I do not fully understand the question. You subwoofer can be wired either for 1ohm or 4ohm impedance. Why do you need 2ohm bridged?Im looking for suggestions on amp for my alpine 1223d. I would like a SQ stereo amp that can do500w 2ohms bridged or a SQ mono amp that can do 500w at 4 ohms im not against buying oldschool amps.
Impedence will be determined by how you wire the subwoofer, has nothing to do with it being bridged or not.. I believe your subwoofer has dual 2 ohm voice coils so it can be wired to 4 ohms or 1 ohm. You are likely going to want to wire it to 4 ohms.when i run it on a bridged amp at 4ohms doesnt it change it to 2ohms since its bridged? I only have 1 sub. I havent messed with car stereos for 15 years i thought it used to be that way atleast.