I have been offered one that I use in home theater, and I bought one for my car!
it is a car subwoofers 31cm in 4ohm 125 w rms,
highest quality: JBL!

SOUNDS

The sound is crystal clear,
do not do it too often mounted max 120hz

OVERALL OPINION

I used it to complement my home theater installed in a closed volume
it responds very well, a nice bass (deep bass) and do not type in your ears!
volume load can be very small, it is a real asset to a car sub
it is a subwoofer for those who own a car!
perfect value for money!