Vintage amp as preamp


Hi-
I have a Harmon AV receiver in my family room and it doesn’t have a phono input. I have two vintage audio pieces:
Lenoxx Sound SL-700 (with phono in), A and B rca speaker outs.
Garrard Electrophonic console with built in turntable, amp, etc, A and B rca speaker outs.

Can I go rca speaker out to tape input on my Harmon receiver and effectively use either of these pieces as a preamp in that regard? My apologies if this is a ridiculous question. I’m learning as I go and I wasn’t able to find the answer online. I know it will generate sound, but will it result in any degradation to audio quality?
128x128eli_tackla
not good idea. the output signal out of console may be too high. chance of overloading input is pretty big to burn out the input stages.
Get an outboard phono stage and plug it into the aux, or other available input.