i have an mtx thunder TA81001 class d and a thunder TA7804 class a/b. the 81001 turns on but makes no sound anymore and the 7804 has a short somewhere let me know if your interested.
Are you still buying? I've got several broken amps I no longer have time/ interest to finish. Three Orion HCCA 225s. One is a 1st gen & the other two are 3rd gen. 1st gen has no end plates or bottom cover. Also an SX250 that's a little rough. I'd like to get $100 for the lot.
I also have an old SS Ref500 that I ordered the power supply caps for & never got an farther on. I'd take $70 for it with the caps.