Acousti-Slab 1" Acoustic Studio Foam Panel

Advanced Acoustics 1" Acousti-Slab Acoustic Foam Treatment Panel

The Advanced Acoustics Acousti-Slab 1" is a 25mm open-cell polyurethane acoustic foam panel, measuring 2ft × 4ft (610mm × 1220mm). The panel achieves NRC 0.55 (Sound Absorption Class D), providing effective absorption across the mid and high frequency range. Each panel covers 0.74m² (8sqft). The Acousti-Slab is available in two formats: unmounted bare foam, and mounted to a 6mm MDF substrate.

The unmounted panel can be fixed directly to the wall surface using contact adhesive, trimmed to size, or wrapped in open-weave fabric for a more finished appearance. The mounted panel is pre-fixed to 6mm MDF and can be fitted with mirror plates for direct wall hanging without adhesive. Absorption increases with frequency: 0.20 at 250Hz, 0.41 at 500Hz, 0.72 at 1kHz, 0.93 at 2kHz, and 1.06 at 4kHz. Available in Mid Grey and Dark Grey. Manufactured in the UK.

Applications

Home studios and recording spaces — entry-level panel treatment.
The 25mm Acousti-Slab provides effective mid and high frequency absorption suited to home studios where high-frequency flutter echo and reverberation are the primary acoustic problem. The large 2ft × 4ft panel format reduces the number of pieces required to cover a given wall area relative to smaller tile formats, making installation faster and more straightforward. The unmounted format can be trimmed on site to fit non-standard dimensions or wrapped in open-weave fabric to suit the room aesthetic. Use the Coverage Calculator to determine the number of panels required. Where stronger low-mid frequency absorption is needed, the 2" Acousti-Slab (50mm) provides significantly improved 250Hz performance.

Vocal booths and isolation rooms.
The Acousti-Slab 1" provides effective absorption at the frequencies most critical for vocal recording — 0.72 at 1kHz rising to 0.93 at 2kHz and 1.06 at 4kHz — reducing the coloration introduced by room reflections and producing a cleaner vocal capture. The unmounted panel format suits vocal booth installations where panels need to be fitted around irregular surfaces or trimmed to specific dimensions. The mounted-to-MDF option provides a ready-to-hang panel that can be positioned and repositioned using standard picture-hanging fixings.

Custom acoustic installations — fabric wrapping and bespoke sizing.
The unmounted Acousti-Slab is the base material for custom fabric-wrapped acoustic panels. The foam can be wrapped in any open-weave fabric — the fabric must allow air to pass through to maintain acoustic transparency — and stapled or adhered to a backing board to create a finished panel suited to residential, commercial, or studio environments. Custom sizes are available on request. The flat-face slab format provides a clean, even surface for fabric wrapping that profiled tiles do not.

Product Benefits

NRC 0.55 / Sound Absorption Class D — effective mid and high frequency absorption.
The 25mm foam core achieves NRC 0.55 (Class D), with absorption increasing from 0.20 at 250Hz to 1.06 at 4kHz. At 25mm, low-frequency absorption is limited — 0.20 at 250Hz — making this panel most effective at controlling mid and high frequency reflections. For rooms requiring stronger low-mid absorption, the 2" Acousti-Slab (50mm) is the appropriate upgrade within the range.

Unmounted and mounted-to-MDF formats.
The unmounted panel is bare foam suitable for direct adhesive fixing, trimming, or fabric wrapping. The mounted panel is pre-fixed to a 6mm MDF substrate. The mounted format is appropriate where a rigid, repositionable panel is required without the use of contact adhesive. Both formats are available in Mid Grey and Dark Grey.

Specification and compliance.
30kg/m³ foam density. Crib 5 and Schedule 1, Part 1 of the Furnishings and Furniture (Fire)(Safety) Regulations 1988 (amended 1989). Panel size 610mm × 1220mm × 25mm (2ft × 4ft × 1"). 0.74m² (8sqft) coverage per panel. 0.9kg unmounted, 4.5kg mounted. Mid Grey and Dark Grey. Custom sizes available on request. Manufactured in the UK and shipped uncompressed from stock.

Installation

Unmounted panels — adhesive fixing.
Apply Advanced Acoustics High Strength Contact Adhesive to both the back of the panel and the wall surface. Apply a band of adhesive around the perimeter and 50–75% coverage of the remaining surface area; repeat on the wall. Allow to become touch-dry before bringing surfaces together — contact adhesive bonds on contact, so position the panel carefully before pressing it to the wall. The adhesive is solvent-based; ensure adequate ventilation throughout installation.

Unmounted panels — demountable installation.
For a temporary or demountable installation, mount the panel onto 6mm MDF or plywood sheet and hang using D-rings and picture hooks. Four mirror plates per panel for ceiling-mounted installations. This allows panels to be removed and repositioned without damage to the wall surface.

Mounted-to-MDF panels.
Fix mirror plates to the wall at the appropriate centres using suitable fixings for the wall substrate. Hang the panel on the mirror plates. The mounted panel can be removed and rehung without tools.

Frequently Asked Questions

I want to improve my home studio recordings — is the Acousti-Slab the right starting point?

If your room produces audible echo, flutter echo when you clap, or your recordings have a roomy quality that is difficult to mix out, the Acousti-Slab is an effective solution. The most impactful first positions are the wall directly behind the microphone and the ceiling above the recording position. If the room also has a heavy or muddy bass quality, corner bass traps should be added alongside the panels.

Will fabric-wrapping reduce the acoustic performance?

Only if the fabric is not acoustically transparent. Any open-weave fabric through which air passes freely will not meaningfully reduce absorption — the sound passes through the fabric and reaches the foam behind it. Dense, tightly woven fabrics block airflow and will significantly reduce the panel's performance. Hold the fabric up to a light source — if air passes freely through the weave, it is suitable.

What is the difference between the 1" and 2" Acousti-Slab?

The 2" panel is 50mm deep and achieves NRC 0.85. The 1" panel is 25mm deep and achieves NRC 0.55. The key difference is mid-frequency performance: the 2" delivers 0.45 at 250Hz versus 0.20 for the 1", and 0.94 at 500Hz versus 0.56. For recording studios and critical listening environments where low-mid frequency reverberation is as much a problem as high-frequency flutter echo, the 2" is the standard recommendation. The 1" is appropriate where the primary problem is high-frequency brightness and budget is a constraint.

Is this suitable for a rented space where I cannot damage the walls?

Yes, using the MDF-mounted version. Fix mirror plates to the wall at the panel centres, hang the panels, and remove them cleanly at the end of the tenancy. Holes from mirror plate fixings are small and easily filled. If even small fixings are not permitted, panels can be mounted onto a freestanding frame that requires no wall contact at all.

What if my room still sounds poor after installing the panels?

All products carry a 30-day money-back guarantee. If the improvement is less than expected, the most common cause is insufficient coverage or panel placement that misses the primary reflection points. Contact us before returning — our team can advise on layout adjustments that often resolve the issue without additional product.

The Technical Details

Performance Data