Summary: I have a pair of these in my Subaru hatchback. I initially had them in a sealed box. They gave a decent thump, but I found them a little underwhelming considering what JL Audio is known for. I had my gain at -1 in the sealed box and it was alright, but I always found myself wanting to upgrade to something else. Instead, I recently ditched the sealed box for a ported box and it made a night and day difference.
Summary: Have just bought two of these and have always been a JL audio fan. I received them today, and was very disappointed in how they were shipped. The box that Crutchfield shipped it in was very flemsy and had the speaker boxes falling out of the bottom almost, and half the Crutchfield tape half already torn apart on top.
Summary: Put two of these in a sealed box for my f250 from supercrew sound .5 cu ft per sub paired with a jl 600 watt mono amp Let me tell you these things hit way harder than I expected to bad they are hiding behind my back seat love to watch Em flex am very pleased with the results
Summary: I have 2 of these bad subs in my f150 under the back seat in rhino lined sealed box being pushed by my MTX audio thunder 1000.1 amp! I was amazed on the amount of bass these subs put out! Also no matter how loud I crank it, the quality isn't distorted. If you want some bad subs with limited amount of space, these are them!
Pros: Compact, Loud, Quality, Reasonable Price! No reason not to get them!
Conclusion: I have two in a small enclosure behind my rear seats and they kick very hard with the limited power I feed them. I wish I could give them a larger enclosure but space there is not much space behind my truck's rear seats. Very happy with product.
Summary: I didn't buy them off amazon but I have 2 in a sealed box with a Gravity GR1100 amp bridged and running at 2ohms(with the bass boost), you can FEEL the bass!! in the seats, shakes my rear view mirror side mirrors, these speakers are great slap hard wont bring to much attention to your car but sound really good inside, had to dynamat parts of my trunk