Re: audioque hdc3 12 on a nine.1 and something is wrong...
Im powering two with an IA 20.1 and they sound good at all levels. I would guess its prolly your gains.
Equipment for sale-220A alt, Eminence Delta 10" speakers, BNIB MB Quart Q4.80, (2) IA 20.1's (Newest Version), SI BM Motor w/ Basket, (2) Deka Intimidator G31 Batts, 2 RD Sonance 15's with baskets (need recone).
Refs: Scott S, hornedfrog1985, dsmdan, Newageking, DBboom, R/T Pimp, SQcrewcab, Bumpin Buick, tangelo95, fearof85,
coma_toast, Blackga, spy, LouisianaCRX, Oxsign, etc...