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JBL MRX528S – No Longer Available

Dual 18” portable subwoofer system

Product Description

The JBL MRX528S is a portable dual 18" subwoofer speaker system.


  • Dual 18", 2044H drivers for extended low-frequency output
  • Large vents for reduced distortion
  • Vertical orientation for convenient ground stacking
  • Tough DuraFlexT enclosure finish


  • Power rating: 1000 W / 2000 W / 4000 W
  • Frequency range: 35 Hz - 250 Hz
  • Dimensions (H x W x D): 1095 mm x 535 mm x 700 mm (43 x 21 x 27.5")
  • Sensitivity: 97 dB SPL; 103 dB SPL
  • Frequency response: 40 Hz - 250 Hz
  • Nominal impedance: 4 ohms
  • Rated maximum SPL: 133 dB SPL (139 dB SPL)*Calculated on half space condition
  • Coverage pattern: 70º x 70º nominal
  • Weight: 55 kg (121 lbs.)
  • Low frequency driver: 2 x JBL 2044H 457 mm (18") woofers

Product Specifications

Condition New
Active or Passive Passive

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I would like to thank VK for the wonderful sales assistance, service and prices. This was my first purchase with you and it won't be my last. I only wish I'd discovered you years ago!
Matthew R.
I had two Grammy wins this year - Ray LaMontagne & Carolina Chocolate Drops. Both made with help from Vintage King!
Ryan F.
In almost 20 years in Pro audio buying, never did I receive a unit so well packed and exactly as described. Works flawlessly. The whole process has been so smooth. I will never hesitate to do business with you guys in the future and will recommend you to everyone I know.
Martin C.
This was my first experience buying something from Vintage King (although I surf the "used" categories on the website frequently!), and, despite being on the other side of the world, I had absolutely no trouble and everything went very smoothly.
Phil T.