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Backside Controls – Connectors per Channel Pair
1 Speaker Connectors
Fix the speaker cables to the screw-type terminals
The speaker Impedance shouldn’t come signi cantly below
2 ohms ( 4 ohms in bridge mode)
2/6 VCA Inputs
Inputs for external volume control via our Control panels
WP-V and RP-V, with the DV-Module (digital volume control)
plus up/down contacts or with 0 – 10 V dimmer actuators.
(0 V = nom. Gain, 10 V = –80 dB, 15 V = mute)
3/4 INPUT + THRU (CH 2, DH 4, CH 6 and CH 8)
Symmetric input und parallel outputs for looping through various
inputs. In PARALLEL or BRIDGE mode these inputs are inactive.
5 MODE Switches
5.1 INPUT SENSITIVITY
In the lower position the sensitivity is switched from +4 dBU
(professional) to –6 dBU for home audio applications.
5.2 STEREO/PARALLEL
In the lower position the channel pair is connected in parallel
to the inputs 1, 3, 5 or 7. The gain controls on front and the VCA
inputs still regulate the channels separately.
5.3 BRIDGE MODE
In the lower position the channel pair operates in bridge mode
and is driven by inputs 1, 3, 5 or 7. The PARALLEL mode (5.2)
must be deactivated.
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5.4 STEADY ON
In the upper position the channel pairs operate in AUTO ON/OFF
mode and switch automatically into an idle state (SLEEP) if the
input signal is absent for over 5 min. This signi cantly reduces
power consumption. In the lower position the channel pairs are
permanently active.
7/8 INPUT + THRU (CH 1, DH 3, CH 5 and CH 7)
Symmetric input und parallel outputs for looping through various
inputs. In PARALLEL or BRIDGE mode only these inputs are active.
9 FAULT CONTACT
Floating contact: Closes if one of the ampli er channels is
malfunctioning.
10 STAND-BY
The STAND-BY contact must be closed to activate the ampli er.
It may either be closed by a shorting bridge (delivery condition) or
by an external fl oating switch. Via this contact a single or multiple
ampli ers can be remotely switched on and off by a a fl oating N/O
contact of a voice alarm system. In case of an announcement or if
the connection to the voice alarm system is cut the contact opens
and the ampli ers are shut off . After the contact is closed again
the ampli ers turns on with approx. 5 seconds delay.
11 GROUND/LIFT
In the LIFT position audio inputs and outputs are softly grounded.
In the GROUND position audio ground is directly connected to the
mains ground.
12 IEC Connector
Connect to the power supply using the supplied power cable.
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