Customer Ratings & Reviews

Really nice !

This 12” passive radiator, working in conjunction with my 10” sub-woofer, BLOWS-AWAY my Infinity bass-link that was in the trunk of my 1999 Mazda Protégé for about 5 years. It's also tight, and has PLENTY of bottom-end !

What I have:
amplifier for sub-woofer (Precision Power i650.1)
sub-woofer (Earthquake Sound DB10)
passive radiator (Earthquake Sound SLAPS-M12)
sealed sub-woofer enclosure (Belva MDFS12)
receiver (Kenwood KDC-X898)

By Michael on August 26, 2015 Verified purchase

Good product

Product works great and very easy to install and use.

By jason on October 19, 2017 Verified purchase

Great for smaller enclosures.

I have one of these in a 1.4cf box with a Pioneer TSW1200 pro. I removed the 255 gram weight that it came with and installed 10 grams with washers. It's now tuned to 34hz and sounds fantastic. Good low end. Better than the ported. No port noise and and it's easier on the subwoofer. I am using the sub channel of my Massive Audio NX3 (400 watts at 2ohms).

Great replacement to eliminate port noise

Firstly I'm a long time user of earthquake subs and passive units , I built my first 12" sub box 20 yesrs ago, I WISH THE MAGMA LINE WAS THE SAME DESIGN, but it's still awesome and the same sub has been in 4
Pickup trucks and still sounds great .
let me say the new slaps is better because you can tune it to your box size and taste