D.A.S. Audio Compact Series - Manual (Page 28)

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2. AMPLIFIER PANEL DESCRIPTION
(NOTE: model Compact-218 Sub 2k has two of these panels)
A) LIMIT : Amplifier limiter indicator lights. When lit, the level
of the signal source should be reduced.
B) SIGNAL : Signal presence indicator at the amplifiers' inputs.
C) ON : Indicator light for each amplifier channel.
D) FUSE
E1) AC INPUT : with PowerCon NAC 3 FCA connector. Only
when the connector is inserted and rotated (clicked) into place
will the AC turn on. The connector can be used as a switch,
rotating the connector to or from the locked position will turn
the unit on or off, respectively. Mute the signal feeding the
INPUT before turning the unit on or off.
E2) AC OUTPUT : with (white) PowerCon NAC 3 DFCB
connector. This is used as an AC loop thru so that up to four
boxes can be power from a single AC line.
F) INPUT : Balanced signal XLR. Pin assignments as follows :
1 = GND (Ground)
2 = (+) Non-inverted input
3 = (-) Inverted input
G) LOOP THRU : Used for paralleling several units, which will
share the same input. Could also be used to provide signal for
an outboard power amplifier. It can also be used for paralleling
the two sections of a Compact-218 Sub 2k.
H) SATELLITE OUTPUT (Compact-18 Sub and Compact-218
Sub/218 Sub 2k only) : This sends the high-passed signal to
the system that will reproduce the mid-high frequencies.
I) SUB LEVEL (Compact-18 Sub and Compact-218 Sub/218
Sub 2k only) : Used to control the subwoofer level. Does not
affect the satellite output. To prevent accidental mis-setting, a
flat-blade screwdriver is needed to rotate the control, which is
recessed and detented. Depending on the sensitivity,
placement and configuration of your mid-high system, you
may need to adjust this control for balanced frequency
response.
3. USE
3.1 Switch on-off
A sound system should be switched on sequentially. Switch
on the self-powered unit last in your sound system. Switch on
the sound sources such as CD players or turntables, then the
mixer, then the processors, and finally the self-powered unit. If
you have several units, it is recommended that you switch
them on sequentially one at a time.
Follow the inverse order when switching off, turning self-
powered units off before any other element in the sound
system.
Mute all signal sources before switching the unit on or off.
3.2 LIMIT indicators
It is recommended that the red LIMIT LED indicators are not
lit continuously; at most it should blink only occasionally.
If you wish to have a visual indication at the mix position of
whether the LIMIT LEDs are lighting, during equipment set-up,
closely observe what mixer VUmeter level corresponds to the
level that lights the enclosure’s LIMIT LEDs. That level that
should not be exceeded during the event.
3.3 Equalisation
The units do not need extreme settings of equalisation to
produce quality sound. Avoid high levels of gain on the
equalisers. Gain values above +6 dB on a console's EQ are
not recommended.
3.4 Overheating
Due to their high efficiency, the Compact Series amplifiers
generate very little residual heat and therefore do not need a
fan for cooling. In normal use, the amplifier panel will be warm
to the touch.
If the unit stops playing (or just the mid-high or the bass
sections), the amplifier’s overheating protection may be
activated to protect the components from thermal damage.
Overheating may be due to insufficient cooling, or to very
aggressive use in extremely hot conditions. Do not use the
unit in proximity to high power lights.
Once the amplifier cools down, it switches back on
automatically. If the unit should shut down again, try reducing
the volume a notch to avoid overheating.
3.5 Low mains voltage
If mains voltage falls below the shutdown voltage for the unit,
it will stop playing. When acceptable levels are regained, the
unit will switch back on automatically.
Manual del Usuario /
Compact / User’s Manual