So I've hooked a Traynor Group Three guitar amp head to a Peavey Backstage Plus which I think is a bass amp. The reason for this was that I needed more tonal control because the input is shot so I plugged it into the back, but when it's in the back my tone knobs do nothing and the Reverb acts as a volume. So I had the idea to hook the Traynor up for more tonal control. So the real question is: Is this okay to do?
Hi, you're better than me. Have a nice day!

Guitars: '02 Ibanez Jem 7vwh
ESP LTD Alexi 600 Yellow
Ibanez RG560CA w/ SD Invader
Carvin DC747 Vintage Yellow
Ibanez RGA 8 QM w/ Dimarzio D-Active and PAF 8
Washburn KC-70v
Bass: 1980 Aria Pro II SB Elite II
Amps: Vox VT20+