Thanks! I have tried it that way but I can’t get the pedal to work. There is a line driver out on the back panel!
https://www.gear4music.com/Guitar-and-Bass/TC-Electronic-RH750-Bass-Amp-Head-Nearly-New/35UO?utm_source=tradedoubler&utm_medium=affiliate&utm_content=0&tduid=6e396192346297d97b73f280e4fa7035&network=tradedoubler&affiliate_id=3044027&publisher=RedBrain+UK