RECOIL BB-69 Bass Blocks Designed to Protect Car Audio 6X9 Inch Speakers, Eliminate Frequencies 0-300Hz at 4Ohms, Pair

They do well, allows the bass to cut through on your subs better when used on all 4 door speakers (not the subs) makes you feel the kick an attack more focused and centered that door speakers usually muddy up. vocals can blend better cause you can push the volume a bit more how you eq from your radio and amp make a big difference if you know what to do you can get a pretty okay sound stock nothing beats running an amp though. but easy cheap and good buy!

Really good tbh I bit the bullet on getting these for my tweeters and they honestly work amazing really clear and easy to wire they have been hooked up for about 6-7 months and no issues

I installed 3.5" speakers and they didn't take the bass at all. You'd have to lower the bass and keep the volume down so they wouldn't distort. I put these in line on the speakers and they block the lower bass frequencies perfectly! You can tune your stereo as you want with NO DISTORTION from the smaller speakers!

Seems to work as expected. I used the 300 Hz "6x9" blockers for a pair of 3.5" dash Kicker speakers -- keeps enough of the lower end bass from hitting them. The enclosure is unnecessarily large however.

Fixed my distortion issue on my tweeters. Great product. Easy install. Would recommend.

I put these in front of some Kicker CS series 3.5" coax dash speakers in my 22 WRX, along with a resistor, to help balance out the 3.5s with my new 6x9s that share the front channel.It made an absolutely huge difference and improved the sound massively.

I bought a pair of infinity 3.5 to replace the OEM ones on my Ford Explorer, I used the infinity bass blockers that came with the speakers and the speakers ended up with that annoying crackling sound, I returned them and spoke to a friend who is a professional high end audio installer and he said to purchase these bass blockers as they are excellent.Right away the feel of these were far superior to the ones that came with the infinity. Easier to install as the ones that came with the infinity were a hard Coper and these were more bendable to make the install easier.Once I installed them, I immediately put some house music on, and played it loud, three weeks later and these were an amazing choice. No blow outs, no crackling, just amazing sound.

Nothing really changed. I still have to turn down the bass in my equalizer so my door speakers don't sound to distorted.