Studiomaster DPA 5000 Bedienungsanleitung
DUAL CHANNEL
POWER AMPLIFIERS
Owner’s Manual
DPA 2000
DPA 3200
DPA 4500
DPA 5000
R
CLIP
SIGNAL
PROTECT
POWER
Class H Professional Power Amplifier
CH 2CH 1
-6
-10
-15
-30 -1
-3
-80 0dB
-6
-10
-15
-30 -1
-3
-80 0dB
POWER
I
I
I
I
O
O
O
O
CLIP
CLIP
CLIP
SIGNAL
SIGNAL
SIGNAL
PROTECT
PROTECT
PROTECT
POWER
POWER
POWER
Class H Professional Power Amplifier
Class H Professional Power Amplifier
Class H Professional Power Amplifier
CH 2
CH 2
CH 2
CH 1
CH 1
CH 1
-6
-10
-15
-30 -1
-3
-80 0dB
-6
-10
-15
-30 -1
-3
-80 0dB
-6
-10
-15
-30 -1
-3
-80 0dB
-6
-10
-15
-30 -1
-3
-80 0dB
-6
-10
-15
-30 -1
-3
-80 0dB
-6
-10
-15
-30 -1
-3
-80 0dB
POWER
POWER
POWER
The above warning is located on the top of the unit
Explanation of Graphical Symbols
The lightning flash with arrowhead
symbol within an equilateral triangle is
intended to alert the user to the presence
of uninsulated “dangerous voltage”
within the product’s enclosure that may
be of sufficient magnitude to constitute a
risk of electric shock to persons.
The exclamation point within an
equilateral triangle is intended to alert the
user to the presence of important
operating and maintenance (servicing)
instructions in the literature accompany-
ing the product.
CAUTION: TO REDUCE THE RISK OF
ELECTRIC SHOCK, DO NOT REMOVE
COVER (OR BACK). NO USER-SERVICEABLE
PARTS INSIDE. REFER SERVICING TO
QUALIFIED SERVICE PERSONNEL.
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
1 Read these instructions.
2 Keep these instructions.
3 Heed all warnings.
4 Follow all instructions.
5 Do not use this apparatus near water.
6 Clean only with dry cloth.
7 Do not block any ventilation openings. Install in accordance
with the manufacturer’s instructions.
8 Do not install near any heat sources such as radiators, heat
registers, stoves, or other apparatus (including amplifiers)
that produce heat.
9 Do not defeat the safety purpose of the polarized or ground-
ing-type plug.
10 Protect the power cord from being walked on or pinched
particularly at plugs, convenience receptacles, and the point
where they exit from the apparatus.
11 Only use attachments/accessories specified by the manufac-
turer.
12 Unplug this apparatus during lightning
unused for long periods of time.
13 Refer all servicing to qualified service personnel.
. Servicing is required when the apparatus has been
damaged in any way, such as power supply cord or
plug is damaged, liquid has been spilled or objects
have fallen into the apparatus, the apparatus has been
exposed to rain or moisture, does not operate normally,
or has been dropped.
WARNING
TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO
NOT EXPOSE THIS APPARATUS TO RAIN OR MOISTURE.
IMPORTANT SAFETY INSTRUCTIONS
2
Precautions
— For safe operation —
WARNING
Connect this unit’s power cord only to an AC outlet of the
type stated in this Owner’s Manual or as marked on the unit.
Failure to do so is a fire and electrical shock hazard.
Do not allow water to enter this unit or allow the unit to
become wet. Fire or electrical shock may result.
Do not place a container with liquid or small metal objects on
top of this unit. Liquid or metal objects inside this unit are a
fire and electrical shock hazard.
Do not place heavy objects, including this unit, on top of the
power cord. A damaged power cord is a fire and electrical
shock hazard. In particular, be careful not to place heavy
objects on a power cord covered by a carpet.
Do not scratch, bend, twist, pull, or heat the power cord. A
damaged power cord is a fire and electrical shock hazard.
Do not remove the unit’s cover. You could receive an
electrical shock. If you think internal inspection, maintenance,
or repair is necessary, contact your dealer.
Do not modify the unit. Doing so is a fire and electrical
shock hazard.
If lightning begins to occur, turn off the power switch of
the unit as soon as possible, and unplug the power cable
plug from the electrical outlet.
If there is a possibility of lightning, do not touch the power
cable plug if it is still connected. Doing so may be an
electrical shock hazard.
If the power cord is damaged (i.e., cut or a bare wire is
exposed), ask your dealer for a replacement. Using the unit
with a damaged power cord is a fire and electrical shock
hazard.
Should this unit be dropped or the cabinet be damaged, turn
the power switch off, remove the power plug from the AC
outlet, and contact your dealer. If you continue using the
unit without heeding this instruction, fire or electrical
shock may result.
If you notice any abnormality, such as smoke, odor, or
noise, or if a foreign object or liquid gets inside the unit,
turn it off immediately. Remove the power cord from the
AC outlet. Consult your dealer for repair. Using the unit in
this condition is a fire and electrical shock hazard.
CAUTION
Keep this unit away from the following locations:
- Locations exposed to oil splashes or steam, such as near
cooking stoves, humidifiers, etc.
- Unstable surfaces, such as a wobbly table or slope.
- Locations exposed to excessive heat, such as inside a car
with all the windows closed, or places that receive direct
sunlight.
- Locations subject to excessive humidity or dust
accumulation.
Do not place the power cord close to a heater. It may melt,
causing fire or electrical shock.
Hold the power cord plug when disconnecting it from an AC
outlet. Never pull the cord. A damaged power cord is a
potential fire and electrical shock hazard.
Do not touch the power plug with wet hands. Doing so is a
potential electrical shock hazard.
This unit has ventilation holes at the front, rear & top to
prevent the internal temperature rising too high. Do not block
them.
Blocked ventilation holes are a fire hazard.
In particular, do not
- place the unit on its side or upside down.
- place the unit in any poorly-ventilated location such as a
bookcase or closet (other than on the dedicated rack).
- cover the unit with a table cloth or place it on a carpet or
bed.
Allow enough free space around the unit for normal
ventilation.
This should be: 5 cm at the sides, 10 cm behind, and 10 cm
above.
If the airflow is not adequate, the unit will heat up inside and
may cause a fire.
To relocate the unit, turn the power switch off, remove the
power plug from the AC outlet, and remove all connecting
cables. Damaged cables may cause fire or electrical shock.
Use only thick speaker cables when connecting speakers to
amplifier outputs. Use of cables type 40/36 or thicker is
recommended for connecting low impedance speakers to
avoid power loss in the cables, as heavy current flows
through the cables. Using other types of cables is a fire
hazard.
Turn off all musical instruments, audio equipment, and
speakers when connecting to this unit. Use the correct
connecting cables and connect as specified.
Always lower the volume control to minimum before
turning on the power to this unit. A sudden blast of sound
may damage your hearing.
Do not use this amplifier for any purpose other than
driving loudspeakers.
Be sure of proper impedance of 2/4/8 ohm when used for
STEREO/PARALLEL configuration & 4/8 ohm
recommended when used in BRIDGE mode.
If you know you will not use this unit for a long period of
time, such as when going on vacation, remove the power
plug from the AC outlet. Leaving it connected is a
potential fire hazard.
When operating amplifier on a generator, make sure it
is switched “OFF” till generator voltages has stabilized
& then only switch “ON” amplifier.
Installation
Operation
In case an abnormality occurs during operation
Installation
Operation
3
Tips for Safe Operation
The 3 core AC mains cable should be terminated with this
AC mains plug by connecting brown/red wire on live pin
(L), black/blue wire on neutral pin (N) and yellow/green
wire on earth pin (E).
The amplifier must be connected to an AC earthed mains
outlet that can delivered the maximum power required.
The use of extension cables or adaptors should be avoided
as this can jeoparadize correct power delivery to the
amplifier.
All connections must only be carried out or changed
with the amplifier switched OFF. Ensure proper
impedance matching while in use for BRIDGE mode
applications. For continuous safe operation, resultant
impedance of the speakers 8 ohm/4 ohm is recommen-
ded.
For 2 ohm/4 ohm applications, it is recommended
to use speakon connectors only. Use of cable 40/36
or thicker is recommended to prevent power
losses.
The level of input signal should not exceed the
specified input sensitivities. Excessive input signal
levels result in over driving of input circuit which
leads to saturated / distorted output at speaker
terminals.
Do not operate the amplifier with continuously
blinking CLIP LED. The respective volume control
of the channels must be adjusted so that the output
level does not clip and distort. Do not obstruct the
front or back of the amplifier for necessary intake of
air.
4
Contents Page No.
Features / General Description of Product....................................................................6
Front Panel Controls & Features...................................................................................7
Rear Panel Controls & Features....................................................................................8
Input-Output Connections...........................................................................................10
Setup & Operations.....................................................................................................11
Typical Applications....................................................................................................14
Protections & Installations..........................................................................................17
Trouble Shooting.........................................................................................................18
Specifications..............................................................................................................20
Notes............................................................................................................................23
5
Features / General Description of Product
Rugged 19” rack mountable design of chassis.
Low THD and high damping factor for excellent sound quality.
Slide Switches For 1) Mode selection ( Mono / Stereo / Bridge)
2) Sensitivity ( 0.775 V / 1V / 1.4 V)
3) Low - cut (30Hz) (ON / OFF )
4) Ground Lift ( GND / LIFT)
5) Limiter
6) HF Limiter
This owners Manual covers 4 models, DPA 2000, DPA 3200, DPA 4500 & DPA 5000 power amplifiers. through
this manual carefully before beginning use, so that you will be able to take full advantage of amplifier’s superlative features
and enjoy trouble free operation for years to come. After reading through the manual, please store it in a safe place.
Please read
Thank you for your purchase of the STUDIOMASTER DPA Series power amplifiers. These amplifiers fully incorporate
STUDIOMASTER’s renowned technology and offers high reliability, rock solid stability and superb acoustic
characteristics.
Balanced / Unbalanced input signal through parallel XLR in both channels.
Twin tunnel cooling with front to back airflow.
Limiter circuit protects the amplifier and speaker from being over driven because of high input level signal.
Designed with a sophisticated VHF limiter that reduces the risk of HF stress, and protects your speakers, particularly
HF units.
Output termination on 4 way speakon Connectors and Binding posts for each channels.
Indicator LEDs for Signal, Mode Selection.
Clip, Protect, Power ON,
Extensive protection circuitry for Overheat, Overload, DC, Output short circuit.
High current torroidal transformer which provides excellent regulation and minimized hum & noise.
6
*Please retain original packing should you have to return the unit for the repairs.
Front Panel Controls & Features
1 Master switch
2 Power ON indicator light
3 Volume control
4 Signal indicator
5 Clip indicator
6 indicatorProtect
Switches the unit on and off, interrupting both phases.
When lit, this blue LED indicates that amplifier is ON.
Used for adjusting the volume of the channel.
Green LED that indicates the presence of the signal in the final stage. It lights up with signals higher than - 20dB.
This red LED lights up to indicate that the internal limiter has been activated to eliminate clip. When the limiter is
activated, it indicates that the maximum amplification has been reached. When it lights up continuously, this means
there is an excessive signal input.
Red LED that indicates the mute status of the channel and is lit for the following reasons:
switch on delay (3 seconds), presence of continuous voltage on the channel output, short circuit, thermal protection of
the channel, thermal protection of the transformer.
Class H Professional Power Amplifier
-6
-10
-15
-30 -1
-3
-80 0dB
-6
-10
-15
-30 -1
-3
-80 0dB
O
CH 2CH 1
POWER
I
SIGNAL
CLIP
PROTECT
POWER
POWER
Class H Professional Power Amplifier
-6
-10
-15
-30 -1
-3
-80 0dB
-6
-10
-15
-30 -1
-3
-80 0dB
O
SIGNAL
CLIP
POWER
I
PROTECT
CH 2CH 1
1
3
3
44
5
6
56
6
5
424
5
6
3
3
2
1
7
Rear Panel Controls & Features
1 Balanced XLR input
3 CH 1 output speakon connector
2 Link Out
To Cascade amplifiers.
4 CH 2 output speakon connector
5 CH 1 output binding post.
6 CH 2 output binding post.
7 Power cable
8 Configuration switch
9 Air Outlet grill
Use this connector for picking up the amplified signal of CH 1 and signal for bridged configuration.
Use this connector for picking up the amplified signal of CH 1 and signal for bridged configuration.
Use this connector for picking up the amplified signal of CH 2.
Use this connector for picking up the amplified signal of CH 2.
Use this cable for supplying power to unit.
This three way switch configures the amplifier for the three working modes: parallel, stereo and bridge.
The air sucked from the front grills is thrown out from these grills. Do not obstruct the grills. The air filter
whenever necessary.
This XLR connector takes the signal (balanced/unbalanced) for driving the channel. If the signal is unbalanced, pin 2
can be used for the signal and pin 3 connected to the earth.
7
9
6
2
9112 11 4
810
21810 3
14
14 35
513
13
2
21
9 9
1 12 11 467
15
15
DPA-2000
DPA-3200,4500 & 5000
8
0 9 0 3 0 1 0 8 0
30Hz
LOWCUT
HF
PROTECTION
LIMITER
INPUT
GROUND
LIFT
T16A 250VAC
0 9 0 3 0 1 0 8 0
30Hz
LOWCUT
HF
PROTECTION
LIMITER
INPUT
GROUND
LIFT
This switch activates limiter when in ON position. The limiter prevents distortion of the output level when its gets
overloaded. When the output level exceeds its maximum, an internal adjustment will be made to prevent overloading.
The limiter is specially designed to safeguard connected full-range speakers. The high tone piezo drivers of these
speakers are now protected against distortion and harmonic signals which are the result of over steering the amplifier.
When the amplifier is used as a subwoofer amplifier then the limiter has to be switched off to set the extra “punch”.
14 Limiter
It is a protection for the amplifier against HF. In case there is high amplitude HF signal at the output, it shuts down
the amplifier thus protecting the internal circuitry and HF drivers of a speaker system.
Presence of prolonged, large amplitude, high frequency output can damage the speakers as well as the internal circuit
of the amplifier. The HF limiter circuit continuously monitors the output and shuts down the amplifier, if the high
frequency persists for more than 10-15 seconds. The HF limiter has no effect on normal music.
15 HF Limiter
Mains fuse secures the amplifier & wires against defects, Replace this only with the same type & rating.
13 Fuse
9
Low cut switch filters the low frequencies from the input signal. Cut off frequency is 30 Hz when it is selected. The
filter protects the cone of the speakers against unwanted and inaudible low frequencies.
12 Low cut
10 Sensitivity
This switch is used to select sensitivity to either 0.775V, 1V or 1.2V depending on the source.
Allows circuit & chassis grounds to be separated in case of ground loops.
11 Ground lift
Input-Output Connections
FIG. 1 FIG. 2
FIG. 3
FIG. 5 FIG. 6
FIG. 4
PARALLEL / STEREO OUTPUT CONNECTIONS
PARALLEL / STEREO BINDING POST CONNECTIONS BRIDGE MODE BINDING POST CONNECTIONS
UNBALANCED INPUT CONNECTIONSBALANCED INPUT CONNECTIONS
BRIDGE OUTPUT CONNECTIONS
(CH 1 OUTPUT CONNECTOR)
XLR XLR
-STEREO -STEREO
-VE OUTPUT
+VE OUTPUT
+VE OUTPUT
+VE OUTPUT
-VE OUTPUT
-VE OUTPUT
CH1 OUTBINDING POST CH1 OUTBINDING POST
+STEREO/+BRIDGE +STEREO/+BRIDGE
+STEREO/-BRIDGE +STEREO/-BRIDGE
CH2 OUTBINDING POST CH2 OUTBINDING POST
-STEREO -STEREO
10
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