Specifications

FRONT
CCM 4VLg
(cardioid)
CCM 4VLg
(cardioid)
CCM 8Lg
(figure-8)
102
Double M/S
1. Double M/S Set with Splitter
The DMS splitter box is a passive device that simplifies
connecting a double M/S microphone array to the phan-
tom-powered inputs of preamplifiers or mixers that
contain matrixing circuitry (e.g. 2 × SCHOEPS VMS 5 U).
It divides the three signals into five (the center channel
plus the front- and rear-facing M/S pairs), and prevents
the two microphones which serve dual functions from
being powered twice.
2. Double M/S Set with M DMS
The SCHOEPS MDMS matrix is, in all respects, the sim-
plest and most elegant way to obtain surround signals.
It is a small, sturdy box with high-quality transformers
forming a passive decoder matrix. Microphone signals
are converted directly into 5.0 L / R / C / LS / RS surround
signals. A second, switchable mode supplies four sig-
nals with no center-channel output.
The matrix parameters have been chosen so that the
resulting signals correspond to an optimal arrangement
(as shown at left) while avoiding unwanted artifacts.
Both settings have the following characteristics:
– minimal overlap (crosstalk)
– optimal pickup balance in all directions
– well-balanced 360° localization capability
– optimal constancy of total levels across 360°
– minimal pickup via the rear lobe (< -11 dB)
The matrix settings were determined through extensive
practical testing, including ambient recordings, television
shows, and theatrical and musical performances. In gen-
eral the best possible results will be those obtained by
using the output signals of the M DMS matrix directly.
Our investigations also considered other ways to
optimize the functioning of the double M/S sets in
concert halls and other typical settings in which sur-
round recordings must maintain a fundamental front-
back distinction. For example, delaying the surround-
channel signals can improve the perception of spacious-
ness and avoid localization errors throughout a wider
listening area. As a further measure to improve the
spatial impression, the double M/S array can be aug-
mented with more distantly-placed room microphones.
Phantom powering is required on only three of the
inputs to which the MDMS is connected.
Note: The coefficients of the MDMS have been set
for use with a front-facing SCHOEPS cardioid micro-
phone. Unfortunately, the supercardioid or shotgun
alternatives of the other Double M/S sets would not
produce suitable results with this arrangement.
A “Double M/S” VST plug-in for Windows can be
obtained by filling in a registration form at www.
schoeps. de/dmsplugin.html. This plug-in supports
simple, intuitive decoding of the three microphone sig-
nals.
FRONT
WSR DMS LU (150 mm dia.)
complete windscreen for
Double M/S Set ”Splitter”
and ”MDMS”
WJ DMS Windjammer
(fur-like cover for enhancing the
protection against wind noise)
M DMSU
passive matrix
for Double M/S
KDMS 5 U,
XLR-7 extension
cable, 5 m long
CL LS RS R
New!
The directional patterns which are effectively created by
matrixing the output signals from the M DMS in ”Surround”
mode (above left) and in ”Ambience and Stereo” mode
(above right)
”Surround” ”Ambience and Stereo”
Double M/S Set with M DMS: