Is this cheating? Bypass audio through a stereo

[madlabs]

I am acquiring parts for a tube amp so at some point it will be hollow state. It does sound and look good but I just don't like not using the set's speaker. However, until I can improve the native audio I am going to use the stereo. Or perhaps make a small tube amp just for the sets speaker.

One thing I noticed is that when not being fed any sound and the set volume cranked I still hear contrast buzz. So part of the issue is clearly bleeding through.