Studer 928 Brochure

Studer 928

Analog Mixing System

Analog Mixing System

Studer 928

Concentrated functionality

Rarely does an analog mixing console offer such a concentration of
functions. The Studer 928 provides a wealth of features and facilities
at a cost effective price with no compro­mise on S tuders traditional quality.
The 30 mm module architecture, the
low-current technology (no ventila­tors required) and the possibility of
integrating Studer modules from
the existing mixing console fami­lies make this unit extremly
versatile. As a consequence,
the 928 is already used in

n Up to 96 inputs
n Eight groups, four masters
n 10 AUX channels
n Direct output, also as n-1, from each input

module

n Four-band parametric equalizer
n All switches are electronic; where this is not

possible only goldplated contacts are used.

n Quality VCAs; VCA grouping with linear fad-

ers as group masters

n Studer transformers on all inputs and outputs
n Limiter/compressor, can be assigned to any

input via the insert patch panel; time con­stants are optimized according to psycho­acoustical principles.

n Studer Euro boards can be installed in a 19"

card chassis.

many studios around
the world as produc­tion or on-air console,
in radio and TV OB
vans, as a live console
in sports and concert broadcasts, or for
concert and theater PA applications. n

Reliability

For maximum reliability a redundant power
supply is available which in the event of a failure
in the primary supply allows uninterrupted
operation.

n

Patch panel

An integrated, large-capacity patch panel for
inserting external effect machines or the built-in
limiter/compressor are standard features of the
Studer 928.

n

Standard Modules - functional, logically designed elements

Mono Input Module

The input module provides a di ­rect output that can also be
switched to n-1. Individual talk­back on this output is possible
with the talkback key. The mono
input module feeds 8 mono group
and 2 stereo master busses.

The Mono Input Module features
two completely separate, high­quality microphone/line inputs.
Signaling and monitoring can be
switched between DJ or studio mi­crophone. The microphone input
is equipped with transformers.
Line inputs are electronically bal­anced (transformer optional).
A 48 V phantom supply can be
switched to the mic input.

The Parametric Equalizer com­prises high, low and two band
passes, with adjustable center/
corner frequencies. The Q of the
bandpass equalizer is switchable.
The high-pass filter contains a
phase inverter.

6 Mono AUX outputs are fed via
single potentiometers, 2 stereo
AUX outputs with level and
pancontrols. Each AUX path can
be derived pre or post channel
fader.

Stereo Input Module

The Stereo Input Module is equip­ped with electronically balanced,
high-level inputs (transformer op­tional) for line 1 and line 2.

The signal can be channel swapped
via the L/R key, or switched to
mono individually for each channel.

By means of a rotary control the
signal to the master output can be
varied from mono to expanded
stereo. n

Master module

The Master Module features a
limiter with adjustable threshold
and release time. The attack time
is selectable in two steps.

The master fader of the AUX paths
and the corresponding pre­listening keys are also arranged on
the master module.

Each of the two stereo master mod­ules is equipped with a separately
controllable mono output which
can be derived before or after the
output fader. n

Monitoring, Talkback

The Monitoring Module has a
source selector for internal and
external sources, as well as selec­tors for listening via headphones,
monitor speakers, or near -field
monitors. The cue signal can be
derived either pre channel fader
of the selected input module or
post (solo function without influ­ence on the mixdown).

The Talkback Module consists of
a test generator, talkback control
and studio monitoring control.
Talkback can be routed to all AUX
paths, groups, as well as masters
and also into the studio and to ex­ternal lines. Communication to
the direct (n-1) outputs of indi­vidual inputs can be preselected
directly in the corresponding in­put modules. The volume for the
studio can be adjusted individu­ally for two headphone sets as
well as for the studio speaker. T wo
user-assignable keys are available
for signaling.

Both units are equipped with
two linear faders each which act
as VCA group faders. n

The Pancontrol is connected di­rectly to the stereo master output.
The panselection can be enabled/
disabled, also by remote control.

The Main Fader is a Penny & Giles
(100 mm) linear fader; it controls
a high-quality VCA. Up to four
VCA groups can be defined. The
master faders for these groups are
located in the CR and studio moni­tor modules. Fader start is
selectable as pulse or hold func­tion. CUE can be derived pre or
post fader. A small LED bargraph
will display the level before or af­ter the equalizer or the level of the
direct (n-1) output. n

Group module

The Group Module is equipped
with an additional stereo return
with level and pan control and
prelistening output. High-level
stereo sources can be routed di­rectly into the master channels.

In each group module a limiter/
compressor unit is installed. This
can be inserted directly into the
group or assigned to any input via
the integrated insert patch panel.

n

The meter bridge can hold all Studer modules 170 x 40 mm. Shown as example are:

l VU Meter with Gain Reduction Meter 1.913.231
l 2CH PPM Meter 30LED 1.913.105
l 2CH VU Meter 30LED 1.913.106
l 1CH PPM Meter 30LED 1.913.101
l Correlator 2CH 30LED 1.913.109
l Bargraph 2CH PPM 1.913.111

Further possible modules are (not shown):

l Correlator 4CH 1.913.211
l PPM with Gain Reduction Meter 1.913.221
l Correlator 4CH 30LED 1.913.100
l Correlator 4CH 1.913.210
l PPM Meter 1.913.220
l VU Meter 1.913.230
l 2CH PPM Meter 30LED

with Gain Reduction Meter 1.913.107

l 2CH VU Meter 30LED

with Gain Reduction Meter 1.913.108

l Dual Bargraph VU 1.913.112
l Stereo-Display DK-Audio MSD 200 1.913.400

Special Modules -

expanded functionality in a consistent design

Surround sound

The Studer 928 can be equipped for multiformat film
or TV surround productions. By means of a special
multichannel monitor, monitoring can be set to any
format between mono and 6-channel mode, and
controlled direct, encoded or decoded. In this way
quality monitoring is possible also including the
codec processing. The individual speakers can be
switched on/off, including near-field monitors.
Multiformat mixdown is eased by the use of joysticks
(optional).

n

Monitor Mixer for multichannel recording

The optional monitor mixer is available in a 2-channel
or a multiformat surround version. The level control
pots are combined with a panpot function. 8, 12, 24
or 48 channel recorders can be connected and mixed
down on stereo or multiformat surround.

The AUX channels are expanded by two mono and
one stereo channel for additional headphone feed
or effect unit insertion. n

Block Diagram

Technical Data

n General Measuring Conditions

0 dBu = 0.775 V.
All linear faders are set to the 0 dB position.
Line outputs are terminated with 600 Ohms.
Sources have source impedance of less than 200 Ohms.
All data are valid in the frequency band between 31.5 Hz and 16 kHz.
The nominal line output level is (Sinus, 1 kHz): in the PPM version: 100% = +6 dBu

n

Levels

Microphone input sensitivity: -71 ... +10 dBu
Line input sensitivity: +6 dBu ±14 dB
In/output at insert points: +6 dBu
At Direct (n-1) output: +6 dBu
Output level: +6 dBu ±10 dB
Monitor output level (unloaded): +6 ... +15 dBu

n

Overload margin

Microphone input: Max level for 1% 3rd harmonic distortion @ 31.5 Hz: +13 dBu
Line input: Max level for 1% 2nd harmonic distortion @ 31.5 Hz: +24 dBu
Before channel fader (T.H.D. = 1%): +20 dBu
Before master fader (T.H.D. = 1%): +20 dBu
Max. Output level with transformer: +23.5 dBu

n

Impedances

Microphone input (transformer): > 1.6 kOhms
Line input (electronically balanced, transformer optional): > 10 kOhms
Line output (all electronically balanced, master outputs with optional transfomer): < 40 Ohms

n

Common mode rejection

Microphone input (Uin = 0 dBu, v = 0 dB, fine adjust = min) @ 15 kHz: > 50 dB
Line input (50 Hz ... 15 kHz): with transformer: > 50 dB

n

Frequncy response

with EQ switched off: ± 0.5 dB
3 dB points approx.: 4.5 Hz, 40 kHz
Bass cut (18 dB/Oct.): 3 dB @ 75 Hz
High frequency equalizer 1 ... 16 kHz: ±15 dB
High/mid equalizer 500 ... 8k Hz: ±15 dB
Low/mid equalizer 125 ... 2k Hz: ±15 dB
Low frequency equalizer 32 ... 500 Hz: ±15 dB

n

Unweighted noise (acc. to IEC 468-2, DIN 45405)

Equivalent microphone input noise, 200 Ohm source for 23 kHz bandwith: -126 dBu
S/N ratio at output, referred to line level (+6 dBu PPM-Version, +6 VU peak VU-version)

n

T.H.D. ratio

T.H.D. ratio at output, referred to line level
(+6 dBu PPM-Version, +6 VU peak VU-version) all faders at 0 dB, unity gain: > 70 dB

n

Crosstalk attenuation

Channel to channel without panpot: > 80 dB
Channel bus selector switched off: > 90 dB

Fader attenuation, input: > 100 dB
Fader attenuation, output: > 90 dB

n

Power supply

Mains voltage range: 100 ... 240 V, 50/60 Hz
Power consumption (32/8/4 console) 375 VA

The data described refer to a typical console configuration. In special cases, they may differ. We reser ve the right to make
changes as technological progress may warrant without prior notice.

without transformer: +23 dBu

electronically balanced: > 46 dB

on master output, master fader closed: > 95 dB
one channel, all faders at 0 dB, unity gain EQ off: > 93 dB

11 channels, all faders at 0 dB, unity gain EQ off: > 85 dB

with panpot: > 70 dB

(±15 V 9 A
5 V 3 A
48 V phantom supply 0.5 A)
Weight of power supply unit 5.1 kg

in the VU-Meter version: 0 VU = +4 dBu

@ 50 Hz: > 75 dB

EQ on, linear: > 91 dB
EQ on, linear: > 83 dB

Dimensions

Remote Power Supply

Rear Connector Panel

The picture shows an example of the clear layout
of the rear connector panel. Top: Signalling,
Talkback, Inserts and Remote Control; Middle:
Audio; Multipin connectors: Studio, Monitor and
AUX outputs.

Studer Professional Audio AG, Althardstrasse 30, CH-8105 Regensdorf-Zurich Switzerland, Tel. [phone], Fax: [phone]

Direct-Subsidiaries: Austria: [phone], France: [phone], Germany: [phone], U.K.: [phone]

Canada: [phone], Japan: [phone], Singapore: [phone], USA: [phone]

Subject to change. Studer is a registered trade mark of Studer Professional Audio AG

Printed in Switzerland 10.26.3840 (Ed.0999). Copyright by Studer Professional Audio AG

http://www.studer.ch