CPS Extended Service Plan (more info)
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I have these powered by a 500Watt Rockford Fosgate Punch amplifier and they sound great. Handle rock music without a problem and sound great and fast on the double bass and bass guitar.
With bass-heavier stuff they will make your car shake for sure, but not as much as the 12" bigger, more power, ported subs. The quality is top-notch however and they do hit hard.
The enclosure construction is fantastic. Very solid and great carpeting. Be informed that each of the subs has 2 fuses attached directly to the driver. You will need to remove them from the box in order to see them. I had an issue of blowing a fuse and didn't know subs even used them, so I figured my amp was blown and had it diagnosed as fine. Only after I opened the box did I realize it had blown a fuze, preventing either sub (wired in parallel) from firing.
Sealed BassWedge Subwoofer Enclosure Loaded with Dual 10" WX Subwoofers at 2-Ohms Final Impedance
1200W 5-Channel Class D Car Audio Amplifier