also show disturbances in the signal. I'd give it a try first (especially since I don't have any calibration records).

It may be easier to initially run straight tones through REW, rather than sweeps. It might be easier to identify a pure tone disturbance in your measured output.

Good luck, and let us know how it goes. I'm mounting my TT on the opposite side of the room as my sub, and somewhat away from the corner.

Interesting...