Boss CXX8

600W 8" Chaos EXXtreme Series Single 4 ohm Subwoofer

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• Peak Power: 600W
• RMS Power: 300W
• Injection Molded Polypropylene Cone
• Foam Surround

Learn more about the cxx8

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This item has been discontinued

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(2) Boss CXX8 Subwoofers + Belva 1500W Max Amplifier + Belva 8 Gauge Amp Kit

600W 8" Single 4 ohm Subwoofers Package (Includes 2 Subs, Amp, and Amp Kit)



Product Highlights

• Peak Power: 600W
• RMS Power: 300W
• Injection Molded Polypropylene Cone
• Foam Surround



Authorized dealer

General Features:

  • 8" Single 4 ohm Chaos EXXtreme Series Subwoofer
  • Power Handling:
    • Peak: 600 watts
    • RMS: 300 watts
  • Black injection molded polypropylene cone
  • Foam surround
  • 1-1/2" High temperature aluminum voice coil
  • Top-mount depth: 3.6"
  • Sensitivity: 83B
  • Authorized Platinum Internet Dealer
  • 1 year Sonic Electronix, and 2 years Manufacturer's warranty

Priced Individually

Boss CXX8 owner’s manual

Subwoofer Wiring Guide

Wiring Guide to Wire 1 Boss CXX8 Subwoofer

Mono Amp

2 Channel Amp - Bridged

Wiring Guide to Wire 2 Boss CXX8 Subwoofers

Mono Amp

2 Channel Amp

4 Channel Amp - Bridged

Wiring Guide to Wire 3 Boss CXX8 Subwoofers

4 Channel Amp

Wiring Guide to Wire 4 Boss CXX8 Subwoofers

Mono Amp

Mono Amp - Option 1

2 Channel Amp

2 Channel Amp - Bridged

4 Channel Amp

Specifications & Details

Subwoofer Specifications
Chaos EXXtreme Series
Subwoofer Size
Peak Power Handling
600 watts
RMS Power Handling
300 watts
Voice Coil(s)
Impedance (Per Voice Coil)
4 ohms
Voice Coil Material
Voice Coil Diameter
83 dB
Subwoofer Design
Round / Circle
Main Cone Color
Woofer Composition
Injection Molded Polypropylene - IMPP
Woofer Surround
Magnet Structure
Magnet Type
Subwoofer Grille
Re-Cone Kit Available
CTA-2031 Compliant
Recommended Enclosure Specifications
Recommended Enclosure Type
Ported / Vented
Top-Mount Depth (Mounting Depth)
Cutout Diameter
Shallow Mount Installation
Electromechanical Parameters
Free-Air Resonance (Fs)
46 Hz
Total Speaker Q Value (Qts)
Electrical Q Value (Qes)
Mechanical Q Value (Qms)
What is in the box?
User manual
WITB: Subwoofers
Other Accessory #6
Warranty and Return Policy
Parts Warranty Duration
3 years
Labor Warranty Duration
3 years
Warranty Provider

Item Details


Model Number:




Internal SKU:


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Product and How-to Videos

Customer Ratings & Reviews

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Small sub good sound...

I purchased this sub as a replacement speaker. I'm happy with the sound and would recommend it to others.

By Tommy on March 30, 2015


found this helpful.

great subs

Beats harder then other 8s sounds like 10s if you have limited space like I do in my truck they are perfect

By Carl on June 5, 2015 checkmarkIcon Verified purchase


found this helpful.

great deal

This product was easy to install works great and the price was great. Would buy this item again

By Desmond on June 29, 2015


found this helpful.

Boss CXX8

Great prices on great equipment and Fast delivery thanx sonic

By Anonymous on March 6, 2019 checkmarkIcon Verified purchase


found this helpful.

First Sergeant

Top line quality I replaced old MTX 8's with a pair of BOSS subwoofers all I can say is wow they are over powering my 12 speaker set up in my Silverado 3500 HD. Thanks BOSS got the hardest hitting dually in SC

By TOP on October 23, 2015


found this helpful.


Bought this to add a additional subwoofer to my home entertainment system and so far i am very pleased wit this purchase.

By Tyler on March 28, 2016


found this helpful.

Great Small Subwoofer

I installed two of these in a sealed enclosure. Great tight bass, hits hard for a small speaker. Cannot go wrong at this price.

By David on March 26, 2016 checkmarkIcon Verified purchase


found this helpful.

Great, while it lasted!

I bought 2 of these for a mild system in my F150. The pair wired @ 2 ohm at about 300 watts really hit hard and low. I had them in a sealed box that was double the size it should have been and, I believe that is why one blew. It was very easy to push them past their excursion max with the box volume so large. My Fault. Decent quality, great price.

By James on February 11, 2022 checkmarkIcon Verified purchase


found this helpful.

Great item!!!

Recomiendo este art?culo 100% porque lleg? muy r?pido y funciona perfectamente. Gracias Sonic Electronic!

By Yaneidis on December 26, 2016 checkmarkIcon Verified purchase


found this helpful.

Awesome bang for the buck

Running 2 of these bridged to an older JL audio mono amp. I'm only pushing around 250watts to them and so far so good! I replaced some extremely old kicker 8's in the original "still water designs" truck boxes. Very small boxes that these Boss subs just barely fit in. The boxes aren't even the ideal volume for these, but the sound is impressive to say the least. I have them mounted behind the seat in my 76 Chevy stepside. It was my dad's old truck, and his old system. I just upgraded amps to some I had laying around in the garage, as well as an Alpine deck, and some Kenwood 6.5" separates in the, these 8's pound! Nice clean bass for cheap, and I'm barely pushing them. I nice amp with a little more power, maybe run 3 or 4 in a custom box and it would slap! Loving these subs! Hard to believe what you get for the money! We'll see how they hold up, but from what I read, Boss really stands behind their products. So far I'm impressed with the sound the subs produce.

By Dads7t6 on August 30, 2016


found this helpful.


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