The Orange Tiny Terror 15-watt tube amp has always been interesting to harp players, I think, but it was less than ideal because of its very high gain preamp stage and its EL84 power tubes. That makes it a fun guitar amp but makes it shrill and feedback-prone when mic'd up for harp.
I developed the MM Harpman pedal with amps like this in mind, but I haven't had the chance to test the pedal with this particular amp. Today a customer ordered the Harpman to put in front of his Orange Tiny Terror. I'd like to hear the TT amp calmed down and warmed up a bit. Hopefully he'll send a video. I'll post it here if he does.
http://www.memphisbluesamps.com/harpman