Inter-m DPA-300D User manual

Operation Manual
* Rack mount pro ucts in the Western Hemisphere(North America, South America,
an the Caribbean) o not have han les installe ue to customer preference.
Digital Power Amplifier
DPA-300D/600D
DPA-300DO/600DO

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 e icate to provi ing excellent pro ucts with inherently goo value,
an we are elighte you have purchase one of our pro ucts.
We sincerely trust this pro uct will provi e years of satisfactory service, but if anything is not to your complete
satisfaction, we will en eavor to make things right.
Welcome to Inter-M, an thank you for becoming part of our worl wi e exten e family!
ISK OF ELECT IC SHOCK
DO NOT OPEN
CAutION
CAUTION: TO EDUCE THE ISK OF ELECT IC SHOCK.
DO NOT EMOVE COVE (O BACK).
NO USE -SE VICEABLE PA TS INSIDE.
EFE SE VICING TO QUALIFIED SE VICE PE SONNEL.
WARNING
To prevent fire or shock hazard, do not
expose the unit to rain or moisture.
*WA NING FO YOU P OTECTION PLEASE EAD THE FOLLOWING-WATE AND MOISTU E: 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 WI ING (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 ules. 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.
This symbol 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.
This symbol is intended to alert the user to the
presence of important operation and maintenance
(servicing) instructions in the literature accompanying
the appliance.
Caution: To prevent electric shock do not use this (polarized) plug with
an extension cord, receptacle or other outlet unless the blades
can be fully inserted to prevent blade exposure.
Attentions: Pour prévenir les chocs électriques ne pas utiliser cette
fiche polarisée avec un prolongateur, une prise de courant
on une autre sortie de courant, sauf si les lames peuvent
étre insérées à fond sans en laisser aucune partie à
découvert.

DIGITAL POWER AMPLIFIER
1
DPA-300D/600D, DPA-300DO/600DO
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
Proce ures....................................................................................................................................17
Schematic.....................................................................................................................................17
Parts List .......................................................................................................................................17
Variations and Options ...............................................................................................................17
Warranty .......................................................................................................................................17

DIGITAL POWER AMPLIFIER
2DPA-300D/600D, DPA-300DO/600DO
Installation
Unpacking
Unpacking
Although your DPA-300D/600D, DPA-300DO/600DO is neither complicate nor ifficult to operate, we
recommen you take a few minutes to rea this brief manual an familiarize yourself with the important
information regar ing pro uct features, setup an operation.
As with most electronic evices, we strongly recommen you retain the original packaging. In the unlikely event
the pro uct must be returne for servicing, the original packaging (or reasonable equivalent) is require .
Installation
Environment
Never place this pro uct in an environment which coul alter its performance or re uce its service life. Such
environments usually inclu e high levels of heat, ust, moisture, an vibration.
IMPORTANT SAFETY INSTRUCTIONS
1. Rea these instructions.
2. Keep these instructions.
3. Hee all warnings.
4. Follow all instructions.
5. Do not use this apparatus near water.
6. Clean only with ry cloth.
7. Do not block any ventilation openings. Install in accor ance with the manufacturer’s instructions.
8. Do not install near any heat sources such as ra iators, heat registers, stoves, or other apparatus (inclu ing
amplifiers) that pro uce heat.
9. Do not efeat the safety purpose of the polarize or groun ing-type plug. A polarize plug has two bla es
with one wi er than the other. A groun ing type plug has two bla es an a thir groun ing prong. The wi e
bla e or the thir prong are provi e for your safety. If the provi e plug oes not fit into your outlet, consult
an electrician for replacement of the obsolete outlet.
10. Protect the power cor from being walke on or pinche particularly at plugs, convenience receptacles, an
the point where they exit from the apparatus.
11. Only use attachments/accessories specifie by the manufacturer.
12. Use only with the cart, stan , tripo , bracket, or table specifie by the manufacturer, or sol with the apparatus.
When a cart is use , use caution when moving the cart/apparatus combination to avoi injury from tip-over.
13. Unplug this apparatus uring lightning storms or when unuse for long perio s of time.
14. Refer all servicing to qualifie service personnel. Servicing is require when the
apparatus has been amage in any way, such as power-supply cor or plug is
amage , liqui has been spille or objects have fallen into the apparatus, the
apparatus has been expose to rain or moisture, oes not operate normally, or has
been roppe .
S3125A

DIGITAL POWER AMPLIFIER
3
DPA-300D/600D, DPA-300DO/600DO
Features
Features
- High Performance Class-D Power PA Amplifier
High performance 2CH Class-D Power amplifiers pro uce 300/600W rate power each channel.
- Emergency Power Back Up (2 VDC) capability
The unit operates on a 24VDC battery power supply for emergency back up without UPS (DPA-DO mo els are
not inclu e with Emergency Power Back Up (24VDC)).
- Rated Output Power Via DC Backup Supply
Output power can be maintaine as AC power when 24VDC power supplie .
- Advanced Power Circuitry Design
The combination Class-D type amplification circuitry combine with SMPS creates a high efficiency amplifier
offering re uce power consumption an low heat issipation an weight.
- High Quality Sound Design
The total harmonic istortion is re uce to less than 0.03% THD, with a high signal to noise S /N ratio of over
103 B
- Advanced Protection Circuitry
A vance protection circuitry guar s against overheating, shorte outputs, DC output, overloa s an
mismatche power
- A Variety of operation Indicators
Signal, -10 B signal level, Clip, Protection an system power (AC, DC, STBY) in icators.
- Balanced Input
This connection is use 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 turne on or off from a istance or other evice via ry contact
closure.
- PRIORITY Input
PGM is interrupte an over ri en by the Priority input, when a contact closure is receive on the PRI select
terminal. This is I eal for Emergency message broa casting applications.
Accessories
AC Power Cor 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

DIGITAL POWER AMPLIFIER
DPA-300D/600D, DPA-300DO/600DO
Front Panel
Front Panel
1. SYSTEM POWER INDICATORS
When Power switch is on, AC or DC LED will illuminate epen ing 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 turne off.
2. SIGNAL INDICATORS (CH1, CH2)
The LEDS in icate the amplifier’s output signal levels.
SIG : Green, -10 B : Green, Clip : Yellow, PROTECT : Re
3. VOLUME CONTROL (CH1, CH2)
Turn the volume controls clockwise to increase gain an counterclockwise to ecrease gain.
. 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.
DPA
DIGITAL POWER AMPLIFIER
600D
CH 1 CH 2
Power SW Power LED AC LED STBY LED DC LED
AC/DC SW ON ON ON OFF OFF
SW OFF OFF OFF ON OFF
AC only SW ON ON ON OFF OFF
SW OFF OFF OFF ON OFF
DC only SW ON ON OFF OFF ON
SW OFF ON OFF OFF ON

DIGITAL POWER AMPLIFIER
5
DPA-300D/600D, DPA-300DO/600DO
Rear Panel
Rear Panel
1. AC MAINS (AC INLET)
It accepts a stan ar IEC mains cable, provi e
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 mo els are not inclu e with Emergency Power Back Up (24VDC))
3. AC POWER REMOTE
This terminal allows the amplifier to be turne on or off from a istance or other evice.
. COOLING VENTS
Air flow is front to back. DO NOT block front or rear air vents.
5. PRIORITY INPUT AND CONTACT CLOSURE
Each amplifier mo ule has 2 au io inputs. The Primary program input, PGM an Priority input, PRI. The
primary regular broa cast program input, PGM is interrupte an over ri en by the Priority input, PRI,
when a contact closure is receive on the PRI select terminal. This is I eal for Emergency message
broa casting 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.
1 2 3 4 5 6
789
70V
+ - G+ - G
CH 2 CH 1
PGM INPUT
CH 2 CH 1
OUTPUT
AC POWER REMOTE
100V

DIGITAL POWER AMPLIFIER
6DPA-300D/600D, DPA-300DO/600DO
8. OUTPUT VOLTAGE SELECTOR
This two-position switch is use to select a output voltage (100V or 70V).
9. PGM INPUT CONNECTOR (CH1, CH2)
Balance 3-pin terminal block connector accept the source input.

DIGITAL POWER AMPLIFIER
7
DPA-300D/600D, DPA-300DO/600DO
Speaker Connection
Speaker Connection
Before connecting speakers to the unit, be sure to isconnect the AC power cable. Make certain that the total
impe ance is not less than the rate impe ance in icate .
※Caution: 1. Make sure that the total impe ance oes not equal or less than the rate impe ance.
2. Do not connects a speaker has lower impe ance than rate impe ance, It may cause the
problem to unit.
3. Do not put the speaker cable close to input signal cable.
CH 2 CH 1
OUTPUT
10W 10W 10W 10W
....
10W 10W 10W 10W
....
Speaker Output Speaker Impe ance
100V / 33.3Ω
300W 70V / 16.3Ω
49V / 8Ω
100V / 16.6Ω
600W 70V / 8.1Ω
69.3V / 8Ω

DIGITAL POWER AMPLIFIER
8DPA-300D/600D, DPA-300DO/600DO
Applications
Applications
+ - G+ - G
CH 2 CH 1
PGM INPUT
CH 2 CH 1
OUTPUT
AC POWER REMOTE
DPA-300D/600D

DIGITAL POWER AMPLIFIER
9
DPA-300D/600D, DPA-300DO/600DO
Block Diagram
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(-)
DPA-300D

DIGITAL POWER AMPLIFIER
10 DPA-300D/600D, DPA-300DO/600DO
DPA-600D
-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-300DO
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(-)
PFC
-VA +VA
-HV
+HV
ST-BY
MAIN
RECTIFIER
AC
SMPS
DIGITAL POWER AMPLIFIER
11
DPA-300D/600D, DPA-300DO/600DO

DIGITAL POWER AMPLIFIER
12 DPA-300D/600D, DPA-300DO/600DO
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(-)
-VA +VA
-HV
+HV
AC
ST-BY
MAIN
RECTIFIER
SMPS
DPA-600DO

DIGITAL POWER AMPLIFIER
13
DPA-300D/600D, DPA-300DO/600DO
Specifications
Specifications
DPA-300D DPA-600D
Rate Output Power (THD 0.1%, AES17) 300W x 2 600W x 2
Peak Power 350W/CH 680W/CH
Output Level/Impe ance
100V/33.3Ω100V/16.6Ω
70V/16.3Ω70V/8.1Ω
49V/8Ω69.3V/8Ω
Input Sensitivity 1V/10kΩ
THD (AES17) Rate Power Less than 0.1%
1/3 Power Less than 0.03%
S/N (20kHz LPF) More than 103 B
Frequency Response (1W, ±3 B) 50Hz~20kHz
Operating Temperature -10°C ~ +40°C
Operating Power 120VAC, 60Hz, 220-240VAC, 50/60Hz
24VDC
Power Consumption (1/8 Power) 130W 250W
Weight (SET) 7.1kg/15.7lb 8.1kg/17.9lb
Dimensions (SET) 482(W) x 88(H) x 397(D)mm
19(W) x 3.5(H) x 15.6(D)in
482(W) x 88(H) x 450(D)mm
19(W) x 3.5(H) x 17.7(D)in
* Design an specification are subject to be change for the improvement of pro uct quality without pre notice.

DIGITAL POWER AMPLIFIER
1 DPA-300D/600D, DPA-300DO/600DO
DPA-300DO DPA-600DO
Rate Output Power (THD 0.1%, AES17) 300W x 2 600W x 2
Peak Power 350W/CH 680W/CH
Output Level/Impe ance
100V/33.3Ω100V/16.6Ω
70V/16.3Ω70V/8.1Ω
49V/8Ω69.3V/8Ω
Input Sensitivity 1V/10kΩ
THD (AES17) Rate Power Less than 0.1%
1/3 Power Less than 0.03%
S/N (20kHz LPF) More than 103 B
Frequency Response (1W, ±3 B) 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 an specification are subject to be change for the improvement of pro uct quality without pre notice.

DIGITAL POWER AMPLIFIER
15
DPA-300D/600D, DPA-300DO/600DO
※ DIMENSIONS
DPA-300D, DPA-300DO/600DO
440
367
482
88

DIGITAL POWER AMPLIFIER
16 DPA-300D/600D, DPA-300DO/600DO
DPA-600D
440
420
482
88

DIGITAL POWER AMPLIFIER
17
DPA-300D/600D, DPA-300DO/600DO
Service
Service
Procedures
Take steps to insure the problem is not relate to operator error or other pro ucts within the system. Information
provi e in the troubleshooting portion of this manual may help with this process. Once it is certain that the
problem is relate to the pro uct contact your warranty provi er as escribe in the warranty section of this
manual.
Schematic
A Schematic is available by contacting your warranty provi er.
Parts List
A Parts List is available by contacting your warranty provi er.
Variations and Options
Variations and Options
Variations
Pro ucts supplie through legitimate sources are compatible with local AC power requirements.
Options
No optional items are available for this pro uct.
Warranty
Warranty
Warranty terms an con itions vary by country an may not be the same for all pro ucts. Terms an con itions
of warranty for a given pro uct may be etermine first by locating the appropriate country which the pro uct
was purchase in, then by locating the pro uct type.
To obtain specific warranty information an available service locations contact Inter-M irectly or the
authorize Inter-M Distributor for your specific country or region.

MADE IN KOREA
August 2013 133396
Inter-M, Lt . (Korea) began operations in 1983.
Since then, Inter-M has grown to become one of the largest manufacturers
of professional au io an commercial soun electronics equipment in the worl .
Inter-M has gaine worl wi e recognition for its own bran e pro ucts,
as well as private label manufacturing of electronics sol un er 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 an offices in Korea an China,
an sales an marketing operations locate in Japan, Europe, an the U.S.A.
With more than 850 employees aroun the globe,
Inter-M is well-poise for further growth an expansion.
Inter-M Americas, INC.
13875 ARTESIA BLVD. CERRITOS, CA 90703 USA
TEL : [phone], FAX : [phone]
Home Page : http://www.inter-m.net, E-mail : [email protected]
Inter-M Corporation
SEOUL OFFICE:653-5 BANGHAK-DONG, DOBONG-GU, SEOUL, KOREA
TEL : [phone]~8, FAX : [phone]
Home Page : http://www.inter-m.com, E-mail : [email protected]