Lowell Manufacturing IBOX-3 3 Cubic Foot Recessed Acoustic Backbox Enclosure for 12" Speakers

SKU: LWIBOX3 MFR: IBOX-3
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Key Features

  • Enhance your studio speaker's sound with this 3 cu.ft. acoustic backbox enclosure.
  • Achieve optimal sound accuracy with internal soundboard & batting treatment.
  • This rugged 18-gauge steel backbox eliminates unwanted resonance for clear audio.
  • Designed for 12" speakers, this backbox provides superior audio performance.
  • Simplify installation with included eyebolts and U-clips for secure mounting.
  • Trust U.S.A.-made quality with certified steel ensuring lasting studio reliability.
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Special Order?Estimated to Ship: 09/10/2025
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Lowell Manufacturing IBOX-3 Specifications

  • For Use with

    12" Speakers

  • Compatible Components

    Speakers: 12P150
    Grilles: FW-12, FW-12Q

  • Material

    Welded unitized 18-gauge steel with damping to eliminate acoustical and mechanical resonance

  • Finish

    Black powder epoxy

  • Volume

    3 Cubic Foot

  • Acoustical Treatment

    Sound board and 1.5 in. batting

  • Mounting & Installation Aids

    8-32 screw retaining U-clips, 1/4-20 forged eyebolts

  • For Grille Type

    Screw-Mount

  • Compliance & Certification

    Made in U.S.A.
    Certified U.S. steel

  • Dimensions (WxDxH)

    18 x 12.11 x 23.75" (457.20 x 307.59 x 603.25mm)

About Lowell Manufacturing IBOX-3

Take your audio experience to the next level with the IBOX-3 3 Cubic Foot Recessed Acoustic Backbox Enclosure, meticulously engineered for distributed speaker systems that demand superior sound reinforcement. Crafted by Lowell Manufacturing, a leader in high-quality audio solutions, this durable enclosure is the epitome of innovation and functionality in the realm of professional audio equipment.

The IBOX-3 is designed to seamlessly integrate with your 12-inch speakers, offering a stylish and functional recessed installation option that enhances the aesthetic of any space. Whether you're setting up a sophisticated home theater or outfitting a commercial venue, this backbox enclosure ensures your speakers are not only protected from environmental factors but also positioned to deliver the best possible acoustics.

Constructed with the perfect blend of materials, the IBOX-3 combines the robustness of a large metal enclosure with the superior acoustic properties of 3/4" plywood. This innovative design allows your 12" speaker to operate at its optimal loading level, significantly improving low-frequency response and overall sound clarity. The result is a rich, full-bodied audio output that truly stands out from the competition.

With the IBOX-3, you're not just installing a speaker enclosure; you're investing in a high-quality, functional piece of audio equipment that elevates the listening experience. Choose the IBOX-3 for a clean, professional look and unparalleled acoustic performance that only Lowell Manufacturing can deliver.

Lowell Manufacturing IBOX-3 Features

  • Rigidly braced fabrication of welded, unitized heavy 18-gauge steel with damping to eliminate acoustical and mechanical resonance
  • Internal volume: 3 cu.ft
  • Inner walls lined with .5" thick acoustical fiberboard to prevent sympathetic vibrations within the expanse of the cavity
  • Inside surfaces lined with 1.5" premium acoustic lining (1.5 lbs. density rating) to absorb undesirable resonance in high frequency range
  • Grille mounting flange projects .42" for efficient installation in plaster, poured concrete, sheetrock or suspended tile ceilings. Includes 8-32 screw retaining U-clips to accept Lowell grille No. FW-12 or FW-12Q (with ported subplate)
  • Four 1/4-20 forged eyebolts in rear
  • Made in the USA with certified US steel
  • Black powder epoxy finish

Warranty Information

This product has a limited warranty of 12 months.

Key Features

  • Enhance your studio speaker's sound with this 3 cu.ft. acoustic backbox enclosure.
  • Achieve optimal sound accuracy with internal soundboard & batting treatment.
  • This rugged 18-gauge steel backbox eliminates unwanted resonance for clear audio.
  • Designed for 12" speakers, this backbox provides superior audio performance.
  • Simplify installation with included eyebolts and U-clips for secure mounting.
  • Trust U.S.A.-made quality with certified steel ensuring lasting studio reliability.

What's in the box:

  • Lowell Manufacturing IBOX-3 3 cu.ft Recessed Acoustic Backbox Enclosure
  • Rear Transformer Mounting Plate
  • 4x 1/4-20 Eyebolts
  • Lowell Manufacturing 1 Year Limited Warranty