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Memphis Audio MB824 8" component subwoofer with selectable 2- or 4-ohm impedance

Item # 953MB824

Memphis Audio's MB Series subwoofers are made to kick out deep, warm, old-school bass and give you maximum...

Memphis Audio's MB Series subwoofers are made to kick out deep, warm, old-school bass and give you maximum...

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3 questions - 3 answers

Item # 953MB824

In stock
$169.95 -$20.00 Price break
$149.95 each

About the Memphis Audio MB824

Bob Bihlmayer

Solid design and flexibility

Memphis Audio's MB Series subwoofers are made to kick out deep, warm, old-school bass and give you maximum flexibility in wiring your system. Their solid construction lets them handle the high power you need for solid low end, and their selectable impedance lets them fit into just about any system.

Solid design and flexibility

Memphis Audio's MB Series subwoofers are made to kick out deep, warm, old-school bass and give you maximum flexibility in wiring your system. Their solid construction lets them handle the high power you need for solid low end, and their selectable impedance lets them fit into just about any system.

Change your setup, change your settings

The MB824 8" subwoofer features spring terminals that let you use the included jumper wires to configure the sub for 2-ohm or 4-ohm impedance. This flexibility lets you get the most out of your sub amplifier, and makes it simple to connect multiple subs. Its traditional high-density paper cone—like the bass speakers on all those old records you love—combines with the sub's double-stitched folded rubber surround and steel basket to minimize distortion and give you fat, warm bass at levels up to 300 watts RMS, so you'll get plenty of punch. And since it's compatible with sealed or ported enclosures, you have even more flexibility to dial in the kind of bass response you want.

Subwoofer Wiring Diagrams

To see sample wiring diagrams for all common subwoofer/amplifier combinations, check out this informative article.

READ LESS

Product highlights:

  • 8" component subwoofer
  • selectable 2- or 4-ohm impedance
  • coated paper cone
  • folded double-stitched rubber surround
  • frequency response: 45-150 Hz
  • power handling: 300 watts RMS (600 watts peak)
  • sensitivity: 83.5 dB
  • top-mount depth: 3-5/8"
  • grille not included
  • warranty: 1 year
  • MFR # MB824

What's in the box:

  • One 8" Subwoofer
  • Rubber trim ring/gasket (installed)
  • One 4-ohm jumper wire (installed)
  • Two 2-ohm jumper wires
  • Specification sheet

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Features

Terminals: One pair of spring-post input terminals offers easy connection of single banana plugs, dual banana plugs (standard 3/4" width), pin connectors, or bare wire up to 10 gauge.

Selectable Impedance: On the opposite side of the basket from the input terminals, there are four "shorting" spring terminals. Depending on how the included jumper wires are connected to these shorting terminals, the input terminals present either a 2Ω or 4Ω load. The power handling is the same for either setting; 300 watts RMS/600 watts peak.

Sealed Enclosures: Sealed enclosures provide the most control over a woofer and provide accurate sonic reproduction, making them suitable to all types of music. Memphis Audio recommends a sealed enclosure of 0.5 ft³.

Vented Enclosures: Vented (or ported) enclosures typically provide better overall efficiency than sealed so they are suitable for use with smaller amplifiers, giving you more bass output from a given amount of power. Memphis Audio recommends a ported enclosure of 1.0 ft³ with a 3" diameter x 16½" long port, yielding a tuning frequency of 40 Hz.

Thiele Small Parameters: Some specs change depending on the impedance:

Load Presented 2Ω 4Ω
DC Resistance (Revc) 2Ω 4Ω
Resonant Frequency (fs) 48 Hz 48 Hz
Mechanical Q (Qms) 4.94 5.41
Electrical Q (Qes) 0.79 0.7
Total Q (Qts) 0.68 0.62
Sensitivity 83.5 dB 84.1 dB
Xmax 0.27" (6.86mm) 0.27" (6.86mm)
Vas 10.37 liters 10 liters
Moving Mass (Mms) 76.43 g 76.43 g
Suspension Compliance (Cms) 0.144 mmN 0.138 mmN
Effective Piston Area (Sd) 227 cm² 227 cm²
Motor Strength (Bl) 7.65 Tm 11.66 Tm

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Customer Q&A

3 questions already asked

Q
Will this work as a direct replacement for the alpine 8" sub in a 2022 ram 2500?
james  Mar 15, 2024
1 answer
A
We do not have any replacement subwoofers that will fit in the 8" subwoofer location on the 2022 Ram 2500 (all trim levels with subwoofer), James. We simply have none that fit, and your factory subwoofer in the non-Harmon Kardon models is a triple voice coil speaker. If you are looking for an improvement in bass using a small, powered subwoofer installed in a custom location like the Kicker 46HS10 below is a good alternative! https://www.crutchfield.com/p_20646HS10/Kicker-46HS10.html
bo  Mar 15, 2024 (Staff)
Q
Memphis Audio MB824 .will this subwoofer fit in the stock sub location in a 2008 Volvo C70 with Dynaudio system?
mike  Aug 02, 2023
1 answer
A
We do not have complete information on speaker fits for the Dynaudio premium system on your 2008 Volvo C70, Mike. If you are looking for a replacement for the dual subwoofers behind the seats (not the side sail panel woofers) we cannot help with any fitment information, I do apologize!
bo  Aug 02, 2023 (Staff)
Q
will this work as a direct replacement on a 2019 Toyota Tacoma with the JBL factory system?
jeff  Dec 10, 2022
1 answer
A
This Memphis Audio would not fit as a direct replacement because of depth. You would need to create an extra half inch in depth to mount that subwoofer in the factory opening.
arielle  Dec 11, 2022 (Staff)

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