I have a 12" Type-R 1221D (2ohm + 2ohm load) and it sounds nothing like it should. I know this cause my freind had exact same sub and it sounded 30X better, even though he hadtoo much power too it and blew it. Ive heard others. The solid bass is... well decantly clear but when a hard drum hits or bass hits it sounds like complete A$$! I have a Pioneer deck, Kenwood KAC-819 which gives 300X1 RMS @4 ohms. Have subwired to 4 ohms, and i have tried about a 1ft^3 box and around a 1.38 ft^3 box. Both... a$$. I am tempted to get the Alpine amp, MRV-t420 which gives 340 or so RMS. Since alpine can handle a little more power, but im afraid to do too much. That will most likley help, but any other recomendations. I know it should sound better than it does. Anything with be nice. Thanks