Front Panel Adjustments; Front Panel Monitoring; Connecting Audio Inputs; Mxxd Models - powersoft M30D HDSP+ETH User Manual

To take off the blue colored front panel, remove the two
screws highlighted in with a Philips screwdriver. The panel will
easily separate from the amplifier exposing the sponge-like air
filters.
CLIP
6dB
-18dB
SIGNAL
- +32 - +32
dB dB
READY TEMP
FIGURE 11: Unscrew and remove the front panel.
Before replacing the front panel, remember to reposition the
air filter on the chassis by placing it on its designated area, then
reposition and tighten the two frontal screws.

8.2 Front panel adjustments

The front panel of all M Series amplifiers has one
stepped attenuation pot for each channel. Turning the pot
counterclockwise, the user can modify the level of the input
signal in steps corresponding to a gain reduction ranging in:
-∞, 4, 14, 18, 20, 22, 24, 26, 28, 30, 32 dB.

8.3 Front panel monitoring

The M Series front panel provides important information on
the state of the amplifier. It is important to know and understand
the meaning of every front panel indicator LED in order to have
crucial information on the amplifier status.
There are two sets of LEDs on the M Series front panel:
channel indicators and status indicators. Channel indicators: each
channel has its own column set of 4 LEDs. The top LED is red, and
the following three are green. Status indicators: each channel pair
has one set of two green status indicator LEDs.
The function of both families of LEDs is summarized in TABLE 1.
Channel indicators
LED Color
Channel output level has
reached clipping limits
RED
Short circuit protection has
been engaged
Channel output level is above
GREEN
-6 dB of max output level
Channel output level is above
GREEN
-18 dB of max output level
GREEN Input signal presence
Status indicators
LED Color
GREEN Channel is ready
Output power is being
YELLOW reduced due to heat sink
temperature exceeding 75° C
* Should the temperature exceeds 85° C, the LED will stay on and the channel will be muted.
The amplifier will resume normal functioning and the LED will turn off automatically when the
temperature falls below 75° C.
TABLE 1: M Series LEDs chart.
Solid ON Label
OR CLIP
-6 dB
-18 dB
SIGNAL
Solid ON Label
READY
TEMP
*

8.4 Connecting audio inputs

8.4.1

MxxD models

Audio input connections are made via two XLR connectors
found on the rear of the amplifier. Signal looping (i.e. link thru) is
possible using the two XLR male connectors which are also found
on the back panel. The Link on/off button allows to connect input
channels 1 and 2 in parallel.
8.4.2

MxxQ models

Audio input connections are made via four XLR connectors
found on the rear of the amplifier. Signal looping (i.e. link thru) is
possible using the two XLR male connectors which are also found
on the back panel. The Link on/off buttons allows to connect input
channels 1 and 2 (and/or channels 3 and 4) in parallel.
2 1
GND
3
COLD –
HOT +
Balanced input
FIGURE 12: Balanced and unbalanced input XLR connections.

8.5 Connecting audio outputs

WARNING!
Lethal voltage levels may be present at the loudspeaker
connectors when the amp is turned on!
All output connections are made via speakON connectors.
Both bridge as well as single channel output connection modes
are available. In the single channel mode wiring, the 1+ pin of the
connector corresponds to the positive output of the channel, the
1– to ground (see FIGURE 13); for bridge mode refer to Section
8.5.2.
All 4 channel amplifier (MxxQ) manage bridge and single
channel mixed configuration; for example, channels 1 and 2 can
be set in bridge mode, and channels 3 and 4 single-ended.
M Series amplifiers are designed to be connected both to lo-Z
loudspeakers as well as hi-Z, 70V / 100V distributed lines directly.
8.5.1

Lo-Z and 70V/100V operations

High impedance loudspeakers can be paralleled in 70V/100V
distributed lines and directly managed by the M Series amplifiers.
High output voltage per channel of M20D, M30D and M50Q
amplifiers guarantees direct connection to hi-Z loudspeakers in a
line (see FIGURE 13).
8.5.2

Bridge Mode Connection

Bridge mode connection of outputs is possible only in lo-Z
operational mode. Bridging of adjacent channels is possible for the
following pairs: channels 1 with 2 for all models and channels 3
with 4 for MxxQ models. Bridging is NOT possible for other pairs,
for example channels 1 and 3.
2 1
3
GND
HOT +
Unbalanced input
11