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MB4 Modular Bass Module

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Bass for indoor systems.

Compact low-frequency loudspeaker designed primarily to provide bass augmentation for Bose Panaray and DS systems in small to medium-size indoor permanent installations. It can also be used as portable sound reinforcement.


  • Unique 4 x 5.25" (133 mm) high-excursion woofer configuration provides deep bass to 35 Hz with fast transient response
  • Modular design allows stacking of multiple enclosures for increased maximum sound levels
  • Integrated suspension inserts allow easy permanent installations with optional rigging accessories

Order today and dramatically enhance your low end.


MB4 Modular Bass Module Specifications:

System Performance
  • Frequency Response: (+/-3 dB)1 45 Hz - 310 Hz
  • Frequency Range :(-10 dB)1 35 Hz - 350 Hz
  • Nominal Dispersion: Omni-directional below 200 Hz
  • Recommended High-Pass Filter: 30 Hz high-pass filter
  • Overload Protection: PTC/Lamps (2)
  • Long-Term Power Handling: 2 200 W (800 W peak)
  • Sensitivity: (SPL / 1 W @ 1 m)3 87 dB SPL
  • Maximum SPL @ 1 m4: 110 dB SPL (116 dB SPL peak)
  • Nominal Impedance: 8 Î
  • Driver Compliment: Four (4) 5.25" (133 mm) low-frequency drivers
  • Enclosure: High-density wood composite with solid color PVC laminate, high-impact polypropylene end caps
  • Grille: Powder-coated steel grille
  • Environmental: Indoor use only
  • Connectors: Two (2) parallel-wired NL4 Neutrik Speakon connectors
  • Suspension / Mounting: Four (4) M8 threaded inserts (2 top, 2 bottom)
  • Dimensions: 26.7" H x 10.2" W x 18.2" D (678 mm x 260 mm x 463 mm)
  • Net Weight: 45 lbs (20 kg)
  • Shipping Weight: 62 lbs (28 kg)
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  • Free Standard Ground shipping (48 contiguous states, some overweight and Used/Vintage items excluded).
  • Orders placed before 3 p.m. ET usually ship the same business day.
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