In reply to Armstom:Built the Stage Center as a stand alone unit (with the spring reverb tank inside it was a "pedal" that is about 35 cm long by 15 cm high and wide). I use it as both a booster and a reverb unit. I put it right before the amplifier if using it as a reverb unit for guitar. I found that it works great with a microphone as well - boosts a dynamic mic output hight enough to effectively drive a spare amplifier, and adds reverb to the vocals!Good luck to both of you - Josh_777 and Armstrom. (Armstrom, you might pose the question in the effects forum, this is a "bit" off topic for this thread - just a suggestion!)Thanks Josh_777 for your kind patience!