FRONT PANEL
1. MOUNTING
A sturdy one piece 12 gauge steel face plate accommodates easy transporting along with facilitating
rack installation. The rack mounting holes are designed on ISO standard spacing. Four 10-32 x .5” phillips
machine screws are normally used to secure the amp. Rear support brackets are not required.
2. POWER SWITCH/INDICATOR/FUSE
Check the power amp connections and verify the AC line power source before engaging the POWER
switch. The yellow LED unmistakably indicates that all circuits are properly powered up. Yellow is used
so the operator can see the red indicators (clipping or protect) from a distance. If the yellow power LED
does not light up, remove the lid and replace the fuse located in the back corner where the
AC cord connects to the circuit board. (DCM1001: 25AMP slow blow)
3. CHANNEL LEVEL CONTROL
A precision input LEVEL attenuate is used to adjust the volume levels. To deliver the amps maximum power
without reducing the headroom of the signal source, the level controls should be turned full on.
4. CHANNEL SIGNAL INDICATOR
The green SIGNAL LED indicators will start to flash when there is a signal passing to your speakers (-30dBM).
This lets you know when the amp is passing a signal to your rear speaker connectors.
5. CHANNEL CLIP INDICATOR
The red CLIP LED indicators will start to flash when each channel has reached its maximum output. Occasional
flashing caused by lower bass frequencies is OK. However, consistent flashing caused from higher frequencies
may damage high frequency drivers (excessive distortion). This does not cause damage to the amp.
6. DUAL 9-BAND GRAPHIC EQUALIZERS
Controlling feed-back in a monitor system and fine tuning your sound are easy with the DCM1001’s two
on-board EQ’s. For feed-back, find the offending frequency and push the slider down to cut the level of
that frequency, thus allowing more gain (volume) before feed-back. For tone control, move the sliders
up or down from their center detent positions to suit your taste.
USE THE IN/OUT SWITCHES TO BYPASS THE EQ’s.
7. PROTECT LED INDICATOR
The red PROTECT LED provides the operator with information about the status of the amplifier. The
PROTECT LED can come on under 3 different conditions (when this happens both channels are muted
by disconnecting the output speaker relays protecting your speakers);
1) During power-up, the amplifier stays in a muted state for approx. 3 sec until it determines that
everything is functioning normally (no output shorts or over temp conditions).
2) Both channels are muted when the output load draws excessive current or a direct short is detected
caused by a shorted speaker cable or speaker system. Reset this condition by turning the amp off
for two seconds and then on again. Check for shorted cables and the total speaker system imped-
ance connected to each channel (2 ohms is the minimum per ch or 4 ohms BRIDGED).
3) Overheating is usually determined when the amp stops in the middle of a performance and the
PROTECT LED comes on. If this is the cause, leave the amp on for the fan to cool the amp down.
The amp will automatically reset within 1 to 3 minutes and the PROTECT LED will turn off when
ready. Check for the following conditions; a) The rear intake air is restricted, b) The intake air is
extremely warm, c) The front exhaust vents are restricted, or d) Excessive speaker load (try other
speakers or remove speakers if you have more than one connected to each channel). Again, the
minimum impedance is 2 ohms per ch or 4 ohms BRIDGED)
REAR PANEL
8. XLR CHANNEL INPUTS
For most professional applications, use the XLR balanced inputs. This will help to reduce hum and allow
of longer cable runs from your signal source (mixer, etc). Because this is a balanced input, the gain will
be 6 dB higher than using the 1/4” input jack with non balanced lines. XLR pin configuration: Pin 1: Grounded
through the GROUND LIFT switch, Pin 2: positive Balanced signal and Pin 3: negative Balanced signal.
9. 1/4” CHANNEL INPUTS
These 1/4” TRS phone jacks are designed to receive either balanced or unbalanced input signals. Balanced
signals coming into this jacks should be wired with the connector’s tip going to and the connec-
tor’s ring to signal -. The connector sleeve is then tied to ground through the GROUND LIFT switch.
10. PARALLEL OR “Y” INPUTS
The rear PARALLEL switch allows you to drive both channels from either input. All signals entering any
input will be available on both channels. This eliminates Y adapter cables. This feature is used to “daisy
chain” one piece of equipment to another. Just plug into the unused INPUT (1/4” or XLR) and it will
become an output for other equipment.
11. INPUT GROUND LIFT
Many times sound systems are connected in such a manner to cause a grounded loop with the inputs
that result in audible hum. The input GND LIFT (1/4” & XLR) switch on the rear panel will help eliminate
this problem. If not, another way to eliminate ground loops is to install a “line matching” transformer
between the amplifier input and the signal source and cut the ground wire to PIN 1.
12. LIMITERS
To activate the LIMITERS, engage the rear limiter switch. The built-in professional limiters are recommended
to hold down peaks that could cause early distortion. Limiters will help to raise the average power so that
you can get more output from each channel. To check the effectiveness of the limiters when the channel
starts to distort (under the amps full output), engage the limiters and hear the reduction of the distortion. If
the distortion stops, you can turn the channel up for more power. The lower bass frequencies are most affected.
WARNING: Do not check in an environment where the sound level could damage your ears!
13. SPEAKER OUTPUTS
The standard 1/4” SPEAKER jacks are used for lower power applications. The Twist-Lok connections
are used for higher power and bridged applications. 12 Gauge Twist-Lok speaker cables are an indus-
try standard for high powered connections. Turn the amp off before connecting your speakers.
14. TWIST-LOCK & BINDING POSTS SPEAKER OUTPUTS
Use the rear BINDING POSTS or TWIST-LOCKS as an alternate high powered connection. Wire sizes up to 7
gauge (50 amps) can be inserted into the binding post “side holes”. Larger cable can be used with “banana”
plugs which plug into the end of the binding posts (remove red caps). Binding posts are spaced on ISO stan-
dards. Use the two center RED binding posts for BRIDGE speaker connections (see 15 BRIDGE MODE). Use
12 GA cable for Twist-Lock connection. Insert cable and twist to lock into place. Use center Twist-Lock con-
nector for BRIDGING speaker connections.
NOTE: REMEMBER TO PUSH IN “BRIDGE”BUTTON WHEN
BRIDGING.
15. BRIDGE MODE—
25V/70V DISTRIBUTION SYSTEMS
The “DCM” Series can be operated in bridge mode if you require a 25V / 70V distribution speaker system
or a high powered mono (single channel) amp. With your amp off, push in the rear (recessed) BRIDGE switch.
Use the center Twist-Lok speaker output or make your speaker connections to the center RED binding posts
(ch 1 is + and ch 2 is -). No other speaker connectors or binding posts can to be used at the same time!”.
The INPUT and LEVEL is handled by channel 1. Channel 2 is non-operational. The minimum speaker imped-
ance is 4 ohms or a 25V distribution line. CAUTION: The power developed by bridging your amp can destroy
most speaker systems! Make sure your speaker(s) are of the proper impedance and power handling.
16. AC POWER
Your amp is designed to run on either 120V 60 Hz or 240V 50Hz depending on the model purchased.
The voltage range for 120V model is 95V to 132V and for 240V model it is 195V to 253V. The rear heavy-
duty AC receptacle will accept a standard grounded AC cord that is designed for your country. Be sure
to check your power source before plugging into a grounded (3 prong) outlet. Never defeat the grounded
connection or electrocution may result! Firmly push the AC cord all the way into its receptacle.
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FRONT & REAR PANEL CONTROLS
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