I just bought Alpine 12" Type-r SWR-1242D 12" sub and a Alpine MRP-M850 amp now what kind of wiring do i need? im going to buy it on ebay so if someone could possibly tell me what to get that would be awesome.

 

You will need a 4 gauge wiring kit, and a 2 channel rca.

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Something like that, and if you are looking at going online, definitely consider buying from Knu, excellent company with great product.