Black Diamond DIA-8D4 8" Car Subwoofer 4-Ohms DVC 400W Max

So far so good. I dont have 500w to power it at the moment since it is running in my home, but it sounds good enough for the price. I could potentially see a cheap wall of these being good bang for the buck

This is an interesting driver if the specs listed in the manual are accurate. With a qts of .898, these will work well free air or IB. The Fs is 41Hz, so it will really hit the midbass without worrying too much about pushing beyond xmax. It models well in a closed box too, but response drops off pretty quickly. A couple quick models (all sealed pushing 250w keeping below xmax):42L Fb 54 Hz F3 40 Hz56L Fb 51 Hz F3 39 Hz100L Fb 47 Hz F3 36 Hz200L Fb 43 Hz F3 35 HzSo interesting as a MBM in home use or mount a pair of these free air in the trunk and should be able to get low 30s with cabin gain.Again, with a .9 qts, it's not going to model will in vented. Best I could come up with quickly, is a 30L with 10x22cm port, tuned to 50Hz, with a sharp 35Hz high pass. 250w still keeps you below xmax with an F3 of around 40Hz with respectable port velocity.

Had all the parts. Simple and easy instructions made it a quick installation. Sounds awesome. A good buy

Isn't crazy powerful but it's what I needed and I'm very happy

This is a good subwoofer. It doesn’t get too loud but definitely adds just the tight amount of bass for your ride. I push mine with a 400w amp and it handles well. Good sound at low watts. Im very happy with it

It has a soft punch to it without making it rattle much. It has a lot of power and the mounting holes seem really firm and secure. I like how many mounting points there is because it makes it really versatile. The connectors are pretty easy to connect with the push in type but they do slide up when the wires are tugged too much. I looped the wired around the hole and it held a lot better.

I have not found an enclosure for this yet, but the rubber edge feels strong, build quality in general feels good, but definitely an entry level sub. I will update this review once I have installed it in my 2012 Accord.

This sub could annoy the neighbors and other motorists if that is your way, but it also sounds great at moderate power levels with all kinds of music. The bass is full and rich, not boxy or flat like some subs out there. And at under a hundred bucks, quite a good buy.

I really wanted to like this speaker. I even built a nice box for and battle brand new amp. Well, once I got the speaker in the box I noticed, there was a very small hole on the side of the rim very disappointed. Hopefully, I can get it replaced or fixed because. I wanted to like this subwoofer and I took a lot of time building the box for it.