Latest News

+++ Analog Forum Krefeld 21. + 22.10.2017 Demonstration within the Analogue Audio Association: COSINUS, various RS-Preamps and phase shifter W2324 via Sperling Laufwerk L1 and valeuraudio active loudspeakers
Demonstration within the Analogue Audio Association: COSINUS, various RS-Preamps and phase shifter W2324 via Sperling Laufwerk L1 and valeuraudio active loudspeakers

+++ COSINUS at Stockfish Records
COSINUS installation at Pauler Acoustics, Stockfish Records

+++ Further information about Roger Schult at Musikmesse Frankfurt 05.-08.04.2017 05.-08.04.2017
-RS News @ Musikmesse Frankfurt, 5. - 8. April

+++ Editors Choice Award 2016 for W2324
Among the product highlights in 2016, the W2324 phase shifter received Professional Audio's in-house Editors Choice Award 2016.
>> show content (german only)

+++ World's novelty COSINUS 11/2016
roger schult german audio lab and mbakustik developed this unique analogue special filter
( Video Sound & Recording (german only) )

+++ 29. Tonmeistertagung November 2016
17.-20. November in Cologne
CCN 1. OG (Congress-Centrum Nord )

+++ Patrice zu Gast im RS Labor
Patrice mit neuem Album "Life's Blood" (Vinyl)

..to listen to it on this (...) record player that only Roger has - just like many other things that only Roger has..

Posted by Patrice on Monday, October 24, 2016

"..to listen to it on this (...) record player that only Roger has - just like many other things that only Roger has.." Patrice

+++ W2395 and W2395c on September 2016
New Joachim Witt album "Thron" has been produced and recorded by Bassel Hallak using both filter modules.

+++ W2324 phase shifter Test Juli 2016
Professional Audio - E-Paper (German only)
Edition 07/2016

+++ N2310 power supply June 2016
Comparative test in studio magazin
Edition 5/2016

+++ W2395 Test May 2016
studio magazin (download ~2 MB, German only)
Edition 4/2016




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Enhance your signals with filters from roger schult german audio lab

W2344 MK2 RS-MATRIX - Extended stereo image processing system

Roger Schult W2344 MK2 - professional studio equipment

The W2344 is designed by the RS-Laboratory to process audio material in stereo and M/S mastering environments. With two flexible inserts external signal processors can be integrated in the the stereo chain as well as in the M/S signal path. The integrated switch matrix of both inserts, featuring a pre/post (...)       
Further information...

The RS-Matrix awarded in "Professional Audio" issue 06/2017 (German audio magazine)
"Top class: very good - outstanding"



COSINUS - first analogue room correction system

Roger Schult COSINUS - professional studio equipment
roger schult german audio lab and mbakustik developed this unique special filter system for frequency correction and bass management incl. phase shifting function. The COSINUS is a purely analogue filter system for room correction and bass management without the AD / DA conversion necessary for digital filters and it is developed and manufactured by Roger Schult according to the requirements of mbakustik in Germany.

Further information...


W2324 phase shifter (api ® 500 System)


Phasenschieber W2324 phase shifter test in Professional Audio Magazine - download here
The W2324 is a high-precision tool to solve phase problems in sound recording and playback applications.

The W2324 phase shifter is the ultimate tool to hone in and correct those phase problems with unheard-of accuracy and sound quality. Alternatively, experienced engineers will appreciate the creative sound design possibilities offered by the module.

Furthermore, the W2324 can be used in the subwoofer path of any playback system to optimize the low-frequency response and remedy room mode issues thanks to the continuously adjustable phase angle.

Within the selectable frequency range of 23 Hz to 1.57 kHz any frequency build-ups or cancellations due to the time delay between two sources or (when used in the playback path) due to problematic room acoustics can be addressed by shifting of the phase. Simply select the desired frequency range with the 11-position rotary switch and correct the level and phase.      Further information...


Mastering Filter W2395c W2395 Studio Tone Shaper (api 500 ® - System)

The W2395 Studio Tone Shaper is a highly flexible three-band equalizer that is well suited for a wide range of creative and corrective applications.

The unique combination of the broad stroke Baxandall bands and the parametric filter capabilities provides an extraordinarily effective toolkit for handling any program material.

Made in Germany.      Further information...



  (German only)