Skip to content
shoppingmode
Made in the EU
delivery_truck_speed
Shipping within 2-7 business days
info
14 days for product returns
Acoustic Panel Pro.Felt E.4 Square - 14. Black, E.XL.4: 650 mm x 650 mm
verifiedStandard and XL · 14 felt colors
3D Configurator
1 / 6

Acoustic Panel Pro.Felt E.4 Square

Limit reverberation, echo and unwanted reflections while building a decorative composition on the wall. The classic square model combines certified acoustic felt with Basotect foam.

starstarstarstarstar
starstarstarstarstar
4.78 9 reviews
from 43,90 the price depends on the size
1check Felt colour
2check Size
3check Back foam color
4check Mounting method Wall

Your configuration

Felt colour
Size
Back foam color
Assembly
Wall mountingdefault
Totalfrom 43,90 
  • *Felt colour

    *Size

    *Back foam color

    Reset options

    *Thickness

    *Thickness

local_shippingDelivery in 2-7 business daysDetails
replyUp to 14 days to returnReturn policy
verified_user3-year manufacturer’s warrantyQuality guarantee
constructionInstallation in 3 simple stepsVideo (0:20)
3D Room Planner Design your room in 3D Not sure which color to choose? Order material samples →

On this page

graphic_eq

Less reverberation and echo

The panel absorbs the mid and high frequencies

square

A classic square

The modular form lets you build your own layouts on the wall

layers

Pro.Felt felt and Basotect

The two materials combine a decorative function with an acoustic one

palette

14 colors at no extra charge

The felt color doesn't affect the product's price

Acoustic data

Absorption data from 100 to 4000 Hz

The sound absorption coefficient α chart shows the panel's performance in the mid and high frequency range. The product helps reduce reverb, echo and unwanted reflections in the room.

α = 1,02at 400 Hz
α ≥ 0,86from 160 to 630 Hz
100 Hz - 4 kHzchart range
  • Less reverb and echo.
  • Fewer unwanted sound reflections off the wall.
  • Clearer conditions for conversations, work and recording.
  • Combine acoustic performance with a decorative composition.
Sound absorption coefficient α

Conditions listed with the chart: temperature 23°C, relative humidity approx. 48%. The sources do not state a sound absorption class.

Construction

A felt surface and Basotect foam

The panel uses a lightweight, modular construction that can be repeated in larger layouts.

The Pro.Felt E.4 Square acoustic panel in a square shape, split into two layers: Pro.Felt acoustic felt at the front and Basotect foam at the back
  1. Certified Pro.Felt acoustic felt

    According to the manufacturer's data, the front layer of recycled felt is 9 mm thick and meets EN 13501 with flame-retardancy class B.

  2. Basotect acoustic foam

    The rear part supports mid-frequency absorption; the product data indicates a density of about 9 kg/m³.

  3. The square-shaped module

    The form allows repeatable compositions and mixing different colors.

  4. A surface for adhesive or tape

    Mounting adhesive is not included in the set, and self-adhesive tape is available as an extra option.

Dimensions and prices

Choose the Standard or XL size

The price depends solely on the size; choosing one of the 14 felt colors doesn't change it.

E.4: 350 × 350 mm E.XL.4: 650 × 650 mm 350 mm 350 mm E.4: 350 × 350 mm 650 mm 650 mm E.XL.4: 650 × 650 mm side cross-section - mounted with the foam to the wall wall 2,5 cm Pro.Felt felt 0.9 cm foam Basotect® 3,9 cm foam 3 cm + felt 0,9 cm 5,9 cm foam 5 cm + felt 0,9 cm 7,9 cm foam 7 cm + felt 0,9 cm
VariantPrice
E.4: 350 × 350 mm 43,90 
E.XL.4: 650 × 650 mm 74,80 
straighten Need a custom size?
Ask for a free quote →

Assembly

Wall mounting in three steps

01design_services

Plan the composition

Lay the panels out as a trial and mark their positions, keeping the chosen pattern direction.

02format_paint

Choose the fixing method

As specified, use construction adhesive, which isn't part of the set, or the optional self-adhesive tape.

03check_circle

Press on and check the layout

Attach each module following the instructions of the adhesive or tape used, and inspect the composition's edges.

quizThe panel is also designed for ceiling mounting [to be added: confirmed ceiling installation instructions]

Choosing the quantity

How many panels does your composition need?

Enter the room's dimensions and purpose to get an approximate starting point.

Specification

Technical parameters

InstallationAssembly adhesive (not included) / Self-adhesive tape (optional)
Intended useCeiling / Wall
ConstructionBasotect foam / Certified acoustic felt
Place of productionEuropean Union
ManufacturerAddictive Sound

Projects

Build your own rhythm of color and geometry

The square shape and the felt palette let you match the composition to homes, offices, conference rooms, studios and public spaces.

Square modules in a symmetrical layout
A combination of sizes and colors on a larger wall
A Pro.Felt panel in an office or conference room arrangement
A detail of the felt and the Basotect back foam

From the workshop

The latest projects and short videos

Installations, behind the scenes and customer interiors - posted regularly on our profiles.

Instagram · Jun 24, 2026View post

The best home studio upgrade isn't another piece of gear - it's the room's acoustics.

Instagram · Jul 8, 2026View post

Good acoustics in the dining room means calmer conversations at the table.

Instagram · May 5, 2026View post

Acoustics isn't about the number of panels - it's about controlling sound energy in the room.
Presentation of the Addictive Sound wooden acoustic diffuser

Instagram · May 16, 2026View post

A diffuser doesn't absorb sound - it controls it.

Instagram · Jul 1, 2026View post

Acoustic treatment in the living room can look like part of the decor.
Ceiling with diffuser panels in a moody interior

TikTok · May 22, 2026View post

Sometimes the greatest potential hides in interiors with character.

Customer reviews

Customer reviews of the Pro.Felt E.4 Square Acoustic Panel

4.78/5
starstarstarstarstar
starstarstarstarstar

9 verified purchase reviews

5 star7
4 star2
3 star0
2 star0
1 star0
C
camille95 checkVerified purchase
November 14, 2025
FR
starstarstarstarstar
starstarstarstarstar

Très bonne qualité de feutre et le carré rend très bien dans le bureau. Juste un peu cher à mon goût.

L
Liam K. checkVerified purchase
November 4, 2025
EN
starstarstarstarstar
starstarstarstarstar

mounted four of these in the studio and they look superb. The felt is gorgeous and rooms sounds tighter.

R
rafal.g
October 26, 2025
PL
starstarstarstarstar
starstarstarstarstar

Świetna jakość wykonania, ekspresowa wysyłka i wszystko porządnie zapakowane polecam.

R
Robert M. checkVerified purchase
September 19, 2025
PL
starstarstarstarstar
starstarstarstarstar

Robią wrażenie na ścianie i naprawdę słychać różnicę w pokoju odsłuchowym. Powiesiłem sam bez problemu

M
maria_13 checkVerified purchase
July 31, 2025
ES
starstarstarstarstar
starstarstarstarstar

El fieltro se nota de buena calidad y el cuadrado queda muy elegante. Hay menos eco en el estudio.

Customer reviews from all language versions of the store (9)

FAQ

Frequently asked questions

Yes. The panel absorbs mid and high frequencies and reduces reverb, echo and reflections. You’ll find the α values in the Acoustic data section.

Two formats are available: E.4: 350 × 350 mm and E.XL.4: 650 × 650 mm; compare them in the Dimensions and prices section.

No. The price depends solely on the size, and all 14 felt colors are priced the same.

The specification calls for mounting adhesive or optional self-adhesive tape. The adhesive isn’t included in the set; see the Installation section.

Yes. Order the Pro.Felt sample set to compare the felt shades before choosing a color.

No. We publish the α absorption coefficient chart, but the panel hasn’t been assigned a sound absorption class.

Yes. The Pro.Felt E series is modular and designed for combining different shapes and colors in one composition.

Complete the set

Expand the composition and the interior's treatment

Combine the Pro.Felt E modules with other treatments

Addictive Sound Services

Need a complete acoustic design?

Start with a free consultation. We also offer acoustic measurements and a treatment design with 3D visualization and simulation.