can someone help me in this sub choice?? ?

P3SD412 specs per speaker:

12" Shallow Subwoofer
4 ohm Dual voice coil
400 RMS / 800 Peak power handling
Kevlar Fiber reinforced semi-pressed paper cone and ABS/Acrylic dustcap
Custom 10-AWG nickel plated push terminals
High density poly-foam surround allows for 20% greater linear excursion than standard surrounds
High-temp 2.5" voice coil with spun-laced Nomex® reinforcement collar
Linear spider with embedded 16 AWG tinsel leads handle tons of power
Protective PVC textured magnet cover
Reversible ABS trim ring
Mounting depth: 3-5/8"
Mounting diameter: 11-1/8"
Free air Resonance (Fs): 43Hz
Recommended Sealed box Dimensions: 0.60 – 1.20 cu cu. ft.
Recommended Ported box Dimensions: 1.25 cu. ft.
Sensitivity: 86dB
Magnet weight: 52oz
Frequency response 43-250HZ

2 MTX Jackhammer 12" Subwoofers including box and quick connections. Box is in great shape. Speakers are in great shape. Everything works!

This is a brand new PAIR of ALMANI S3F-12 car subwoofers. Each 12" shallow sub produces up to 1000 watts total max output (500w RMS). This sub has a mounting depth of 4 1/2" so it will allow you to fit them in tight spaces. It has an overmolded rubber surround to provide high bass output and low distortion. The molded nomex spider helps provide long term mechanical stability. It also has big push terminals for maximum power transfer from your amplifier. The peripheral venting helps keep the voice coil from overheating. The S3F-12 is part of the 3 Series from ALMANI. A combination of advanced acoustic engineering and state of the art manufacturing have produced outstanding bass for those on a budget.

This Premier® 12" shallow subwoofer handles 1400 watts max., 350 watts nominal power, and delivers deep bass with top-notch sound quality thanks to features like Pioneer’s extremely strong and lightweight IMPP Composite Double Cone Woofer, the patent-pending M-shaped Surround, and more.One of the new patent-pending features is called the "Air Suspension Control System". This design locks in air between the main cone and drive cone, ensuring smoother and more precise movement of the cones, for superior linearity. The locked-in air behaves like a spring, so there’s no need for a traditional spider structure. The drive cone also deflects air pressure inside the enclosure, which further contributes to the remarkable bass of the small package.

go with the JackHammers… overall better subs.. they’ll last a lot longer as well.

they’re a pretty serious sub too, i own four 12′s and they hit like crazy.