Size does matter, don't let her, ehemm, anyone tell you otherwise!

 

The JBL Fuse is made almost entirely for this. Also it likes more midbass territory than actual subwoofer territory

 

That's it.

 

These little sealed drivers seem cool for this use. I would love to see some which test well and don’t have plastic enclosure resonance issues. I wonder if any have been tested.

The form factor and convenience factor is hard to argue with. My only personal concern would be the “fart box” effect or higher harmonic distortion levels giving away the position of the box and ruining the sound stage.

 

So far there is no problem about it giving way its location. But then again I am not driving it hard either. The under seat subwoofer is some local brand, Chinese made product. Not the best in tonal, but it works and sounds fine so far as the Audiofrog GS6 midbass is doing a nice job from 100hz to 200hz.

 

They're pretty tight hitting and they have passive radiators.
I didn't do any measurements but it feels really solid.

 

Those are nice. And if the midrange is capable enough, then that thing could completely replace the door midbass.

Or use them as stereo front woofer.

 

Hey if they sound good they sound good. Also moving midbass out of the doors is a great thing for a ton of reasons. Okay-to-good drivers in an optimal location is often better than stellar drivers in a bad location.

 

That's right!

 

I put them as the lower end with a Gladen Alpha 130 set in a customer car.
Iirc, i put the crossover in the HU around the 200-250hz mark

 

The Jbl fuse is a excellent kick bass alternative for this situation as said above. I used them for a while in my old car before going full bore and building sealed 9 in drivers underseat and they had nice performance from 50hz to 160hz for me with a good amount of impact. I highly recommend for people who don't want to cut up their vehicle or go full crazy install.

 

@JohnnyOhh it splits in half

 

it does?? whaaaa? seriously?

 

Yes each side is about 2.5 inches tall

 

ah ok. i'm going to make like a tree and leaf the area. that jbl woofer / pr combo looks nice.

 

I have one Kenwood ps8w in the attic from my first go at sound improvement. Do you think I could introduce this in to my setup, running it with the same crossovers as existing subwoofer + time alignment for more upfront bass? Or if I used it at a higher range as more of a large woofer, do I need two a right and left or will one work? What frequency up do you generally need a l+r?