I installed this on
BMW 650i

Review
Currently, I have this subwoofer. It delivers superior low end. I noticed that in a larger enclosure or ported box it would be even better, but I do not have the space for that. That's sound quite sad. However, I have been very pleased and impressed by this subwoofer. Moreover, I love the bass a lot as it's very clear. Especially the bass drums really stands out. I love listening to metal and rock songs and HX 300 gives me much more responsive and have a cleaner hit!

What I like
The bass drums really stands out and also cleaner hit.

What I do not like
It is expensive.

I installed this on
Lexus IS250

Review
Currently, I have this woofer in a 1 cubic foot enclosure. It delivers superior low end. I noticed that in a larger enclosure or ported box it would be even better, but I do not have the space for that. That's sound quite sad. However, I have been very pleased and impressed by this subwoofer. Moreover, I love the bass a lot as it's very clear. Especially the bass drums really stands out. I love listening to metal and rock songs and HX 300 gives me much more responsive and have a cleaner hit!

What I like
The bass drums really stands out and also cleaner hit.

What I do not like
It is really expensive.

Review
These subs are very well built so pushing them is not an issue. They can go very loud with just a little bit of loss in tightness, but the bass tightness is excellent to begin with, and the kick of the bass is awesome. The bass isn't just fuzzy pounding, it's clear and audible. However, these are very expensive, so check budget first.