GIK Acoustics Monster Bass Traps black burgundy
GIK Acoustics Monster Bass Traps black burgundyGIK Monster Bass Traps in Home TheaterGIK Acoustics in Control roomLost Ark - Control RoomGIK Monster Bass Traps OnlineMastering StudioGIK Acoustics Cloud Mount BracketsZenPro Audio GIK AcousticsOverture Audio's Studio C
Photo Credit: Larry Maciag, Fulcrum Design+Build, LLC.

GIK Acoustics Monster Bass Trap with FlexRange Technology



  • $0.00

Product Description


  • GIK FlexRange Technology Logopatent pending FlexRange Technology options
  • our thickest panel – standard size: 24.25” x 48.5” x 7.25”
  • weight: FULL RANGE = 19 lbs  |  RANGE LIMITER = 21 lbs
  • professionally constructed  two-frame system and built-in air gap
  • easy wall and corner installation using wire integrated in the back like a picture frame
  •  employs ECOSE® technology absorption material and is manufactured with LEED certified Columbia Forest Products (made in the USA)  formaldehyde-free technology
  • optional built-in Scatter Plate for an even balance of absorption, diffusion, and scattering
  • free standing options available with metal stands or boom stand brackets (boom stand not included)
  • easy to install on ceiling with optional Cloud Mounting Bracket©
  • can be custom sized to fit your specifications
  • available in our 9 standard, quality GIK Acoustics fabric options
  • additional Guilford of Maine fabric choices available
Monster Bass Traps in Home Studio

Monster Bass Traps in Home Studio

The Monster Bass Trap with FlexRange Technology is our most effective panel, raising the bar for bass traps. Measuring in at a whopping 7.5” thick, the design of the Monster Bass Trap with FlexRange Technology allows it to be used in multiple quantities to absorb as much bass as possible without over absorbing the high end, which leaves life inside the room.

With the Monster Bass Trap with FlexRange Technology, low end becomes clearer making it easier mix. No more guessing on bass levels during mix down. No more hassles trying to clean up nasty nulls and spikes that are common in all rooms. With new certified lab tests, the Monster Bass Trap with FlexRange Technology has a rating of 24 Sabins per unit – 50% more effective than our 244 Bass Trap with FlexRange Technology. There is no other product on the market that even comes close.

Simulated sound waves strike the front FlexRange Technology

Simulated sound waves strike the FRT Membrane

When combined with our proprietary RANGE LIMITER membrane system, the Monster Bass Trap with FlexRange Technology  absorbs up to 50% more low end (below 60Hz) and retains 75% more high end (from 400Hz and above) versus the broadband FULL RANGE option.

While many commercially available products are simple fabric-wrapped panels, the Monster Bass Trap with FlexRange Technology is precision engineered and manufactured to exacting standards.  We begin with a two-frame system that allows sound to travel behind the panel for greater low-frequency absorption.  GIK Acoustics uses high-quality fabrics as our standard options as opposed to cheap burlap or microsuede.  Our materials are Greensafe which means GIK products are easy on air quality for your room, the environment, and your budget.

The Monster Bass Trap with FlexRange Technology hangs truly flush on the wall using an integrated wire on the back and can easily be mounted straddling corners (recommended) or as a cloud on the ceiling.

Custom Monster Bass Traps in Norwegian Grammy Winner Espen Lind's Oslo Studio

Custom Monster Bass Traps in Norwegian Grammy Winner Espen Lind’s Oslo Studio designed by HdAcoustics

Click here for full Riverbank Acoustical Laboratories results: Monster Bass Trap with FlexRange Technology FULL RANGE and Monster Bass Trap with FlexRange Technology RANGE LIMITER.

RAL Chart for Monster Full Spectrum and Limiter


Cross Section illustrates how Scatter Plate is built-in to products

Cross Section illustrates how Scatter Plate is built-in to products

Broadband treatments offer great performance with an attractive price and when coupled with diffusion and scattering, can give your room a completely balanced sound throughout, without over-dampening high frequencies.

The GIK Acoustics built-in Scatter Plate option allows even decay time from low to high frequencies while providing the necessary space for absorption to flatten the frequency response. Read more about the new GIK Acoustics Scatter Plate here.

After adding GIK Acoustics Monster Bass Trap with FlexRange Technology to your cart, you can then select Scatter Plate from the Diffusion Products menu and have them built into your Monster Bass Trap with FlexRange Technology for only $49.00 per panel.


GIK Acoustics Boom Stand Brackets sqInstead of mounting the panel on the wall, we offer our Boom Stand Brackets. Installing these brackets on the panel allows it to attach to any boom stand turning your Monster Bass Trap with FlexRange Technology into a gobo or a portable vocal booth. For only $12 each you can add increased flexibility to our acoustic panels. (Boom stand not included.) Click here to add boom stand brackets to your order.


GIK Acoustics Custom Metal Stands sqAnother alternative that adds flexibility is our Custom Metal Stands. Our metal stands are modern, contemporary and powder coated for greater durability. Complete your GIK Acoustics order with our free standing custom metal stands. Looks great and provides flexibility! Click here to add custom metal stands to your order.






Standard 9 GOM FR701

You may order any of these 9 stocked Guilford of Maine colors right off the web site or contact us for a quote for any of the other Guilford of Maine FR701, Anchorage or other fabrics.

See all Guilford of Maine FR701 colors here.

Order a color swatch book with fabric samples for $15.00

Bob Katz of Digital Domain


“The GIK Acoustics Monster Bass Trap was the perfect trap to reduce a resonance that I detected in studio B.”

Bob Katz
Mastering Engineer
Digital Domain Website



GIK Acoustics Monster Bass Trap Product Video

    This video illustrates the features of the GIK Acoustics Monster Bass Trap. Descriptions of size, color options, placement and construction are presented.

Mounting Bass Traps in Corners Video

    This video provides instructions on mounting GIK Bass traps acoustic panels straddling corners.

Bass Traps and Understanding Low Frequencies

    This video examines how low end frequencies move in a room and how bass traps can solve these problems.

FlexRange Technology

FlexRange Technology is GIK Acoustics’ unique, patent pending system for providing the best in bass trapping and low end absorption.  Backed by research, development and testing, FlexRange Technology encompasses our proprietary bass trap design while offering customers a true choice to control the frequency range that’s absorbed.  Without a membrane, bass traps are broadband.  With a membrane, bass traps absorb even lower frequencies while the membrane has less effect absorbing upper frequencies.

FULL RANGE - The Full Range option is broadband in nature maximizing low end and upper frequencies to give a true broadband range of absorption. Full Range is an excellent option at controlling low end frequencies and is the preferred choice for early reflection points or when upper frequencies need 100% absorption.

RANGE LIMITER – The second option has a built-in frequency range limiter. This option includes a membrane system which starts absorbing at a lower frequency but also has a cut off starting around 400Hz. Using the Range Limiter option ensures maximum low end absorption while retaining nearly 100% of the upper frequencies within your room. Ideally used when no upper frequency absorption is required/desired. The Range Limiter option is an ideal solution to make a small room sound larger, keeping life within the room.  Additional $20 per panel for Range Limiter option.

Simulated sound waves strike the front FlexRange Technology

Simulated sound waves strike the front FlexRange Technology


FlexRange Technology Test Results

GIK Acoustics Monster Bass Traps with FlexRange Technology – Full Range


GIK Acoustics Monster Bass Traps with FlexRange Technology – Range Limiter


GIK Acoustic Panels are tested and certified by the Riverbank Acoustical Laboratories (RAL) Sound Absorption and Sound Absorption Coefficients by the Reverberation Room Method ASTM C 423-02/NVLAP 08/P03 GIK Acoustics panels submitted to two standard acoustic test methods: ASTM “A” and “J” testing. For “A” testing the acoustic panels are placed all together flat against a surface and tested. “A” testing is the standardized testing method for the manufacturing industry. “J” testing simulates the recommended mounting of the product by the manufacturer. GIK tested two set-ups: 1) panels straddled in corners 2) panels spaced off the wall and mounted on stands. To our knowledge GIK Acoustics is the only company to provide data on both testing methods.

Riverbank Acoustical Laboratories (RAL)TM has been accredited under the National Voluntary Laboratory Accreditation Program (NVLAP). The National Institute of Standards and Technology (NIST) administers the NVLAP program. NVLAP is comprised of a series of laboratory accreditation programs, which includes specific calibration and/or test standards and related methods and protocols assembled to satisfy the unique needs for accreditation in the fields of testing or calibration. NVLAP accredits public and private laboratories based on evaluation of their technical qualifications and competency to carry out specific calibration or tests.
Riverbank Acoustical Laboratories (RAL)TM test methods adhere to ASTM standards. Formerly known as the American Society for Testing and Materials, ASTM International provides standards that are accepted and used in research and development, product testing, quality systems, and commercial transactions around the globe.