Operation Manual
Digital Power Amplifier
DPA-300D/600D
DPA-300DO/600DO
* Rack mount products in the Western Hemisphere(North America, South America,
and the Caribbean) do not have handles installed due to customer preference.
DIGITAL POWER AMPLIFIER
Welcome
Welcome
A personal welcome to you from the management and employees of Inter-M
All of the co-workers here at Inter-M are dedicated to providing excellent products with inherently good value,
and we are delighted you have purchased one of our products.
We sincerely trust this product will provide years of satisfactory service, but if anything is not to your complete
satisfaction, we will endeavor to make things right.
Welcome to Inter-M, and thank you for becoming part of our worldwide extended family!
This s ym bol is intende d to a lert the user to t he
CAutION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
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: To prevent electric shock do not use this (polarized) plug with
Attentions: Pour prévenir les chocs électriques ne pas utiliser cette
WARNING
To prevent fire or shock hazard, do not
expose the unit to rain or moisture.
*WARNING FOR YOUR PROTECTION PLEASE READ THE FOLLOWING-WATER AND MOISTURE: Unit should not be used near water(e.g.
near a bathtub, washbowl, kitchen sink, laundry tub, in a wet basement, or near a swimming pool, etc). Care should be taken so than objects do
not fall and liquids are not spilled into the enclosure through openings.
*CLASS 2 WIRING (Adjacent to speaker terminal): The speaker output of this apparatus can exceed 10 Watts and could be a shock injury.
Connection to speakers should be performed by a skilled person.
*Do not install this equipment in a confined space such as a book case or similar unit.
*This apparatus shall not be exposed to dripping or splashing and no objects filled with liquids, such vases, shall be placed on the apparatus.
*This apparatus shall be connected to a mains socket outlet with a protective earthing connection.
It has heed to be easy to disconnect the device. To disconnect the device from power, separate AC input cable from inlet or unplug the AC Cord.
*
CAutION
*These servicing instructions are for use by qualified service personnel only. To reduce the risk of electric shock, do not perform any servicing
other than that contained in the operating instructions unless you are qualified to do so.
NOtE
*This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC Rules. These limits are
designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment
generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful
interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will
be required to correct the interference at his own expense.
presence of uninsulated “dangerous voltage” within
the prod uct’s e nclosure that may be of suff icient
magnitude to constitute a risk of electric shock to
persons.
This s ym bol is intende d to a lert the user to t he
presence of important operation and maintenance
(servicing) instructions in the literature accompanying
the appliance.
an extension cord, receptacle or other outlet unless the blades
can be fully inserted to prevent blade exposure.
fiche polarisée avec un prolongateur, une prise de courant
on une autre sortie de courant, sauf si les lames peuvent
étre ins ér ées à fo nd sans e n laisser auc un e pa rtie à
découvert.
DIGITAL POWER AMPLIFIER
Contents
Contents
Unpacking .......................................................................................................................................2
Installation
Environment....................................................................................................................................2
Important Safety Instructions.............................................................................................................2
Features............................................................................................................................................3
Front Panel ......................................................................................................................................4
Rear Panel .......................................................................................................................................5
Speaker Connection.......................................................................................................................7
Applications ....................................................................................................................................8
Block Diagram ................................................................................................................................9
Specifications ................................................................................................................................13
Service
Procedures....................................................................................................................................17
Schematic.....................................................................................................................................17
Parts List .......................................................................................................................................17
Variations and Options ...............................................................................................................17
Warranty .......................................................................................................................................17
DPA-300D/600D, DPA-300DO/600DO
1
DIGITAL POWER AMPLIFIER
Unpacking
Unpacking
Although your DPA-300D/600D, DPA-300DO/600DO is neither complicated nor difficult to operate, we
recommend you take a few minutes to read this brief manual and familiarize yourself with the important
information regarding product features, setup and operation.
As with most electronic devices, we strongly recommend you retain the original packaging. In the unlikely event
the product must be returned for servicing, the original packaging (or reasonable equivalent) is required.
Installation
Installation
Environment
Never place this product in an environment which could alter its performance or reduce its service life. Such
environments usually include high levels of heat, dust, moisture, and vibration.
IMPORTANT SAFETY INSTRUCTIONS
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 grounding-type plug. A polarized plug has two blades
with one wider than the other. A grounding type plug has two blades and a third grounding prong. The wide
blade or the third prong are provided for your safety. If the provided plug does not fit into your outlet, consult
an electrician for replacement of the obsolete outlet.
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 manufacturer.
12. Use only with the cart, stand, tripod, bracket, or table specified by the manufacturer, or sold with the apparatus.
When a cart is used, use caution when moving the cart/apparatus combination to avoid injury from tip-over.
13. Unplug this apparatus during lightning storms or when unused for long periods of time.
14. 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.
S3125A
2
DPA-300D/600D, DPA-300DO/600DO
DIGITAL POWER AMPLIFIER
Features
Features
- High Performance Class-D Power PA Amplifier
High performance 2CH Class-D Power amplifiers produce 300/600W rated power each channel.
- Emergency Power Back Up (24VDC) capability
The unit operates on a 24VDC battery power supply for emergency back up without UPS (DPA-DO models are
not included with Emergency Power Back Up (24VDC)).
- Rated Output Power Via DC Backup Supply
Output power can be maintained as AC power when 24VDC power supplied.
- Advanced Power Circuitry Design
The combination Class-D type amplification circuitry combined with SMPS creates a high efficiency amplifier
offering reduced power consumption and low heat dissipation and weight.
- High Quality Sound Design
The total harmonic distortion is reduced to less than 0.03% THD, with a high signal to noise S /N ratio of over
103dB
- Advanced Protection Circuitry
Advanced protection circuitry guards against overheating, shorted outputs, DC output, overloads and
mismatched power
- A Variety of operation Indicators
Signal, -10dB signal level, Clip, Protection and system power (AC, DC, STBY) indicators.
- Balanced Input
This connection is used to ensure the lowest noise operation which eliminates the common noise from the cable.
- Remote Power ON/OFF
The remote power allows the amplifier to be turned on or off from a distance or other device via dry contact
closure.
- PRIORITY Input
PGM is interrupted and over ridden by the Priority input, when a contact closure is received on the PRI select
terminal. This is Ideal for Emergency message broadcasting applications.
Accessories
AC Power Cord x1
6P Terminal Block x1
4P Terminal Block x1
2P Terminal Block (Ac Remote power) x1
8P Terminal Block x1
Operation Manual x1
Screws for Rack mount Bracket x4
DPA-300D/600D, DPA-300DO/600DO
3
DIGITAL POWER AMPLIFIER
DPA
DIGITAL POWER AMPLIFIER
600D
CH 1 CH 2
Front Panel
Front Panel
1. SYSTEM POWER INDICATORS
When Power switch is on, AC or DC LED will illuminate depending on input Power source. When Power
switch is off, STBY LED will illuminte.
※NOTE: During operation of DC, amplifier is keep going to work even if the switch of power is turned off.
Power SW Power LED AC LED STBY LED DC LED
SW ON ON ON OFF OFF
AC/DC
SW OFF OFF OFF ON OFF
SW ON ON ON OFF OFF
AC only
SW OFF OFF OFF ON OFF
SW ON ON OFF OFF ON
DC only
SW OFF ON OFF OFF ON
2. SIGNAL INDICATORS (CH1, CH2)
The LEDS indicate the amplifier’s output signal levels.
SIG : Green, -10dB : Green, Clip : Yellow, PROTECT : Red
3. VOLUME CONTROL (CH1, CH2)
Turn the volume controls clockwise to increase gain and counterclockwise to decrease gain.
4. COOLING VENTS
Air flow is front to back. DO NOT block front or rear air vents.
5. POWER SWITCH
Push on/off switch. When Power switch is on, BLUE LED will illuminate.
4
DPA-300D/600D, DPA-300DO/600DO
Rear Panel
1 2 3 4 5 6
789
70V
+
-
G +-G
CH 2 CH 1
P
GM INPUT
CH 2 CH 1
O
UTPUT
AC POWER REMOTE
100V
Rear Panel
DIGITAL POWER AMPLIFIER
1. AC MAINS (AC INLET)
It accepts a standard IEC mains cable, provided
2. DC INPUT TERMINAL
Emergency DC back up power (24VDC) terminal. When AC power is cut off, The unit will operate with DC
power from spare battery pack.
(DPA-DO models are not included with Emergency Power Back Up (24VDC))
3. AC POWER REMOTE
This terminal allows the amplifier to be turned on or off from a distance or other device.
4. COOLING VENTS
Air flow is front to back. DO NOT block front or rear air vents.
5. PRIORITY INPUT AND CONTACT CLOSURE
Each amplifier module has 2 audio inputs. The Primary program input, PGM and Priority input, PRI. The
primary regular broadcast program input, PGM is interrupted and over ridden by the Priority input, PRI,
when a contact closure is received on the PRI select terminal. This is Ideal for Emergency message
broadcasting applications.
6. PRI VOLUME CONTROL
It controls the mute level of all other input signal when the PRI IN signal is present.
7. OUTPUT TERMINAL (CH1, CH2)
Speaker Output Terminal with Euro Block.
DPA-300D/600D, DPA-300DO/600DO
5
DIGITAL POWER AMPLIFIER
8. OUTPUT VOLTAGE SELECTOR
his two-position switch is used to select a output voltage (100V or 70V).
T
9. PGM INPUT CONNECTOR (CH1, CH2)
Balanced 3-pin terminal block connector accept the source input.
6
DPA-300D/600D, DPA-300DO/600DO
DIGITAL POWER AMPLIFIER
C
H 2CH 1
OUTPUT
1
0W 10W 10W 10W
....
1
0W 10W 10W 10W
....
Speaker Connection
Speaker Connection
Before connecting speakers to the unit, be sure to disconnect the AC power cable. Make certain that the total
impedance is not less than the rated impedance indicated.
※Caution: 1. Make sure that the total impedance does not equal or less than the rated impedance.
Speaker Output Speaker Impedance
100V / 33.3Ω
300W
70V / 16.3Ω
49V / 8Ω
100V / 16.6Ω
600W
70V / 8.1Ω
69.3V / 8Ω
2. Do not connects a speaker has lower impedance than rated impedance, It may cause the
problem to unit.
3. Do not put the speaker cable close to input signal cable.
DPA-300D/600D, DPA-300DO/600DO
7
DIGITAL POWER AMPLIFIER
+
-
G +-G
CH 2 CH 1
PGM INPUT
CH 2 CH 1
OUTPUT
AC POWER REMOTE
Applications
Applications
8
DPA-300D/600D, DPA-300DO/600DO
DPA-300D/600D
Block Diagram
SMPS
AC
DC
DC-DC
RECTIFIER
MAIN
ST-BY
+HV
-HV
+VA
-VA
PFC
PWM
PGM2+
PGM2-
GND
PGM INPUT
PGM2 VOLUME
PRI+
PRI-
GND
PRI
COM
1
PRI SELECT
0dB
0dB
PRI VOLUME
+12dB
+12dB
P/C
LPF 35kHz GAIN= 0/-3dB
100/70 Vrm
PROTECTION
OCP, OTP
CLIP(YEL)
SIG(GRN)
-10dB(GRN)
100 / 70V SWITCH
PGM/PRI TOGGLE
2nd ORDER LPF
FAN
FAN CONTROL
FAN START 65ŭ
PROTECT MORE THAN 85ŭ
TEMPERATURE DETECTION
+HV
-HV
PGM1+
PGM1-
GND
2
PWM
PGM1 VOLUME
SPEAKER OUTPUT
0dB
+12dB
LPF 35kHz GAIN= 0/-3dB
PROTECTION
OCP, OTP
CLIP(YEL)
SIG(GRN)
-10dB(GRN)
100 / 70V SWITCH
PGM/PRI TOGGLE
2nd ORDER LPF
FAN
FAN CONTROL
FAN START 65ŭ
PROTECT MORE THAN 85ŭ
TEMPERATURE DETECTION
+HV
-HV
CH1(+)
CH1(-)
CH2(+)
CH2(-)
Block Diagram
DPA-300D
DIGITAL POWER AMPLIFIER
DPA-300D/600D, DPA-300DO/600DO
9
DIGITAL POWER AMPLIFIER
-VA
+VA
-HV
+HV
DC
AC
ST-BY
MAIN
RECTIFIER
DC-DC
SMPS
PWM
PGM2+
PGM2-
GND
PGM INPUT
PGM2 VOLUME
PRI+
PRI-
GND
PRI
COM
1
PRI SELECT
0dB
0dB
PRI VOLUME
+12dB
+12dB
P/C
LPF 35kHz GAIN= 0/-3dB
100/70 V
PROTECTION
OCP, OTP
CLIP(YEL)
SIG(GRN)
-10dB(GRN)
100 / 70V SWITCH
PGM/PRI TOGGLE
2nd ORDER LPF
FAN
FAN CONTROL
FAN START 65ŭ
PROTECT MORE THAN 85ŭ
TEMPERATURE DETECTION
+HV
-HV
PGM1+
PGM1-
GND
2
PWM
PGM1 VOLUME
SPEAKER OUTPUT
0dB
+12dB
LPF 35kHz GAIN= 0/-3dB
PROTECTION
OCP, OTP
CLIP(YEL)
SIG(GRN)
-10dB(GRN)
100 / 70V SWITCH
PGM/PRI TOGGLE
2nd ORDER LPF
FAN
FAN CONTROL
FAN START 65ŭ
PROTECT MORE THAN 85ŭ
TEMPERATURE DETECTION
+HV
-HV
CH1(+)
CH1(-)
CH2(+)
CH2(-)
DPA-600D
10
DPA-300D/600D, DPA-300DO/600DO
DPA-300DO
PWM
PGM2+
PGM2-
GND
PGM2 VOLUME
PRI+
PRI-
GND
PRI
COM
1
PRI SELECT
0dB
0dB
PRI VOLUME
+12dB
+12dB
P/C
LPF 35kHz GAIN= 0/-3dB
100/70 Vrm
PROTECTION
OCP, OTP
CLIP(YEL)
SIG(GRN)
-10dB(GRN)
100 / 70V SWITCH
PGM/PRI TOGGLE
2nd ORDER LPF
FAN
FAN CONTROL
FAN START 65ŭ
PROTECT MORE THAN 85ŭ
TEMPERATURE DETECTION
+HV
-HV
PGM1+
PGM1-
GND
2
PWM
PGM1 VOLUME
SPEAKER OUTPUT
0dB
+12dB
LPF 35kHz GAIN= 0/-3dB
PROTECTION
OCP, OTP
CLIP(YEL)
SIG(GRN)
-10dB(GRN)
100 / 70V SWITCH
PGM/PRI TOGGLE
2nd ORDER LPF
FAN
FAN CONTROL
FAN START 65ŭ
PROTECT MORE THAN 85ŭ
TEMPERATURE DETECTION
+HV
-HV
CH1(+)
CH1(-)
CH2(+)
CH2(-)
PFC
-VA
+VA
-HV
+HV
ST-BY
MAI
N
RECTIFIER
AC
SMPS
DIGITAL POWER AMPLIFIER
DPA-300D/600D, DPA-300DO/600DO
11
DIGITAL POWER AMPLIFIER
PWM
PGM2+
PGM2-
GND
PGM2 VOLUME
PRI+
PRI-
GND
PRI
COM
1
PRI SELECT
0dB
0dB
PRI VOLUME
+12dB
+12dB
P/C
LPF 35kHz GAIN= 0/-3dB
100/70 Vrm
PROTECTION
OCP, OTP
CLIP(YEL)
SIG(GRN)
-10dB(GRN)
100 / 70V SWITCH
PGM/PRI TOGGLE
2nd ORDER LPF
FAN
FAN CONTROL
FAN START 65ŭ
PROTECT MORE THAN 85ŭ
TEMPERATURE DETECTION
+HV
-HV
PGM1+
PGM1-
GND
2
PWM
PGM1 VOLUME
SPEAKER OUTPUT
0dB
+12dB
LPF 35kHz GAIN= 0/-3dB
PROTECTION
OCP, OTP
CLIP(YEL)
SIG(GRN)
-10dB(GRN)
100 / 70V SWITCH
PGM/PRI TOGGLE
2nd ORDER LPF
FAN
FAN CONTROL
FAN START 65ŭ
PROTECT MORE THAN 85ŭ
TEMPERATURE DETECTION
+HV
-HV
CH1(+)
CH1(-)
CH2(+)
CH2(-)
-VA
+VA
-HV
+HV
AC
ST-BY
MAIN
RECTIFIER
SMPS
DPA-600DO
12
DPA-300D/600D, DPA-300DO/600DO
DIGITAL POWER AMPLIFIER
Specifications
Specifications
DPA-300D DPA-600D
Rated Output Power (THD 0.1%, AES17) 300W x 2 600W x 2
Peak Power 350W/CH 680W/CH
100V/33.3Ω 100V/16.6Ω
Output Level/Impedance
Input Sensitivity 1V/10kΩ
Rated Power Less than 0.1%
THD (AES17)
1/3 Power Less than 0.03%
S/N (20kHz LPF) More than 103dB
Frequency Response (1W, ±3dB) 50Hz~20kHz
Operating Temperature -10°C ~ +40°C
Operating Power
Power Consumption (1/8 Power) 130W 250W
Weight (SET) 7.1kg/15.7lb 8.1kg/17.9lb
Dimensions (SET)
* Design and specification are subject to be changed for the improvement of product quality without pre notice.
482(W) x 88(H) x 397(D)mm
19(W) x 3.5(H) x 15.6(D)in
70V/16.3Ω 70V/8.1Ω
49V/8Ω 69.3V/8Ω
120VAC, 60Hz, 220-240VAC, 50/60Hz
24VDC
482(W) x 88(H) x 450(D)mm
19(W) x 3.5(H) x 17.7(D)in
DPA-300D/600D, DPA-300DO/600DO
13
DIGITAL POWER AMPLIFIER
DPA-300DO DPA-600DO
Rated Output Power (THD 0.1%, AES17) 300W x 2 600W x 2
Peak Power 350W/CH 680W/CH
100V/33.3Ω 100V/16.6Ω
Output Level/Impedance
Input Sensitivity 1V/10kΩ
Rated Power Less than 0.1%
THD (AES17)
1/3 Power Less than 0.03%
S/N (20kHz LPF) More than 103dB
Frequency Response (1W, ±3dB) 50Hz~20kHz
Operating Temperature -10°C ~ +40°C
Operating Power 120VAC, 60Hz, 220-240VAC, 50/60Hz
Power Consumption (1/8 Power) 130W 250W
Weight (SET) 6.7kg/14.8lb
Dimensions (SET) 482(W) x 88(H) x 397(D)mm / 19(W) x 3.5(H) x 15.6(D)in
* Design and specification are subject to be changed for the improvement of product quality without pre notice.
70V/16.3Ω 70V/8.1Ω
49V/8Ω 69.3V/8Ω
14
DPA-300D/600D, DPA-300DO/600DO
※ DIMENSIONS
440
367
482
88
PA-300D, DPA-300DO/600DO
D
DIGITAL POWER AMPLIFIER
DPA-300D/600D, DPA-300DO/600DO
15
DIGITAL POWER AMPLIFIER
440
420
482
88
PA-600D
D
16
DPA-300D/600D, DPA-300DO/600DO
DIGITAL POWER AMPLIFIER
Service
Service
Procedures
Take steps to insure the problem is not related to operator error or other products within the system. Information
provided in the troubleshooting portion of this manual may help with this process. Once it is certain that the
problem is related to the product contact your warranty provider as described in the warranty section of this
manual.
Schematic
A Schematic is available by contacting your warranty provider.
Parts List
A Parts List is available by contacting your warranty provider.
Variations and Options
Variations and Options
Variations
Products supplied through legitimate sources are compatible with local AC power requirements.
Options
No optional items are available for this product.
Warranty
Warranty
Warranty terms and conditions vary by country and may not be the same for all products. Terms and conditions
of warranty for a given product may be determined first by locating the appropriate country which the product
was purchased in, then by locating the product type.
To obtain specific warranty information and available service locations contact Inter-M directly or the
authorized Inter-M Distributor for your specific country or region.
DPA-300D/600D, DPA-300DO/600DO
17
Inter-M, Ltd. (Korea) began operations in 1983.
Since then, Inter-M has grown to become one of the largest manufacturers
of professional audio and commercial sound electronics equipment in the world.
Inter-M has gained worldwide recognition for its own branded products,
as well as private label manufacturing of electronics sold under other names (OEM).
The company is no longer just a Korean company, but rather a global company
that is truly international in scope, with factories and offices in Korea and China,
and sales and marketing operations located in Japan, Europe, and the U.S.A.
With more than 850 employees around the globe,
Inter-M is well-poised for further growth and expansion.
Inter-M Americas, INC.
13875 ARTESIA BLVD. CERRITOS, CA 90703 USA
TEL : +1-562-921-0313, FAX : +1-562-921-0370
Home Page : http://www.inter-m.net, E-mail : info@inter-m.net
Inter-M Corporation
SEOUL OFFICE:653-5 BANGHAK-DONG, DOBONG-GU, SEOUL, KOREA
TEL : +82-2-2289-8140~8, FAX : +82-2-2289-8149
Home Page : http://www.inter-m.com, E-mail : overseas@inter-m.com
MADE IN KOREA
August 2013 133396
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