Acoustic Foam Bass Traps — UK Made by eFoam
Control low frequency reverberation in studios, home theatres and listening rooms
Acoustic foam tiles do a good job of controlling mid and high frequency reflections but they cannot touch bass. Low frequencies have much longer wavelengths and carry far more energy, which means they pass straight through standard tiles without being absorbed. Instead they accumulate in room corners, creating standing waves and bass nodes that make it very difficult to judge how your recordings will actually sound on other speakers.
Bass traps are specifically designed to address this. Placed in room corners, they absorb low frequency energy before it can build up and cause problems. We manufacture all of our bass traps here in the UK at our factory in Bilston, West Midlands, to exacting British standards in compliance with UL94 HF1 Classification and the requirements of Schedule 1, Part 1, of The Furniture and Furnishings (Fire) (Safety) Amended Regulations 1989.
We offer individual bass traps in 24 inch and 36 inch lengths, flat or convoluted, plus our large Emaxi trap for professional setups. We also supply complete corner kits that include everything needed to treat a room corner properly in one order. For a full acoustic treatment, combine bass traps with our acoustic foam tiles on walls and ceilings. For our premium professional range, see our Sonic Acoustics bass traps.
- Greatly assist in reducing reverberation, reflections and flutter echoes at low frequencies.
- Very efficient low frequency absorber & maximum absorption in the least space.
- Manufactured from high quality acoustic foam to exacting British standards, UL94 HF1 classification.
- Comply with Schedule 1, Part 1, of The Furniture and Furnishings (Fire) (Safety) Amended Regulations 1989.
- Wedge design allows easy placement in corners or on walls. Can be stacked, grouped or placed edge-to-edge for greater absorption.
- Can be installed using our spray adhesive.
Looking for our Professional Sonic Acoustics Bass Traps?
Our Sonic Acoustics professional bass trap range is available in 12 inch and 24 inch sizes with matching corner kits, manufactured to the same exacting British standards with UL94 HF1 Classification. View the full Sonic Acoustics range here.
Technical info |
Acoustic data |
Acoustic Foam Bass Trap Technical Specifications
All eFoam bass traps are manufactured from the same combustion modified conventional polyether polyurethane foam used in our acoustic tile range, tested to British Standards. The thicker profile of the bass trap increases low frequency absorption compared to standard acoustic tiles.
Physical Properties
Physical properties are measured using test methods described in the BS4443 series and BS EN ISO 845.
| Property | Specification |
| Nominal piece density range | 23.5 – 25.5 kg/m³ |
| Nominal hardness range | 110 – 150 N |
| Nominal tensile strength | 70 kPa min. |
| Nominal elongation at break | 120% min. |
| Foam type (BS3379) | CMB — Combustion Modified Conventional Slabstock |
| Nominal classification (BS3379) | A |
Flammability & Fire Safety
- Complies with the requirements of Schedule 1, Part 1, The Furniture and Furnishings (Fire) (Safety) Amended Regulations 1989.
- Under Writers Laboratories — UL94 HF1 Classification.
- Automotive: FMVSS 302 (Self extinguishing).
Specification last reviewed March 2026. Simply Foam Products Ltd reserves the right to update product data without prior notice.
Acoustic Foam Absorption Data
The chart below shows the sound absorption coefficient of our acoustic foam across the frequency spectrum. Bass traps perform most significantly in the lower frequency range due to their increased thickness, the 36 inch trap absorbs noticeably more low frequency energy than the 24 inch version.
For detailed acoustic performance data for a specific project, please contact our team.
Acoustic Bass Trap Foam Frequently Asked Questions
Questions we get asked regularly about bass traps and low frequency acoustic treatment. If yours isn't here, get in touch, our team have been dealing with acoustic problems for over 20 years and are always happy to help.
What are acoustic bass traps and what do they do?
The simplest way to think about it is this: acoustic tiles deal with the sound you can hear bouncing off walls such as the echo, the flutter, the harsh reflections that make a room sound live and unpredictable. Bass traps deal with a completely different problem. Low frequencies don't bounce in the same way, they accumulate. They build up in room corners and create areas of excessive bass and areas of almost no bass, sometimes within a metre of each other. This is called a bass mode or standing wave, and it's the reason a mix that sounds great in one spot in a room can sound completely different two steps to the left. Bass traps absorb that low frequency energy at the corners before it can create those problems.
Where should bass traps be placed in a room?
Always start in the corners, that's where low frequency energy concentrates. The floor-to-ceiling corners (the long vertical edges of the room) are the most important. Stack bass traps vertically along those corners, as high up as you can practically go. The ceiling corners where the walls meet the ceiling are the next priority, and this is where the corner kits come in, they include a corner cube that bridges the join between the vertical and horizontal traps neatly. If you only have a limited number of traps and have to choose, put them behind your listening position first. The front corners of a room are typically less problematic than the rear ones.
What size bass trap do I need, 24 inch or 36 inch?
Both work well, and the honest answer is that more is better, so if budget allows, go for the 36 inch. The extra length means more foam depth which translates to better absorption of the very lowest frequencies. In a well-treated professional recording studio you'd typically see floor-to-ceiling 36 inch traps in every corner. For a home studio or listening room, 24 inch traps are a significant improvement over nothing and are the more practical starting point. Our Emaxi traps at 610 x 610 x 915mm are worth considering if you have a real problem with bass, they're noticeably more effective than the standard sizes.
What is the difference between flat and convoluted bass traps?
The flat bass traps have a smooth face and do what they say, they absorb low frequencies through the full depth of foam. The convoluted version has the egg-crate profile on the face, which adds a layer of mid and high frequency absorption on top of the bass absorption. If your room has noticeable issues at both ends of the spectrum, boomy bass and harsh upper frequencies, the convoluted traps can help tackle both at once. For pure bass control they perform comparably. The flat bass traps are slightly better value if bass is your only concern; the convoluted bass traps are worth the extra if you want more all-round treatment.
Do I need bass traps if I already have acoustic foam tiles?
If you're just trying to make a room less echoey for podcasting, video calls or general recording, tiles alone will make a very noticeable difference and bass traps may not be essential. But if you're mixing music or doing any work where bass accuracy matters, tiles on their own won't be enough. The bass problem will still be there you just won't be able to hear the reflections from it as clearly because the tiles have cleaned up the mid and high end. In a mixing environment that's actually worse, because the room sounds better but the low end is still misleading you. For serious audio work, you need both.
How do I install acoustic foam bass traps?
The wedge profile on our bass traps is designed to sit naturally into a room corner with the angled face pointing out into the room. The most reliable fixing method is spray contact adhesive, spray both the back of the trap and the wall surface, let both tack for about a minute, then press firmly. For temporary setups or rented spaces, heavy-duty hook and loop tape can work on smooth painted surfaces though it won't hold as reliably long-term. If you're using a corner kit, fit the vertical traps first, then the horizontal ceiling traps, then position the corner cube at the join. We supply spray adhesive directly if you need it.
Why choose eFoam for your bass traps?
We've been manufacturing acoustic foam products in the UK for over 20 years. Our bass traps are made at our own factory in Bilston, West Midlands, every one of them. Not imported, not outsourced, not rebranded from a supplier overseas. That means we can stand behind the quality and the fire safety compliance without any uncertainty.
When you buy from eFoam you're buying direct from the manufacturer. No retail markup on top of a wholesale price, just the product at a fair price, shipped free the next working day. Our team are genuinely knowledgeable about acoustic treatment and are happy to advise on which products are right for your room. Call us on 0800 0439990 (Monday to Friday, 8am–5pm) or send us a message.
Not sure which bass trap is right for your setup? Order a sample first, it lets you check the density before committing to a full order.
