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JBL LSR4312SP Subwoofer - Single – No Longer Available

Active subwoofer with DSP-enabled Room Mode Correction

Product Description

The JBL LSR 4312SP Powered Subwoofer provides powerful bass performance extending frequency response of the system into the 20Hz region.  When networked with LSR4300 Studio Monitors, the LSR4312SP Sub provides revolutionary capabilities including JBL RMC™ Room Mode Correction technology to ensure accurate mixes in any room.


  • 450 Watts Amplification; 12” Low Frequency Transducer with magnetically-shielded Neodymium motor structure
  • RMC™ Room Mode Correction system analyzes and automatically compensates for room modes that can give a misleading impression of low frequency content at the mix position *
  • Six balanced XLR inputs with selectable +4dBU / -10 dBv sensitivity
  • AES/EBU and S/PDIF Digital plus analog LFE inputs
  • Comprehensive Bass Management System for professional surround sound production *
  • Harman HiQnet™ network protocol allows all settings to be controlled from the LSR4300 wireless remote control or LSR4300 Control Center Software 

* When used in a system with LSR4328P or LSR4326P Studio Monitors


  • Frequency response: -6 dB: 27 Hz - 250 Hz
  • SPL / 1m (continuous/peak): 116 dB / 125 dB
  • Transducers: Low Frequency Model: 12 in (300mm) 432G - Self-shielded Neodymium - Motor Structure
  • Sensitivity +4 dBU, -10 dBV: 94 dB / 1 m
  • Amplification: 450 W
  • Digital processing: 24 bit/96 kHz
  • Analog inputs: L, C, R, L Surround, R Surround, LFE: 6 XLR , two .25", Balanced, +4 dBU, -10 dBv, LFE +10 dB Gain
  • Digital inputs: AES/EBU XLR IN, OUT: S/PDIF RCA IN/OUT
  • Data connections: Harman HiQnet™ Network, USB
  • Weight: 29.5 kg (66 lb.)
  • Dimensions (H x W x D): 502 mm x 406 mm x 489 mm (19.75 x 16 x 19.5")

Product Specifications

Condition New
Active or Passive Active
Monitor Application Sub
Number of Speakers Single

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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.