Mistah gravy it's roadrunners amp, not mine, I will say that this amp has with MRF-455's or sd1446's. I think they are the MRF-455's myself. They aren't bad on ssb if not over driven, set your radio so the amp will have a dead key of about 50-60 watts max. No more than 15-20 watts pep from the radio. The radio dead key is going to vary depending on what the amp dead keys. But again it's not my amp PM ROADRUNNER if interested in buying. God bless.