Technical Specs


Achieve an even decay time from low to high frequencies while providing the necessary absorption to flatten the frequency response

Our Alpha Series panels are made with rigid fiberglass absorption material wrapped in your choice of fabric, and finished with an attractive plate which has a mathematical sequence of slots for either one-dimensional scattering/diffusion or two-dimensional scattering/diffusion

Panel core made from 100% recycled materials, environmentally friendly, no formaldehyde or urea formaldehyde



Rigid fiberglass provides twice the low end absorption over similar foam-based products.


Thin face plate has mathematical sequence of slots for spatial diffusion, but also allows low frequency waves to pass through to the fiberglass panel for low end absorption.


Square = 10lbs | Rectangle = 20lbs


1.05 (versus foam products where NRC = 0.4)


ECOSE® technology absorption material

LEED  certified Columbia Forest Products (made in the USA)

Purebond formaldehyde-free technology

Quality hand-made construction and craftsmanship

Standard Sizes

Square 23″x23″

Rectangle 23″x45.5″

Suggested Placement

The 6A Alpha Panel can be used on the front or back walls and rear sidewalls to keep the reverberation better mixed and the room lively.

It can be utilized on the rear sidewalls or behind dipole speakers to round off sharp reflections.

Anywhere in a tracking room or other large spaces, helping spread out the energy evenly across the whole room.

Add freestanding supports on rectangular (23″ x 45.5″) Alpha Panel and position the Alpha plate outward for diffusion or turn the fabric side outward for broadband absorption. Also allows for flexible placement in early reflection points or straddling corners as a bass trap.

The tests were carried out in the large reverberation room at the University of Salford (Manchester England). The room has been designed with hard surfaces and non-parallel walls to give long empty room reverberation times with uniform decays.

A Mount results Corner mount results


All panels are available in our 9 standard, quality GIK Acoustics fabric options at no additional charge.




You may select any of the following 9 stocked Guilford of Maine colors right off the web site.


Standard 9 GOM FR701

Upgrade the finish of your panels to Guilford of Maine FR701 or Anchorange fabrics for a nominal charge per panel.

Panel SizeAdditional charge per panel
Impression Series or Alpha Series square panel (24” x 24”)$15.00
Impression Series or Alpha Series narrow panel (12” x 48”)$15.00
Impression Series or Alpha Series rectangle panel (24” x 48”)$25.00
Corner CT Alpha Bass Trap$20.00
PIB (Portable Isolation Booth)$55.00

See all Guilford of Maine FR701 colors here.

Contact us for a quote on any other FR701, Anchorage, or other GOM fabrics.

Order a color swatch book with fabric samples for $15.00



1D option

Uses a mathematical sequence in a column that extends the length of the panel. The vertical slats of the 1D allow sound energy to be scattered in a horizontal plane.

2D options

2D (a) has a pattern of dots and dashes
2D (b) has a pattern of dashes

Uses a sequence of columns and rows with variable spacing that provides horizontal and vertical scattering of sound. Additional $20 each for Square panels and $30 each for Rectangle panels.