Search  for anything...
EARTHQUAKE

EARTHQUAKE Sound SLAPS-M12v2 12-Inch Mass Tuned Passive Bass Radiator for Home and Mobile Audio Subwoofer Enclosures

  • Based on 23 reviews
Condition: New
Checking for the best price...
$76.72 Why this price?
Holiday Deal · 23% off was $99.99

Buy Now, Pay Later

As low as $12.79 / mo
  • – 6-month term
  • – No impact on credit
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout.

Payment plans are offered through our trusted finance partners Klarna, Affirm, Afterpay, Apple Pay, and PayTomorrow. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Selected Option

Free shipping on this product
This item's return window has been extended for the holiday season: FREE refund/replacement until Jan 31, 2026

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

Availability: In Stock.
Fulfilled by Amazon
Arrives Tuesday, Nov 11
Order within 8 hours and 44 minutes
Available payment plans shown during checkout

Recently Viewed

Style: 12-inch (v2)


Features

  • Increases subwoofer output and efficiency without additional amplifier power or enclosure volume
  • Patented design that allows for new subwoofer design possibilities where even small enclosures can be tuned to low frequencies
  • User-tunable for optimum performance for a wide range of enclosure sizes and musical preferences with preinstalled 270g mass included
  • Can be integrated into virtually any subwoofer/enclosure combination with a slim mounting depth of less than 3 inches
  • Adds up to +6dB of bass compared to conventional sealed and ported enclosures; Enables deep bass from a compact volume without any annoying port noise

Description

The Earthquake Sound SLAPS-M12v2 is a tunable passive bass radiator that significantly increases subwoofer efficiency and ability for ultra-low frequency reproduction without additional amplifier power or enclosure volume. Designed to perfectly complement all good quality long throw woofers on the market, SLAPS add up to +6dB of bass compared to regular sealed and ported enclosures. The benefit of SLAPS being user-tunable is that they can be integrated into virtually any subwoofer/enclosure combination. SLAPS (Symmetrically Loaded Audio Passive System) overcomes the limitations known from the conventional sealed and ported enclosures that tend to limit excursion. As the name indicates, SLAPS is built symmetrically, distinguishing it from traditional or other inferior passive devices on the market today. SLAPS technology integrates a dual structure of identical opposites in its suspension design, resulting in identical properties in both the negative and positive pressure domain. The high efficiency and performance are a result of the pneumatic coupling between SLAPS and an active driver. The unique and patented design of SLAPS allows the active driver compression-free excursion, resulting in a deep, dynamic, and powerful bass response.

Brand: EARTHQUAKE


Speaker Maximum Output Power: 10 Watts


Connectivity Technology: wired


Audio Output Mode: Stereo


Mounting Type: Flush Mount


Model Name: SLAPS-M12v2


Speaker Type: Passive Bass Radiator


Special Feature: Increases sound pressure level (SPL)


Recommended Uses For Product: Subwoofer enclosures


Compatible Devices: Desktop, Television


Subwoofer Diameter: 12 Inches


Unit Count: 1.0 Count


Surround Sound Channel Configuration: 2.1


Included Components: Product insert, SLAPS-M12v2 passive radiator with mass installed, Warranty Card


Product Dimensions: 2.25"D x 12.37"W x 12.37"H


Item Weight: 2.1 Pounds


Is Waterproof: FALSE


Warranty Type: Limited


Number of Items: 1


Control Method: Touch


Speaker Size: 12 Inches


Power Source: Corded Electric


Woofer Diameter: 12 Inches


Water Resistance Level: Not Water Resistant


Customer Package Type: FFP


Audio Driver Type: Dynamic Driver


Audio Driver Size: 12 Inches


Subwoofer Connectivity Technology: Wired


Includes MP3 player?: No


UPC: 689759101642


Style: 12-inch (v2)


Manufacturer: Earthquake Sound


Item Weight: 2.12 pounds


Item model number: SLAPS-M12v2


Date First Available: October 17, 2023


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Tuesday, Nov 11

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Similar Products

Top Amazon Reviews

    • SlapsV2
Review Image by Brandon D. Mccain Brandon D. Mccain
Review Image by Brandon D. Mccain Brandon D. Mccain
Review Image by Brandon D. Mccain Brandon D. Mccain
The media could not be loaded. This version feels more beefier than the V1 for some reason-so quality went up a notch. The cutout is slightly different than the v1 (smaller) so I had to make plates so they fit Over the original v1 hole. The specs (IN Detail) can be found only on the Earthquake EU website-and not the American one for some reason. No big deal. I have them in a 2.4cf box which puts it at 24hz (no mass). They are in the box pictured that housed my V1s. 4 total on 2 15s and WOW. They are loosening bolts all over the car. You may loose a db versus ported but the quality makes up the difference. Definitely worth it. I love the fact that I didn't need to make a box that took up the entire front and back my trunk for these lows. No EQ in the car but do have it on a crossover. Do it right and you'll love it. Make sure your sub has a Qts of .4 or below otherwise you may break something. ... show more
Reviewed in the United States on April 11, 2024 by Brandon D. Mccain Brandon D. Mccain
    • I found the limits!
Review Image by Robert D. Robert D.
Review Image by Robert D. Robert D.
The media could not be loaded. I ran this for a couple of years in a diy home theater sub and not knowing what I was doing had way too much weight on it trying to get it to dig low. It made my sub bottom out and I had to turn it way down. About a year ago I decided to try it in the trunk of my car with a different subwoofer and played around with the weight. I ended up removing the pre installed weight and took it down to about 200 grams total and in my 1.2³ft box, that was exactly what I was looking for. With my single skar svr12 on 1.5k this thing dug down to ~ 25hz before dropping off noticably. I probably still had too much weight as it started ripping the inner surrounds and ripping apart the passive radiator. I don't know if it impacted something in the trunk or the weight over time cracked the cone. Anyways it ended up destroying itself but I'm so impressed with the sound that I ordered another. I got 3-4 years out of that one so it didn't owe me anything. I'll attach a video of it beating and the aftermath, but if you're more sensible than me and willing to actually take the time to tune it instead of just throw weight at it and go you'll get even longer use out of it without with of destroying things. I never thought I could get a single cheap 12 to seriously flex my windows at 26hz but this little beast made it happen. Even though I killed it I obviously still recommend it, it's expensive for a pr but definitely worth it! Now to get this new one broken in :D ... show more
Reviewed in the United States on May 25, 2025 by Robert D. Robert D.
    • This bad boys really do slap. But it later cracked ..
Review Image by # 1saturn # 1saturn
Review Image by # 1saturn # 1saturn
These bad boys really do slap next best thing to a ported box but can be placed into a smaller box...Days later it cracked I got another replacement and that also crack. I will look into a diffent brand.
Reviewed in the United States on February 17, 2025 by # 1saturn # 1saturn
    • No more port noise
Review Image by frabor frabor
Review Image by frabor frabor
I was given am old 12" MK powered sub, with a dead amp. After using it for a while , I really did not like the sound, is was not low enough. So I decide to retrofit the unit by removing the amp, closing the gap and slapping a 12" slap in its place. The result has been tremendous and strong clear bass, it has taken the sub to new levels. You can add weight to tune it to your liking by using washers and nuts. It has a very robust and strong thick rubber surround with a very respectable XMax. The unit is very nicely built, very robust and ready for low bass "abuse". ... show more
Reviewed in the United States on January 14, 2025 by frabor frabor
    • 7 months later... disaster!
Review Image by Bart Furgler Bart Furgler
Review Image by Bart Furgler Bart Furgler
Review Image by Bart Furgler Bart Furgler
Review Image by Bart Furgler Bart Furgler
This was my first time adding a passive radiator to a sealed speaker. It's amazing how much additional volume this adds to such a small box. The sub digs deeper without unloading like it would with a port. It sure does shake the box around when it hits the resonance with that weight... the radiator is much heavier than the woofer coil. It's a good idea to install two radiators on opposite sides of a box, i might try that next. I would buy this again. I added 1 to a single Skar VXF 12 in 15 cubic inches. Update - it only lasted 7 months... i am sad and disappointed. The plastic around the bolt cracked sending the weight flying into the subwoofer magnet. I am lucky it did not short out the terminals on my subwoofer. I knew there was a problem because i started smelling MDF dust from inside the box. Just to clarify, i did not add any extra weight to the unit. It's just the minimum weight it came installed with. Also, I'm not running my car at competition SPL, it's only 1500 watts cruising around town! I considered adding a large washer to the front to sandwich/clamp the plastic, but the plastic has a long crack. The material is too brittle and it will surely fail again. If you decide to buy this, i would remove the foam dampener and E6000 glue the weight into the plastic ring before installing. This would spread the pressure from the bolt hole to the larger reinforcing ring and perhaps avoid this failure. In my case the integrity of the plastic has been compromised so no repair is possible. ... show more
Reviewed in the United States on January 24, 2025 by Bart Furgler Bart Furgler
    • These work good but build quality/design is lacking.
I have 2 12in slaps paired with 1 12in sub running around 1200-1500 watts in a properly designed enclosure for this setup. My initial impressions, I was amazed to achieve the output and sound quality I was able to achieve with these. Fast forward only two weeks and I start hearing what sounds like a loud interior panel rattling. After further inspection, I noticed one of the slaps has a crack on the front side, Starting right below where the weight is mounted internally. So I exchanged it through amazon return thinking i received a bad unit. Not even a week later another crack in roughly the same area. CONCLUSION: these do allow for big deep bass from a smaller sized enclosure but will only last if you’re using them on a low power system, maybe 1000watts max if you use two passives per driver, maybe 500 max if you use 1 passive per driver. ... show more
Reviewed in the United States on October 19, 2024 by Anonymous
    • Great product
I’vehad this product for over a year and a half… it’s holding up very well and yes you can term the difference. I installed in a triple sealed box with 2 P3 12” subs with this in the middle… sounds a little better than my ported box tbh
Reviewed in the United States on October 3, 2025 by Mr. Smith

Can't find a product?

Find it on Amazon first, then paste the link below.
Checking for best price...