Right now I have 2 12" Alpine Type R's (SWR-1242D) in a sealed enclosure running off of a Alpine PDX-1.1000 amp. I'm using my stock head unit from my 98' Audi A4, so the source is from a line output converter.
Now if I were to get two of these (REF-TM12.2 - 12" Tidal Audio Subwoofer Dual 2 Ohm)...