6
Volume Level Control
Volume can be controlled in SONARC
or from the individual recessed volume
level control screws, located on the front
panel (see Figure 12). These volume
controls balance the desired sound
levels per channel.
Volume can be controlled three different
ways with SONARC (see Figure 11).
1. Output volume
2. Turn on volume
3. Maximum volume
Output volume and Turn on volume are overwritten in SONARC
when the front panel level controls are adjusted. Output volume
ranges between -70 to 12.
The volume level controls are set
at +12 by default
.
(caution use light pressure when adjusting)
IMPORTANT: USE CAUTION WHEN SETTING VOLUME LEVELS
EITHER ON THE AMPLIFIER OR AN AUDIO SWITCHER AS NOT
TO OVERDRIVE AND POSSIBLY DAMAGE SPEAKERS. VERIFY ALL
SOURCES AS OUTPUT VOLTAGE VARIES FROM DEVICE TO DEVICE.
Source Connections DSP 8-130 MKII
On the left side of the rear panel are the left and right audio inputs
for all eight channels. In addition to the audio inputs there are also
loop outputs for each channel.
The loop outputs allow multiple amplifiers to share common audio
sources. The loop outputs on the amplifiers are not buffered.
The number of amplifiers that can be connected in series will
depend on the output level of your audio source. The source
connected to the LEFT and RIGHT LINE IN Inputs pass through the
LEFT and RIGHT LINE Outputs (see Figure 10).
FIGURE 12: SONARC PAGE IN/OUT SETTINGS OUTPUT VOLUME
FIGURE 10: SONAMP DSP 8-130 MKII LEFT, RIGHT LINE INPUTS/OUTPUTS
FIGURE 11: VOLUME
LEVEL CONTROLS
Amplifier Channel Protection DSP 8-130 MKII
If a channel encounters a short-circuit or extremely low impedance,
the affected channel outputs automatically mute. The output of
the effected channel will remain muted until the fault has been
corrected. Only the effected channels output will mute, all other
channels will continue to operate normally. Note: In bridged mode
the protection circuitry will sense a short circuit across both positive
speaker terminals.
Amplifier Channel Protection Indication LED’s DSP 8-130 MKII
On the front panel of the Sonamp DSP 8-130 MKII amplifiers are
dual color LEDs that illuminate to indicate the current operating
status of each amplifier channel.
LED’s Blinking Red:
This is an indication that the channel is
being overdriven.
LED’s Solid Red:
This is an indication the amplifier is in protect
mode. While in protect mode the LED lights will periodically light
green to retest the output to determine if the short has been removed.
Protect mode could be caused by a short in the wire, overheating
of the amplifier or possibly an internal problem with the amplifier.
IMPORTANT: ALLOWING THE AMPLIFIER TO OPERATE WITH
ONE OR MORE CHANNELS IN PROTECT MODE FOR AN
EXTENDED PERIOD OF TIME CAN DAMAGE THE AMPLIFIER.
Amplifier Power Supply Protection DSP 8-130 MKII:
The amplifier also has protection for the power supply.
Power Switch Blinking Light:
If the power supply heat sink
temperature exceeds the design maximum, the protection circuit
will activate, disconnecting all channel outputs. This is indicated by
a blinking and red LEDs on the front panel power switch.
IMPORTANT: ANY TIME THE PROTECTION CIRCUITS ARE
TRIGGERED, UNPLUG THE AMPLIFIER’S POWER CORD FROM
THE WALL OUTLET BEFORE TROUBLESHOOTING.
Protection Circuitry and LEDs
The Sonamp amplifiers have a multi-stage protection system to
prevent damage to your amplifier and speakers. See Appendix A.
