Rockville W8K9D4 2000W Peak 8-Inch Car Audio Subwoofer Dual 4-Ohm, High-Power Output, Durable Build, Deep Bass, for Car Audio Enthusiasts

I have too say am very impressed!! I’ve had in the pass 2 kickers L7 also 2 12 JL ‘s I’ve own plenty of 12 inch speakers with plenty of cheater amps I’ve Ben around the block as I’ve right now I still have a few cheater amps put away i still have 1 kicker ZR1000 and a ZR600 also a few ADS amps ..I own a Audi b8.5 I didn’t want to put 2 12’s in my trunk this time I wanted to upgrade the factory 10 inch subwoofer and a separate amp just for the 10 inch sub.. so I bought this 10 inch and I installed it where the factory sub was on the back top wow it almost didn’t fit I didn’t realize it was tall but it did.. I also sealed everything back there I used my alpine cheater amp as it’s only one Chanel And small amp it’s pushing 700 watts perfect for the speaker..the speaker i got was 10K9D4 4ohms wired to 2 ohms . this set up sounds nice it hits very low I have to say am impressed how it sounds.. some of my friends that have 2 12’s in there trunk couldn’t believe I was pushing 1 10 inch.. anyone reading this that don’t know to much about stereo systems keep in mind that a good brand amp comes a long way and keep in mind I have 4 cheater amps one of my amps is a true rms 1000 watt and I didn’t install that because it’s only 1 10 inch subwoofer and the most I’ll give this speaker is 600 to 700 watts Without blowing the speaker and trust me that’s plenty for one 10 inch this setup hits good in every music I throw at it ..I never owned 10 inch speakers I always went with 2 12inch ..now if I bought 2 of these speakers then I would of used my ZR600 cheater amp I still wouldn’t use the ZR1000 I would only use my ZR1000 if I had two 12’s my point is u don’t need to use a kicker ZR1000 cheater amp on 1 10 inch subwoofer u will blow this speaker ..I don’t understand y companies say 3000 watts on a speaker when true rms is 600 watts it confuses the newbies.. hope this helps someone That doesn’t know to much ..agin for the price of this speaker u can beat it ..I went with speaker because I didn’t want a box in my trunk o I forgot to mention I had a 10 inch kicker 8 ohm speaker with the factor amp before I installed my alpine cheater amp and this monster subwoofer ..5 stars for this speaker good price and well built speaker and very very fast shipping Update 2021 I ended up buying a second one these speakers with a good amp pounds I only had 1 at first I replaced the factory 10 inch to this speaker and I sounds like I have 2 12 inch subs in my car every one that hears it can’t believe the setup I have it hits nice I bought a nother one that’s how good these speakers are I have no complaint I can’t believe how well made these speakers are for the price . And the package is very well packaged for delivery..

Sounds better than expected.not only you hear the bass but feel it too. Have a high powered amp,use a pair of these speakers and feel the power.

I mounted this subwoofer in a waterproof ported enclosure so I can remove it out of my boat. I have always wanted a great sound in my boat, this definitely hit the bullseye. I did the enclosure because I do not always need the subwoofer in my boat so I can remove it when I don't need it. I was worried this thing wouldn't sound that great.......I was sooooo wrong this thing bumps like no bodies business. I hooked it up to a Rockville RXM-S6 amp and this thing pushes it great and I have other channels for the rest of my speakers. You guys have my vote and so far many of my friends who have heard the system will become customers as well. My head unit is the Rockville RGHR2 love the set up. I have a set of 8" rockville marine speakers and 2 sets of 6.5" polks. great sound for the money. GET YA'LL SOME!!

The Rockville subwoofers are my pick for sound and power handling. My X8 keep popping tinsel leads. But still great X8 sub repairing it for a final third time. Went with the K9-8 to see if I can poke fun at my X8 history ....lol. The two 10 inch I picked up in February 2019. The 8 inch I bought in October 2019. The bottom two are nice for heavy excursion purposes only. Not bad for the price that I purchased them for. However, I had to repair one of the coils that was bad myself because I believe it had bottomed out. I believe that it was never correctly aligned from the manufacturer. But, it has been hanging hard now for over a year since I repaired it. So much so that it's twin coil is weaker and it sucks in on high pressures. Already purchased the materials and just have to tear it down and rebuild it. It's all being pushed by a hearty and healthy 2500 watts with no problems!!!! Hope you enjoyed my review on your subs and my pics.

I bought this 15 inch sub to replace what is now two different blown subs. Each of the previous ones had slightly different musical qualities to them and I had had the first one for over 25 years, so was really accustomed to how it sounded. This sub impresses in all the right ways. I have it powered with a Rockford Fosgate amp that produces 300W RMS @ 2ohm which is more than enough to get this bumping hard. I studied a lot of reviews before buying. All of them pointed to the quality materials and construction but warned about running these too hard. My setup appears to be a good sweet spot. Running it on the lower power end like I am easily explains the weaker hit at the extremes of the dynamic range, which could likely be improved with a tuned enclosure but I have no complaints and dont intend to change anything. I have it in a sealed box and all in all this will provide the deep boom you want out of a 15 inch sub, at an affordable price. I can easily overpower the rest of my system with bass notes if I turn this up. And I enjoy the sound it provides in all types of music from classical (the cannons in the 1812 overture) to the old western classics of Hank Sr and the boomy rap rock/metal I love. And it's shaking the heck out of my F150 super cab! I might need to track down and try to dampen out a few new rattles!

Best 8" subwoofer Can handle bass and performance

Bought the 10" K9D4 3200 w max sub. and have it with a MB Quartz 1500 watt mono amp. Bumps lovely but sometimes depending on the song it will clip the amp. So I have to pull over, pop the trunk and reset the amp in the middle of traffic ( and look like a cornball ) then lower the volume a notch or two depending if the song has long deep bass on it.....then I got to keep it on 22 volume level, can't roll it up to 25 where I like it. So all the mirror shake and rattle and sometimes the trunk just pops open in the middle of the freeway going 90mph because of the banging of the dual K9 box. Love it! Got to get me a MB Quartz 2000 watt amp to try that set up. Maybe no clipping there. I just like the bass control level all the way up. I'm an all balls to the wall kind-a-guy. Rockville amps are too expensive right now for me but maybe by the end of the year Ol' Saint Nick can hook it up! I guess depends if I'm mistah Nice guy Aah! and grease him with a box of Chips-a-hoy....that fat old bearded guy HoHoHo!

Wooooow awesome I bet it sounds so good thank you 🙂 I would install it on Friday my day off

Amazing little sub for the price. I built a .5 cubic foot box for the 6.5 K9 and this thing totally surprised me. It hits hard for something so small. ***EDIT*** After the first few weeks I could start to hear a faint rattling from the subwoofer. Yesterday it got a who lot worse. Decided to take it out and inspect it. I found that the dust cap has half come off flapping around causing the noise. Looks like it didn't get much or any glue at all to hold it down on one side. Frustrated that there is no Amazon drop off near my place and will most likely have to pay postage to return it. 4 months in and the foam surround splits.

Great customer service and packages were well packages inside the box. The speakers are perfectly made.

24v 16.7a power supply(400w) powers up 1200w(20a) dc/dc boost converter that powers monoblock amp(600w) pushing roughly 250w to the subwoofers, honestly the cheaper $70 sub(CTSounds Tropos) sounds the same, the only difference is your orice, don’t get me wrong i like the woofer but $160 for 6.5”? really?? i would pay $170 for the 8” & i did 💯 i wanted to buy another one i look at the price again it costs $275 😮

I have 1000 Watts RMS going to the sub and it sounds amazing!! Tight accurate bass that makes my eyes bounce with The Beat.