Guys, I have follwoing setup which I am planning to take to next step by adding a sub. Front Speakers(Make/Model/Type/NA): Helix B62C comp- 50 rms, doors damped Rear Speakers(Make/Model/Type/NA): Helix 6X co-ax: 40rms HU : Kenwood KDC-U4549SD: 3 Preout (2.5V) Amp: JVC 3104 4/3/2 Channel Amplifier 800W Max Power 60W RMS @ 4Channel @ 4ohm 90w RMS @ 4Channel @ 2ohm 150W RMS @ 2Channel Bridged @ 4ohm Class-AB Circuit I am thinking of adding Infinity Ref1220se sub as I found the factory fitted enclosure makes justice to the performance. The sub is 300 rms @2 or 4 ohm (same sites say 2 and some reviews say its 4 ohm) however for now, I want to connect the front comps to front 2 channels of amp, rear co axials directly to the HU and rear 2 channels of amp to be bridged for sub which would offer 150W RMS @ 2Channel Bridged @ 4ohm. Is this feasible? would it be risking the amp? can a bridged 150 rms input do justice to a sub of 300 rms? Amp is directly powered through the battery, do I need to get a capacitor while introducing a sub? ohm part of the matching?