Ref: SKAB003

A versatile sound absorbing panel with three mounting positions. 100 x 60cm panels (thickness of 70mm).

Pack with 2 units to cover up to 1.20m2 or 2 corners.

ZHFR acoustic foam in charcoal grey, self-extinguishing, E-d0 (EN 13501-1).

VAT included


What are they?

KOTKA panels are next-generation sound absorbers with a unique and innovative design that allows to be used as standard sound absorbers or as bass traps; they have three mounting options: two flat positions and one angular position. Their studied shape creates different air cavities, plotted to obtain an extraordinary acoustic performance. When mounted in the angular position, the variable air cavity formed converts the Kotka panels into spectacular bass-trap absorbers.

They are manufactured with our special ZHFR acoustic foam, with an improved porosity coefficient to obtain the best acoustic performance in the market.

* Note: Product available on request -> delivery time: 10 days *

... inspiration

Its design is inspired by the flight profile of the Iberian golden eagle, in homage to this endemic bird which inhabits the peninsula.

What is the application used for?

It is used as versatile soundproofing treatment for rooms that require both acoustic and aesthetic results.

They offer the option of using a single product as an absorbing panel, to control early reflections and reverberation time at medium - high frequency, or as a bass trap for controlling low frequencies.

Absorption treatment for: control rooms, recording rooms, rehearsal rooms, radio/TV broadcasting studios, home cinema...

What is their format?

  • Panels measuring: 600mm x 1000mm x thickness of 70mm
  • Packages of: 2 units. - area coverage = 1.20 m2 or 2 corners.
  • Normal packaging: 60cm x 100cm x 13cm (0.08m3 / 2 Kg.)

Mounting positions

The following picture shows the three Kotka panel mounting options.

Kotka - positions

Physical properties

Technical Drawing

Description: Broadband acoustic absorber
Material: ZHFR acoustic foam
Composite: Flexible open-cell polyurethane
Colour: Charcoal grey
Density: 28 Kg/m3 (ISO 845)
Porosity: 3.5 L/min (ISO 4638)
Resilience: 40 % (ISO 8307)
Fire Rating:
  • Self-extinguishing (UNE 53127)
  • E-d0 (UNE-EN 13501-1)
Technical Drawing panel Kotka

Sound absorption

Absorption coefficients in octave bands (ISO 354):

Type125 Hz250 Hz500 Hz1 kHz2 kHz4 kHz
flat 0.27 0.52 0.88 0.98 0.97 1.01
angular 0.88 1.00 0.99 1.04 1.04 1.08

* absorption coefficients in third octave are available in the data sheet.

Coeficientes globales [flat] [angular]:

NRC 0.85 (ASTM C423) 1.05 (ASTM C423)
SAA 0.84 (ASTM C423-09a) 1.02 (ASTM C423-09a)
α mid 0.94 (DB-HR) 1.03 (DB-HR)