OHM DSP-A3 User manual
DSP-A3
DSP-A3
Operating Mode
1. Stereo Operation
Two fully independent amplifier channels for (normal operating mode)
Select preset “ Stereo mode” to enable normal stereo operation (see “Presets” on page 8)
2. Bridge OperationMono
The input signal is taken from the channel A input.
Connect the + of your loudspeaker to pin 1+ of channel A output, and the - of your loudspeaker
to pin 2+ of channel A output.
Select preset “ Bridge Mono mode” to enable Bridge operation (see “Presets” on page 8)
10
RJ45
ETHERNET
INPUTS
OUTPUTS
CHANNEL ACHANNEL B
Ethernet Connector
The Ethernet connector accepts an RJ-45 connector for networking.
Built into the connector is a yellow and green LED indicator, The green
indicator is lit when the amplifier is connected to your network. The yellow
indicator shows any network activities.
To connect the amplifier with your network, use a standard Ethernet cable. You can connect as
many amplifiers as you want. You can also use as many switches as you need but make sure
there’s only one router built into your network. A switch is responsible for the data transfer
between all connected units of your network. A router with DHCP is needed to assign the IP
addresses to the units.
Output and Input Terminals for Fire muting.
If the amplifier is switched off the output controls are always
open. If you switch the amplifier on they are controlled by
supervision (see “Supervision” below). The contacts are rated
24V/1 Ampere.
With the contact inputs, it is possible to control various
amplifier functions such as mute or external fault. Please refer
to the help file in the DSPNET software for more information.
Supervision
The amplifier features supervision to enable your installation to comply with international
emergency standards (such as EN60849). In addition, you can use these features to monitor
your amplifiers remotely without using a PC.
Check the respective checkboxes in the
DSPNET network software to enable
supervision for:
Which monitors the presence of a pilot tone
for each channel (default off)
Which monitors the internal functionality of
the amplifier (default off)
!
!
!
Pilot Tone Supervision InputA/B
Internal Supervision
Ethernet supervision
Which monitors the ethernet connection
(default off)
When a fault condition exists:
LCD screen displays “External Fault”
Status LED for the faulty channel lights red
The output contact for the faulty channel will be open
!
!
!
Preset 1User
External Fault
Input Gain:
OdB OdB
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DSP-A3
DSP-A3
DSP-A3 SWITCHMODE AMPLIFIER
