Manufacturer

akustikplus GmbH & Co. KG

akustikplus develops and manufactures decorative acoustic solutions from wood-based materials at its site in Stephanskirchen near Rosenheim. The company belongs to the Hamberger Group and combines industrial production with real-wood veneer expertise. The range comprises four product lines: smartline (acoustic panels with an integrated wood-wool absorber), slimline (slender slotted panels mounted over a mineral-wool insulation layer), proline (micro-perforated acoustic boards, also available as a furniture board decorative on both sides) and designline (felt panels with veneered MDF slats). Non-combustible versions on a gypsum-fibre base are available on request.

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proline finest

Name: proline finest
Brand: akustikplus GmbH & Co. KG

WallCeiling

Description

proline is a large-format, micro-perforated acoustic panel in real-wood veneer or CPL. At normal viewing distance the perforation recedes strongly and the panel reads as a calm wood surface. It is mounted over a mineral wool insulation layer, optionally with an additional open cavity for greater low-frequency effect. The finest perforation uses the finest hole pattern in the line and is direction-dependent. During fabrication, panel orientation must be observed even for plain decorative laminates. From a normal viewing distance the surface appears almost closed.

Technical data

Material: Substrate: 0.7 in MDF E1 (per Table 8 of EN 13986); 16/0.7 in MDF E1 (B-s1,d0 per DIN EN 13501-1), drilled through | partially drilled · Absorber: mineral wool (insulation layer behind the panel)

Surface: Real-wood veneer | CPL

Up to fire class: flame-retardant C-s2,d0 per DIN EN 13501-1 (composite test); further classes on request

Measurement data

Sound absorption

Reverberation chamber (ASTM C423 / ISO 354)· 3 variants

NRC

0.90

Frequency values

α_p per octave band

f (Hz)	125	250	500	1k	2k	4k
α_p	0.65	0.80	0.85	1.00	0.95	0.85

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		Value
14 in cavity (offen)	2 in mineral wool	NRC0.90
5.9 in cavity (offen)	2 in mineral wool	NRC0.95
without cavity (direkt)	1.2 in mineral wool	NRC0.85

NRC: 0.90 (derived from ISO 354 lab data)

Dimensions: Overall build-up 17 in

Measured values as a table (3 measurements)

proline finest: sound absorption coefficient αs per ISO 354 by frequency and test build-up
Build-up	NRC	100 Hz	125 Hz	160 Hz	200 Hz	250 Hz	315 Hz	400 Hz	500 Hz	630 Hz	800 Hz	1000 Hz	1250 Hz	1600 Hz	2000 Hz	2500 Hz	3150 Hz	4000 Hz	5000 Hz
without cavity (direkt) · 30 mm mineral wool	0.85	0.11	0.34	0.23	0.35	0.46	0.70	0.87	0.95	1.08	1.08	1.04	1.01	0.96	0.88	0.80	0.78	0.78	0.67
150 mm cavity (offen) · 50 mm mineral wool	0.95	0.40	0.48	0.85	0.75	0.99	0.91	0.67	0.85	0.95	0.93	1.01	0.98	0.95	0.91	0.87	0.82	0.77	0.70
350 mm cavity (offen) · 50 mm mineral wool	0.90	0.51	0.61	0.76	0.75	0.84	0.81	0.84	0.83	0.94	0.99	0.99	0.98	0.95	0.95	0.93	0.90	0.86	0.82

Measured values as a table (3 measurements)

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Last updated: 09/15/2026