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Memphis Audio MOJO MJM822 8" 1800w Competition Car Subwoofer + Karaoke Speaker

$399.94 $239.95
(You save $159.99)
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(2) MJM822, (2) MJM822+dB16+RWK0CU, (2) MJM822+LC2i, MJM822+CyberBuds, MJM822+ROCKBOX, MJM822+RXD-M3+RWK41
, 49154

Warranty Information:


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Bundles That Include This Item

Items included in this bundle

Package Includes:
  • (1) Memphis Audio MOJO MJM822 8" 1800 Watt Competition Car Subwoofer DVC 2 ohm Sub
  • (1) Rockville RPB-KAR Portable Bluetooth Speaker + Karaoke Microphone + Party LED's

Description of MJM822:

Harness the power of MOJO subwoofers in a new compact package! The look, feel and power handling of MOJO subwoofers is now available in a powerful 8" version opening a new world of possibilities for Memphis MOJO applications. These small but powerful subwoofers feature DVVC (Direct Vent Voice Coil) cooling technology rapidly dissipating heat allowing MOJO Mini subwoofers to play louder and longer.


  • Memphis Audio MOJO MJM822 8" 1800 Watt Competition Car Subwoofer DVC 2 ohm Sub
  • Vented cast aluminum basket
  • Fiberglass reinforced cone
  • Stitched foam surround
  • Heat dissipating aluminum heat sink
  • 4-layer copper 2" voice coil
  • DVVC (Direct Vent Voice Coil) Cooling


  • Size (in): 8"
  • RMS Power (w): 900
  • Peak Power (w): 1800
  • Sensitivity (dB): 82
  • Magnet Size (Oz): 105
  • Mounting Depth (in): 5.75
  • Cut Out Diameter (in): 7.32
  • Voice Coil Diameter (in): 2
  • Warranty: 1

TS Parameters:

Resonant Frequency  (fs) 44.2 Hz
Mechanical Q 5.9 Qms
Electrical Q 0.6 Qes
Total Q 0.542 Qts
Sensitivity  80.86 dB
Xmax Linear 0.49 in.
Displacement 0.03 cf.
Air volume of suspension (Vas) 0.239 cf.
Moving Mass (Mms) 159.9 g
Suspension Compliance (Cms) 0.108 mmN
Effective piston area (Sd) 211.24 SqCm
Motor Strength (Bl) 11.16 TM
Impedance Series 4 ohms
Impedance parallel 1 ohms
Voice coil diameter 2 in.
RMS Power 900 Watts
Peak Power 1800 Watts
Magnet weight 105 oz
Magnet diameter 6.14 in.
Mounting depth 5.75 in.
Cutout Diameter 7.32 in.
Frame Outside Diameter 8.66 in.
Single sub sealed 0.6 cf.
Dual subs Sealed 1.2 cf.
Single sub vented 1 GROSS cf.
Port dimensions 3.5" diameter x 16"
Tuning frequency 39 Hz
Dual sub vented 2 GROSS cf.
Port dimensions 4" diameter x 9"
Tuning frequency 38 Hz

Video of RPB-KAR:
How to Set up Your RPB-KAR:

What’s in the Box:

  • Bluetooth speaker
  • Microphone
  • USB charging cable
  • Carry strap (included but optional to use it)
  • 3.5MM to 3.5MM aux cable
  • Owner manual

Description of RPB-KAR:

The RPB-KAR is our extra-large portable speaker with a built in mic input for Karaoke. The built in handles and included strap make it very convenient to travel with this speaker.

The RPB-KAR has incredible sound quality. It has a 20 Watt RMS amplifier built in and it goes surprisingly loud while maintaining a balanced sound with very defined and punchy bass.

The RPB-KAR comes with a microphone that has good sound and performance. We also added a slight amount of echo onto the mic input (The echo is NOT adjustable).  The speaker also has built in LED lights that go to the beat of the music. You can turn off the LED lights by holding the M button down which will make the battery last even longer.

USB with Powerbank!
The USB input has 2 functions. You can play music stored on a thumb drive or you can use your phone charging cable to charge your phone through the USB!

Big Battery!
The RPB-KAR uses a 7.4v/3000mAh Lithium-ion battery which supports up to 24 hours of playback at 20% volume, 12 hours of playback at 40% volume, and 4.5 hours of Playback at max volume. We also added 5 LED’s that tell you how much battery life you have left. We made sure to add this because it’s a buzzkill when you want to party and unexpectedly have less battery life then you had planned for.

Carry strap
We include a carry strap that is super useful for many situations. The strap is easy to attach or detach so when you are just listening to music in your bedroom you do not need to use it. But we included it because we thought it would be cool for school teachers who want to wear the speaker while talking into the microphone. It is also cool for karaoke because you can wear a loud LED speaker while you are singing. It is fun and useful for many applications so we included it.

Weather Resistant
This speaker is weather resistant and contains a rubber cover over the input terminals which protects the unit from rain and dust


  • Rockville RPB-KAR Loud Portable Bluetooth Speaker with Microphone!
  • Larger size speaker for deep bass frequencies and very loud overall volume
  • Built in LEDs go to the beat of the music (turn off LEDs by holding the “M” button)
  • Built in USB power bank to charge your phone or tablet
  • RMS Power: 20w
  • Uses high quality drivers and 2 passive radiator subwoofers to give amazing frequency range and sound quality
  • Uses DSP tuning along with top of the line drivers to achieve a very balanced sound
  • Bluetooth 5.0 streams Bluetooth with high fidelity and is efficient on the battery life
  • Built in TF card slot and USB playback (supports cards or sticks up to 32GB)
  • 3.5MM aux input
  • Charge Time: 4 Hours
  • 7.4v/3000mAh Lithium-ion battery supports up to 24 hours playback at 20% volume, 12 hours of playback at 40% volume, 4.5 hours of playback at max volume
  • Battery charges with included USB cable
  • 5 LED battery life indicators
  • Distortion: Less than 1%
  • Frequency Response: 45 Hz-20 kHz
  • Play, Pause, Skip Forward, Skip Back, Volume Up, Volume Down
  • Will control next song, pause, play on popular apps like Pandora, Spotify, and others
  • 33 Foot Maximum Bluetooth Range
  • The built-in microphone allows you to make and receive phone calls hands-free
  • Compatible with any Bluetooth devices such as iPad, iPhone, Laptops, Android phone, other cell phones, iPods, other Bluetooth MP3 Players
  • Built in handle for easy portability
  • Optional shoulder / neck strap for situations where you want to wear the speaker and be hands-free
  • Product Dimensions: 11.57” (L) x 4.25” (W) x 3.54” (H)
  • Product Weight: 3.85 lbs
  • Color: Black

Owner's Manual​

  • UPC:
  • 613817033057

Car Subwoofer Impedance Wiring Guide

Use our car subwoofer and amp wiring diagrams to figure out which amplifier is compatible with your subwoofer(s) and how to wire it properly.

New orders ship within 1 business day
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