The subwoofer does need to be broken in, but if you are using the same amp and sub, for the best quality sound and to be heard, set your gain about 3/8 of the way, Set the LPF to 100-125 Hz, and

Great quality product that is also affordable, couldnt recommend more

Great Bass and Quality

Amazing sound quality, very loud and all from a small package

The sound quality is fantastic, and I never imagined that they would sound so good

Top notch quality brand, excellent woofers, they sound loud and deep.

Rockford Fosgate really does have some of the best and highest quality car audio that I have ever used

Getting to the actual performance of the sub, For the $125 I paid for this subwoofer this has to be the loudest 10" Sound Quality subwoofer I've ever heard

Sealed box is what I recommend for the best sound quality.

If driven by a powerful quality amp, unreal bass and sound.

Amazing sound quality, very loud and all from a small package

Sound quality is amazing, got it hooked up to Kenwood Kac-8105D 1000-Watt Class D Mono Amplifier ,wired it to 2ohms

Unreal quality.

Great Quality sound

Killer build quality and for the price, it makes this a no brainer!

Top quality sub, very satisfied.

Very good quality Subwoofer

After a month of use I purchased a ported 1.4 q-bomb Box.

Got a single ten with the 5001xD amp and a q bomb box

and ur neighbors will hate u!!

While you definitely "feel" a good kick drum, its not quite as punchy or clean as it should be