I have a set of MA Audio Subwoofers. and a L Vented Box. I used these in my show car on weekends only. These subs are practically brand new. about 10 hours of play time.

These subs sell on Techronics for 186 a piece. and the box runs about $100 bucks. Here are the specs on the subs.

Descriptions:
12" Competition Subwoofer
Dual 4-Ohm Voice Coils
240oz. Double Stacked Strontium Magnets
Reinforced Ribbed High Foam Surround Technology
Patented Thermo-Cooling Motor Structure
Copper Clad Aluminum Voice Coil Wire
Heavy Duty Non-Pressed Paper Cone
Ultra Strong Polypropylene Dust Cap
New Patented Black Die-Cast Basket
Hi-Temp Kapton Voice Coil Former
Dual Progressive Dupont Spiders
Platinum Plated Block Terminals
Rubber Sealant Gasket
Mounting Depth: 6.5
Mounting Diameter: 11.2
Optimum Vented Box: 2 Cu/Ft
Round Port Diameter: (2) 4
Square Port Area: 25 Sq/In
Port Length: 16
Optimum Sealed Box: 0.75  1.25 Sq/In
Specifications:

Subwoofer Size 12"
Impedance 4 ohms
Dual Voice Coil Yes
Peak Power Handling 1200 watts
RMS Power Handling 600 watts
Surround Material Reinforced Ribbed High Foam Surround
Sealed Box Volume 0.75  1.25 cu. ft.
Ported Box Volume 2 cu. ft.
Sensitivity 89.86dB
Frequency Response N/A
Top Mount Depth 6.5"
Cutout Diameter 11.2"



Price $250 or Best Offer.