CARVIN DCM1540L User manual

SHIELD
-NEG. 3
1
2
GND
+ SIGNAL (BAL.)
Twist-Lok
Housing
Contact
Insert
Cable
Clamp
Securing
Hub
• Connection Configuration:
Black (1+) / positive
White (1-) / negative
Red (2+) / positive
Green (2-) / negative
• Solder wires in contacts or use hex screws provided.
• Slip "Securing Hub" then "Cable Clamp" over cable before attaching wires.
1+
1-
2+
2-
Solder tinned wires 1/4"
Strip cable insulation back 3/4"
Sleeve Ring
Neg. Tip
Pos.
TRS 1/4” Balanced
Tip-Ring-Sleeve
TS 1/4” Unbalanced
Tip-Sleeve
TipSleeve
Ring
Tip
XLR
Tip
Ground Ground
Ring
- SIGNAL (BAL.)
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
SAFETY INSTRUCTIONS (EUROPEAN)
The conductors in the AC power cord are colored in accordance with the following code.
GREEN & YELLOW—Earth BLUE—Neutral BROWN—Live
U.K. MAIN PLUG WARNING: A molded main plug that has been cut off from the cord is unsafe.
NEVER UNDER ANY CIRCUMSTANCES SHOULD YOU INSERT A DAMAGED OR CUT MAIN PLUG
INTO A POWER SOCKET.
IMPORTANT! FOR YOUR PROTECTION, PLEASE READ THE FOLLOWING:
WATER AND MOISTURE: Appliance should not be used near water (near a bathtub, washbowl,
kitchen sink, laundry tub, in a wet basement, or near a swimming pool, etc). Care should be taken
so that objects do not fall and liquids are not spilled into the enclosure through openings.
POWER SOURCES: The product should be connected to a power supply only of the type
described in the operating instructions or as marked on the appliance.
GROUNDING OR POLARIZATION: Precautions should be taken so that the grounding or
polarization is not defeated.
POWER CORD PROTECTION: Power supply cords should be routed so that they are not likely
to be walked on or pinched by items placed upon or against them, paying particular attention to
cords at plugs, convenience receptacles, and the point where they exit from the appliance.
SERVICING: The user should not attempt to service the appliance beyond that described in the
operating instructions. All other servicing should be referred to qualified service personnel.
FUSING: If your unit is equipped with a fuse receptacle, replace only with the same type fuse.
Refer to replacement text on the unit for correct fuse type.
This symbol is intended to
alert the user to the presence
of uninsulated “dangerous
voltage” within the product’s
enclosure that may be of suf-
ficient magnitude to constitute a risk of
electric shock to persons.
This symbol is
intended to alert the
user to the presence
of important operating
and maintenance (ser-
vicing) instructions in the literature
accompanying the appliance.
CARVIN ENGINEERING DATA OPERATING MANUAL
The DCML power amps deliver exceptional sound/reliability, ultra-light weight
15lb (6.4kg) from 1500w to 3800w and it’s made in the USA. You’ll appreciate
the ultra-light feature, which comes in part from its heavy-duty aluminum frame.
High power, uncompromised sound and maximum reliability is at its best for
both touring systems and fixed installations. The concert stage is the ultimate
test of professional audio. Concert audio has to be uncompromising, reliable
and efficient and that’s where the DCM has made its mark night after night, year af-
ter year serving top artists and concert venues for the last decade.TheDCMisa prov-
en American made workhorse backed by 40 years of manufacturing excellence.
HIGH POWER TOPOLOGY
The CLASS A/B linear topology features high current bipolar output devices that
reduce distortion to a near theoretical zero .03% THD while delivering high slew
rate performance for crystal clear highs and chest pounding bass – every note is
vibrant, pure and natural. The DCM’s headroom reveals its high dynamic power
from the Switchmode power supply that operates at 100,000 Hz. Extreme cur-
rents are delivered to the most demanding 4 ohm bridged subwoofer systems.
The high efficient Switchmode supply is a league above toroids saving not only
AC power from the wall but reducing internal heat. The DCM easily handles
the most difficult mismatched or reactive loads and is AC generator friendly.
The soft-start gently turns the DCM on to prevent tripping AC breakers. The
DCM1000L and DCM2000L feature Class D output raising power amp efficiency
even higher! The DCM1540L, DCM3000L and DCM3800L feature linear Class
A/B output stages.
COOL EFFICIENT DESIGN
A high efficiency heat transfer system offers the most advanced cooling, which
is one of the keys to reliable power. Five high ratio 6063-T5 flow-through alu-
minum heat sinks remove heat fast with multi-speed fans that runs quiet under
2 ohms loads (except DCM1540L). Air is pulled from the rear and exhausted to
the front to keep the rear of your rack cool. R & D designed a “direct mount”
system for the power output devices to be directly mounted to the heat sink,
which eliminates any thermal barrier to keep your amp running cool.
FRONT PANELS & CONNECTING UP
The DCM Series feature front panel signal, peak and protect LEDs which let you
monitor the status of the amp. Both channels use detente level controls allowing
you to see your settings at a glance. Balanced TRS & XLR input connectors are
used to eliminate hum & noise. Speaker outputs feature heavy-duty binding
posts, and combo Speakon™ / 1/4” jacks.
The rear professional accessory group offers a GROUND switch to remove the
chassis ground from the XLR input. A PARALLEL input switch connects the inputs
together eliminating Y cables for patching multiple amp systems. The accessory
group also features a BRIDGE MODE switch to deliver twice the power into a
“mono” load or a 70V distribution system, and a LIMITER ON/OFF switch gives
the choice of using the internal limiter circuitry.
CONSTRUCTION
The DCM construction starts with a heavy 2RU aluminum chassis. All printed
circuit cards are double-sided FR4 military-grade fire retardant with plated through
holes - soldered under, on top and through each component. SMT - surface mount
technology offers “shock-proof” protection. The CB and CE safety seal assure that
each DCM meets strict standards for service anywhere in the world. Auto switches
from 120VAC 60Hz or 240VAC 50Hz - no manual switch to change.
DCM-L POWER AMP SPECIFICATIONS:
MODEL DCM1540L DCM2000L DCM3000L DCM3800L DCM1000L DCM2004L
1 Channel RMS Continuous
8Ω(20-20k Hz, <1.0%) 475w 400w 600w 775w 210w 350w
4Ω(20-20k Hz, <1.0%) 825w 700w 1025w 1225w 325w 350w
2Ω(20-20k Hz, <1.0%) - 1150w 1650w 1950w 520w –
Both Channels RMS Continuous
8Ω(20-20k Hz, <1.0%) 425/425w 325/325w 550/550w 700/700w 200/200w 300/300w
4Ω(20-20k Hz, <1.0%) 750/750w 600/600w 950/950w 1150/1150w 325/325w 500/500w
2Ω(20-20k Hz, <1.0%) - 1000/1000w 1500/1500w* 1800/1800w* 500/500w –
Bridged RMS Continuous
8Ω, (20-20k Hz, <1.0%) 1500w 1200w 1900w* 2300w* 650w –
4Ω, (20-20k Hz, <1.0%) - 2000w 3000w* 3800w* 1000w –
All ratings EIA 1% THD at 1 kHz except * tested at 1 k Hz no clipping 33ms on 66ms off
Net Weight: 14 lbs (6.4kgs) 14 lbs (6.4kgs) 15 lbs (6.8kgs) 15 lbs (6.8kgs) 10 lbs (4.5kgs) 10 lbs (4.5kgs)
Topology: CLASS AB CLASS AB CLASS AB CLASS AB CLASS D CLASS D
THD (20-20k Hz 50% power) 0.03%, (20-20k Hz 90% power) 0.1% <0.1% at 50% power,
< 0.2% at 90% power
Power Supply: Switchmode Switchmode
Damping Factor: >500 >500
Slew Rate: bridged mode >50v/µs
Sensitivity: (4Ω, Vms) 1.0 V (4Ω, Vms) 1.0 V
Signal to Noise Ratio: above 106dB above 106dB
Frequency Response: ±0.5 dB, 20 Hz to 20kHz (±1.5 dB, 10 Hz & 40 kHz) +0/ -3 db 20Hz - 20kHz
Input Impedance: >20K Ω, balanced >20K Ω, balanced
Protection Circuits: 
Control/Indicators:
Front:

Rear:


Internal Fuse:  DCM1540L: 15A, DCM2000L: 20A, 240V/10A, DCM1000L: 10A, 240V/5A,
DCM3000L: 20A, 240V/10A, DCM3800L: 20A, 240V/10A, DCM12004L: 15A, 240V/5A,
Dimensions:
0709
RECEIVING INSPECTION—read before getting started
INSPECT YOUR UNIT FOR ANY DAMAGE which may have occurred during shipping. If any
damage is found, please notify the shipping company and CARVIN immediately.
SAVE THE CARTON & ALL PACKING MATERIALS. In the event you have to re-ship your
unit, always use the original carton and packing material. This will provide the best possible
protection during shipment. CARVIN and the shipping company are not liable for any damage
caused by improper packing.
SAVE YOUR INVOICE. It will be required for warranty service if needed in the future.
SHIPMENT SHORTAGE. If you find items missing, they may have been shipped separately.
Please allow several days for the rest of your order to arrive before inquiring.
RECORD THE SERIAL NUMBER on the enclosed warranty card for your records. Keep your
portion of the card and return the portion with your name and comments to us.
USA customers register online at: www.carvin.com/registration
All other countries register online at: www.carvinworld.com/registration
DCM1540L, DCM1000L, DCM2000L,
DCM2004L, DCM3000L, DCM3800L
LIMITED WARRANTY
Your Carvin product is guaranteed against failure for 3 YEARS unless otherwise stated. Carvin
will service and supply all parts at no charge to the customer providing the unit is under war-
ranty. Shipping costs are the responsibility of the customer. CARVIN DOES NOT PAY FOR
PARTS OR SERVICING OTHER THAN OUR OWN. A COPY OF THE ORIGINAL INVOICE IS
REQUIRED TO VERIFY YOUR WARRANTY. Carvin assumes no responsibility for horn drivers
or speakers damaged by this unit. This warranty does not cover, and no liability is assumed,
for damage due to: natural disasters, accidents, abuse, loss of parts, lack of reasonable care,
incorrect use, or failure to follow instructions. This warranty is in lieu of all other warranties,
expressed or implied. No representative or person is authorized to represent or assume for
Carvin any liability in connection with the sale or servicing of Carvin products. CARVIN SHALL
NOT BE LIABLE FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES.
SERVICE:
In the USA, please go to www.carvinservice.com
Outside the USA, contact your dealer or go to http://www.carvinworld.com for your nearest
service center. Include a written description of the problem with serial number and date
of purchase.
MAINTAINING YOUR EQUIPMENT
Avoid spilling liquids or allowing any other foreign matter inside the unit. The panel of your
unit can be wiped from time to time with a dry or slightly damp cloth in order to remove dust
and bring back the new look. As with all pro gear, avoid prolonged use in caustic environ-
ments (salt air). When used in such an environment, be sure the amplifier is adequately
protected by rack, covers, etc..
REFER SERVICING TO QUALIFIED SERVICE
PERSONNEL! THIS UNIT CONTAINS HIGH
VOLTAGE INSIDE!
CAUTION
RISK OF ELECTRIC SHOCK
8 OHM 325W/CH - 1200W BRIDGE
4 OHM 600W/CH - 2000W BRIDGE
2 OHM (MIN) 1000W/CH
120-240VAC 50/60Hz 1000VA
BRIDGE OUTPUT SPEAKONS™ ACCEPT 1/4 INCH JACKS
INPUT
THRU INPUT INPUT THRU
GND PARALLELLIMITERBRIDGE
LIFT
ONLY
BRIDGE
1
2
1
2
8 OHM 325W/CH - 1200W BRIDGE
4 OHM 600W/CH - 2000W BRIDGE
2 OHM (MIN) 1000W/CH
120-240VAC 50/60Hz 1000VA
BRIDGE OUTPUT SPEAKONS™ ACCEPT 1/4 INCH JACKS
INPUT
THRU INPUT INPUT THRU
GND PARALLELLIMITERBRIDGE
LIFT
ONLY
BRIDGE
1
2
1
2
8 OHM 325W/CH - 1200W BRIDGE
4 OHM 600W/CH - 2000W BRIDGE
2 OHM (MIN) 1000W/CH
120-240VAC 50/60Hz 1000VA
BRIDGE OUTPUT SPEAKONS™ ACCEPT 1/4 INCH JACKS
INPUT
THRU INPUT INPUT THRU
GND PARALLELLIMITERBRIDGE
LIFT
ONLY
BRIDGE
1
2
1
2
speaker imp.
8 ohm
speaker imp.
8 ohm
speaker imp.
8 ohm
speaker imp.
8 ohm
speaker imp.
8 ohm
speaker imp.
8 ohm
speaker imp.
8 ohm
speaker imp.
8 ohm
2 ohm
per channel
8 OHM 325W/CH - 1200W BRIDGE
4 OHM 600W/CH - 2000W BRIDGE
2 OHM (MIN) 1000W/CH
120-240VAC 50/60Hz 1000VA
BRIDGE OUTPUT SPEAKONS™ ACCEPT 1/4 INCH JACKS
INPUT
THRU INPUT INPUT THRU
GND PARALLELLIMITERBRIDGE
LIFT
ONLY
BRIDGE
1
2
1
2
Mixed Impedance
4 ohm CH1, 8 ohm CH2
2 ohm
per channel
speaker imp.
4 ohm
speaker imp.
4 ohm
speaker imp.
4 ohm
speaker imp.
4 ohm
4 ohm
Bridged
speaker imp.
4 ohm
speaker imp.
4 ohm
speaker imp.
8 ohm
MIN IMPEDANCE
DCM2000L/DCM2500L/DCM3000L and DCM3800L minimum is 2 ohm per channel and 4 ohm bridged.
DCM1540L minimum is 4 ohms per channel and 8 ohms bridged.
DCM1000L, DCM1540L, DCM2000L, DCM3000L, DCM3800L

DCM1000
PROTECT
∞
50
30
22
19
17
15
13
12 11 10 98
7
6
5
4
3
2
1
0 dB
DCM1000
1000 Watt Power Amp
CLIP
SIGNAL
∞
50
30
22
19
17
15
13
12 11 10 98
7
6
5
4
3
2
1
0 dB
POWER
CHANNEL ONE CHANNEL TWO
CLIP
SIGNAL
8 OHM 325W/CH - 1200W BRIDGE
4 OHM 600W/CH - 2000W BRIDGE
2 OHM (MIN) 1000W/CH
120-240VAC 50/60Hz 1000VA
BRIDGE OUTPUT SPEAKONS™ ACCEPT 1/4 INCH JACKS
INPUT
THRU INPUT INPUT THRU
GND PARALLELLIMITERBRIDGE
LIFT
ONLY
BRIDGE
1
2
1
2
FRONT PANEL
1. MOUNTING
Sturdy one piece 12 gauge steel face plate accommodates standard 19” rack installation. The rack mount-
ing holes are designed on ISO standard spacing. Four 10-32x.5” phillips machine screws are normally
used to secure the amp. Rear support brackets are not required.
2. POWER SWITCH
Check the power amp AC making sure the rear plug is fully inserted before engaging the power switch.
The blue POWER LED indicates that all circuits are properly powered up.
3. PROTECT RED 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
and the speaker relays disconnect the 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) The RED PROTECT LED will illuminate 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 that the total
speaker impedance is not below 2 ohms per channel - 4 ohms bridged (DCM1540L - 4 ohms per
channel/ 8 ohms bridged).
3) Overheating is usually determined when the amp stops in the middle of a performance and the RED
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 3 minutes. The PROTECT LED will turn off when ready.
Check for the following conditions; a) The rear intake air is not restricted, b) The intake air is not
extremely warm, c) The front exhaust vents are not restricted, or d) No excessive speaker load (try
other speakers or remove speakers if you have more than one connected to each channel).
Power supply protections are not indicated by the protection LED, but by the power turning off completely.
If the protected state is a thermal power supply issue or an over current power supply issue, the power
supply with reset it self and go through the same turn on cycle as when first turned on.
4. CHANNEL LEVEL CONTROL
A precision input LEVEL attenuator 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.
For multi-speaker systems, the volume levels can be used to match loudspeakers with different output
sensitivity levels and room locations.
5. CHANNEL SIGNAL INDICATOR, 40% & 80% OUTPUT
You have a 3 meter segment per channel to indicate levels (SIGNAL LED only on DCM2004L). The green
SIGNAL LED indicator will start to flash when there is a low input signal (-30dBµ). The 40% and 80%
LED’s will light solid when output power has reached 40% and 80% levels.
6. CHANNEL CLIP INDICATOR
The RED CLIP LED indicators flash when each channel has reached its maximum output. Occasional
flashing caused by low frequency peaks are difficult to prevent and will not harm speakers capable to
handle the amplifiers output. However, consistent flashing (excessive clipping/square wave) will damage
speakers if not reduced. This does not cause damage to the amp.
7. COOLING VENTS/FAN
Upon rack installation, the rear of the amp must be fully exposed to room temperature air. The surrounding
air should not be warmer than 120° with full loading and heavy usage, or the thermal protection could
active early. The front cooling vents are not to be restricted. Air flows from back to front. The use of external
fans need to flow the same direction or the amplifier will starve for air and thermal off.
2 14
5
67
7
15 9
14
WARNING
This product produces high
sound pressure levels that could
damage your hearing. Use with
caution.
FRONT & REAR PANEL CONTROLS
Typical STereo SeTup (or mono bi-amp)
PARALLEL switch OFF (OUT).
8 OHM 325W/CH - 1200W BRIDGE
4 OHM 600W/CH - 2000W BRIDGE
2 OHM (MIN) 1000W/CH
120-240VAC 50/60Hz 1000VA
BRIDGE OUTPUT SPEAKONS™ ACCEPT 1/4 INCH JACKS
INPUT
THRU INPUT INPUT THRU
GND PARALLELLIMITERBRIDGE
LIFT
ONLY
BRIDGE
1
2
1
2
To signal socket XLR or 1/4" 2 or 3 cond. shielded
Activate the BRIDGE switch
(IN). Control the level by Ch 1
(Ch 2 does not function.)
Ch 1 Input
Single speaker or
system connected
in BRIDGE mode.
Minimum imp. 4 W
Use either the
Bridged Speakon™
connector or the
binding posts. No
other connections
can be used while in
Bridged mode.
Connect the DCM1015 in
“bridge mode” to deliver 70
volts. Higher powered amps
will exceed 70v, damaging
transformers and speakers.
+
16
8
4
C
15w
7w
3w
1w
C
+
16
8
4
C
15w
7w
3w
1w
C
8
8 OHM 325W/CH - 1200W BRIDGE
4 OHM 600W/CH - 2000W BRIDGE
2 OHM (MIN) 1000W/CH
120-240VAC 50/60Hz 1000VA
BRIDGE OUTPUT SPEAKONS™ ACCEPT 1/4 INCH JACKS
INPUT
THRU INPUT INPUT THRU
GND PARALLELLIMITERBRIDGE
LIFT
ONLY
BRIDGE
1
2
1
2
Right Full Range
For (stereo) the PARALLEL
switch must be OFF (OUT).
Left (Mono) Full Range
Ch 1 Left
Ch 2 Right
BRIDGE switch
must be OFF (OUT).
Bridged Mono
13
3
4
HELPFUL HINTS
6) DEDICATED CIRCUIT BREAKER: Each amp will require
a dedicated circuit breaker for its full output. There will be
a sustained loss of power if the AC voltage falls below the
rated 120V or 230/240V input. Normally a 2000w amp or
higher would require its own 20 amp circuit to deliver its
full power at 2 ohms/channel or 4 ohms bridged.
1) NO SOUND FROM CH 2: The rear (recessed) BRIDGE
switch has been inadvertently pushed in.
2) STEREO CHANNELS SOUND THE SAME: The rear
PARALLEL switch has been inadvertently pushed in.
3) NO HIGH FREQUENCIES: Tweeters or midrange drivers have
been damaged or blown from feedback or to much power.
4) SYSTEM HUM: Switch the rear GND LIFT switch IN to
reduce hum.
5) POOR SOUND (BASS): The speaker systems are wired out
of phase to each other. To correct, check polarity and if nec-
essary reverse the wires on one speaker connector only and
your sound, especially the bass will improve.
1011
12
8 OHM 325W/CH - 1200W BRIDGE
4 OHM 600W/CH - 2000W BRIDGE
2 OHM (MIN) 1000W/CH
120-240VAC 50/60Hz 1000VA
BRIDGE OUTPUT SPEAKONS™ ACCEPT 1/4 INCH JACKS
INPUT
THRU INPUT INPUT THRU
GND PARALLELLIMITERBRIDGE
LIFT
ONLY
BRIDGE
1
2
1
2
PARALLEL
switch must be OFF (OUT).
Ch 1 Low Frequencies
Ch 2 High Frequencies
BRIDGE switch
must be OFF (OUT).
4-pin Speakon
2-pin
2-pin
8 OHM 325W/CH - 1200W BRIDGE
4 OHM 600W/CH - 2000W BRIDGE
2 OHM (MIN) 1000W/CH
120-240VAC 50/60Hz 1000VA
BRIDGE OUTPUT SPEAKONS™ ACCEPT 1/4 INCH JACKS
INPUT
THRU INPUT INPUT THRU
GND PARALLELLIMITERBRIDGE
LIFT
ONLY
BRIDGE
1
2
1
2
PARALLEL
switch must be OFF (OUT).
Ch 1 Low Frequencies
Ch 2 High Frequencies
BRIDGE switch
must be OFF (OUT).
4-pin Speakon
2-pin
2-pin
LEFT RIGHT
BiaMping MUST USE AN ELECTRONIC CROSSOVER OR SPEAKER MANAGEMENT SYSTEM TO SEPARATE HIGH AND LOW FREQUENCIES
REAR PANEL
8. CHANNEL INPUTS
The XLR balanced inputs will help reduce signal interference and allow longer cable runs from your
signal source (mixer, etc). Because this is a balanced input, the gain will be 6 dB higher than using an
unbalanced 1/4” cable on the 1/4” TRS input jacks. XLR pin configuration: Pin 1: Grounded through the
GROUND LIFT switch, Pin 2: positive balanced signal, Pin 3: negative balanced signal. The THRU XLR
connector passes the signal out for connection to another amplifier’s input. (excludes DCM2004L)
The 1/4” TRS jacks are balanced and designed to receive unbalanced input signals. The DCM12004L
features only XLR inputs. Balanced signals coming into this jack should be wired with the connector’s
tip going to signal + and the connector’s ring to signal -. The connector’s sleeve is tied internally to
ground through the GROUND LIFT switch.
9. PARALLEL “Y” INPUTS
The rear PARALLEL switch connects both channels together from either input. This eliminates Y adapter
cables. This feature is used to “daisy chain” one piece of equipment to another. Just plug into the unused
INPUT (TRS or XLR) and it will become the output for other equipment.
10. INPUT GROUND LIFT
Systems can be connected in such a manner as to cause a “grounded loop” with the inputs, which results in
audible hum. The input GND LIFT switch (TRS & XLR) on the rear panel will help eliminate this problem.
11. LIMITERS (excludes DCM2004L)
To activate the LIMITERS, engage the rear limiter switch. The built-in limiters are recommended to hold
down peaks that could cause clipping. To check the effectiveness of the limiters, run the amplifier to the
point where clipping begins. Then engage the limiters and listen/watch for the reduction of the distortion
and clipping. If the distortion stops, you can try to turn the channel up for more power until distortion is
heard. The lower bass frequencies are most affected. WARNING: Do not check in an environment where
the sound level could damage your ears! Limiters only affect the signal if the amplifier has entered clipping
so it is best to have the limiters engaged at all times to protect the speakers from excessive clipping.
12. BRIDGE MODE (excludes DCM2004L)
With your amp off, push “in” the rear (recessed) BRIDGE switch then make your connections to either the
center bridge Speakon™ or the RED binding posts (ch 1 is + and ch 2 is-). In bridged mode, the ampli-
fier channels are out-of-phase from each other. Accidental pressing of the switch will cause damage or
improper operation. WARNING: No other speaker connectors or binding posts may be used at the same
time! Use channel 1 INPUT and LEVEL for bridge mode. Channel 2 is not used, except for parallel to another
amplifier (see 9 PARALLEL). The minimum speaker impedance is 4 ohm (8 ohm for the DCM1540L) .
CAUTION: The power developed by bridging your amp can destroy most speakers.
13. SPEAKER 1/4” AND SPEAKON™ COMBO OUTPUTS
The speaker connectors feature a combination of both 1/4” SPEAKER jacks for low power applications
and Speakon™ connectors for high power application. Secure the Speakon™ connection by turning to
the right to the lock position. The center Speakon™ on the 2-channel amps is for the “Bridge” output
only. Turn the amp off before connecting your speakers.
14. SPEAKER BINDING POSTS (exludes DCM2004L)
For wire (banana connectors), use the rear BINDING POSTS to connect your speakers. 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. Binding posts are spaced on ISO standards. For BRIDGE
speaker connections (see 12 BRIDGE MODE).
15. AC POWER Your amp is designed to auto switch to either 120V 60 Hz or 240V 50Hz. The volt-
age range for 120V is 95V to 132V and for 240V is 195V to 255V. The rear heavy-duty AC receptacle
will accept a universal grounded AC cord. Be sure to check your power source before plugging into a
grounded (3 prong) outlet. Firmly push the AC cord all the way into the receptacle or the amp will not
function. WARNING: Never defeat the grounded connection or electrocution may result! FUSE: The
fuse is located within the main chassis near the AC connector on the PC card. Normaly if the fuse fails,
the amp will require service. See specifications chart for fuse values. NOTE: Each amp will require a
dedicated circuit breaker for the amp to achieve its full output.
CHANNEL 4CHANNEL 3CHANNEL 2CHANNEL 1
DCM2004L
1
2
3
444567
9
10
8
8
15 13
Two Channel DCM Amplifiers Four Channel DCM2004L