subs amps help

hi guys I have been researching to get a new sub. It will go sealed in a fiberglass wheel well enclosure of about 1.40 cubic feet maybe more less than 1.75 cubic feet Im sure! Im looking for more SQ than SPL so my list have gone down to IDQ 12, JL 12w3, sa 12, A local store got the Jl for 200...

Car: 2004 Mazda 6 Stock alternator MY CURRENT SETUP Headunit: KD-A735BT it has 3 Pre-Output Terminals being 4.8V Line ) Front speaker: JBL GTO608C 6-1/2" 2-Way Grand Touring Component Speakers (140 watts per set/70 watts each side RMS) 2 ohms Impedance Rear speaker: JBL GTO938 coaxial (200...

I am upgrading my system with these three items : 1) JBL GT6-6 6-1/2" 2-Way Car Speakers - Sonic Electronix (JBL Gt6-6 for my door speakers) 2) JBL GTO938 Grand Touring GTO 6" x 9" Car Speakers (JBL GTO938 for my rear deck) 3)JBL CS1214 12" Single 4 Ohm CS Series Car Subwoofer (JBL CS1214...

First, could this amp Amazon.com: Cadence Acoustics Xa125.2 500 Watt Peak 2-Channel Class AB Amplifier (Orange): Electronics power my two 12' audiobahn AW1251J Or could this amp Walmart.com: Sony 2/1-Channel Xplod XM-GTX1852 370-Watt Car Amplifier: Auto Electronics power those same two subs...