1 or 2 ohm amp for Alprine type R

no you need a dual 2 ohm to wire down to 1 ohm. and my massive nano n2 800 watts rms at 1 ohm small footprint lots of power.pm me if interested

Alpine Type R's do support a dual voice coil always, I think. I have seen some two ohm subs too, so that is what you're saying to go with and a mono amp?

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If you get a sub with dual 2 ohm coils you want an amp that puts out the power you want at 1 ohm, if you get a sub with dual 4ohm coils you want an amp that makes the power you want @ 2 ohms. Either way is fine. And mono amp would be ideal yes.

The Type R can be used at 1 2 4 or 8 ohms, depending on the model, the 1243D has dual 4 Ohm coils, so it can be wired to 2 ohms or 8 ohms, and the 1223D has dual 2 Ohm coils, so it can be wired to 1 Ohm or 4 Ohms, it's pretty much about your preference of amplifier, if you want to upgrade your system in the future, the best bet is to find something that will give you your power at 4 ohms, because when wired lower it will give you more, if not, you can find something that will do 600W at 2 or 1 ohms.

To recommend an amp we'd need to know your budget, including whether you need a wiring kit ect.

Oh god. Please upgrade the 8ga wire to atleast 4ga. Don't be cheap.