well i just got a jl 13.5 alpine deck 2000 watt pioneer premier amp 4 gauge wiring but the sub isnt hitting it full potention would i need a capacitor or tell me whats wrong
probably your amp isn't any where near 2000 watts and the 13 W7 is a dual 1.5 ohm subwoofer that you have to wire for a either a 1.5 ohm load or 3 ohm load. you would need an amp that does a true 1200-1500 watts at 1 ohm or at 2 ohm