SIAP welcomes you

Who are we?

With more than 70 installations worldwide, SIAP Acoustics B.V is a leading company in the field of variable acoustics, hall acoustics, electroacoustics and room acoustics.

We – the SIAP team – wish the world – everywhere and for everyone – the happiness and joy of the best possible music experience for the ear. The maximum delight in life with which music is interconnected. For us this drive is as simple as it is seemingly self-evident.

The SIAP fundament lays in our musical hearts. The team, lead by CEO’s Wim Prinssen and Reinout Gerlach, has a great passion for fine music, both in listening and performing. It’s a fundamental passion of life to combine our musical and technical talents to achieve the best possible experience of music. Translation of critical and analytical listening into acoustic architecture, results in uncompromized treatment of the music that we want to provide with optimum acoustic sound.


SIAP’s natural process preserves the natural balance, correct localization and sound colour (timbre) of the sources on stage (and in the auditorium):instruments, singers, actors.

Next Level

The SIAP system is real Electronic Acoustic Architecture without compromises.


We generate reverberation that consists of in a natural way (digitally) made reflections. No artificials are allowed.

The Solution

A complete solution for rooms with limited acoustics, Easy to use, no expert needed.


Matching with the design of the room and barely visible, allows rooms to program with great variety.


Much more flexible than architectural or mechanical solutions. Installation in new and existing buildings.


Our electronic SIAP system offers a wider acoustical range of possiblities for (un)amplified music.

More than 70 installations world wide
Patentend working principle
Years support at least

Meet Our people, Our Gurus.

Wim Prinssen
Wim PrinssenCEO / Founder
Founder of the company and creator of the SIAP system. Driven by passion about music, grammophones and limitless thinking.
Acoustics 100%
Management 40%
Reinout Gerlach
Reinout GerlachCEO / Project manager
Combining Alpha & Beta skills is his natural talent and drives him to get the best results. He likes to play and compose music in his ‘ man cave’ (studio).
Operational 100%
Design / Development 65%
Fokke de Jong
Fokke de JongDeveloper
Senior specialist. Thinks creative and is creative. Very easy going and is gifted with a natural calmth and fancy guitar funk playing. Why do it difficult if it is easy.
Programming 100%
Development 25%

SIAP has Global Partners.


We Thrive Ourselves On Musicality, Creativity & Science.

SIAP is distinguished from other systems for variable acoustics by the unique characteristic that SIAP-reverberation is real reverberation.

We Love Music

This pure and honest principle using only natural processes creates a state-of-the art acoustic, that sounds like it should.

We Are Creative

Creating variable acoustics that suits every performance is one thing. But we go further, comprehensive acoustical zones.

We Like Purity

SIAP does not superimpose an artificial acoustic on top of the existing acoustic, but instead forms one whole with it, as it should.