Inter-M DPA-430H User Manual

Operation Manual

Multi Channel Power Amplifier

DPA-430H

MULTI CHANNEL 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 symbol is intend ed to aler t the user to the

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.

*
*

The socket-outlet shall be installed near the equipment and shall be easily accessible.

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 enclos ure t hat m ay be of suffi cient
magnitude to constitute a risk of electric shock to
persons.

This symbol is intend ed to aler t the user to the
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 insérées à fon d sa ns en laisser auc une par tie à
découvert.

MULTI CHANNEL POWER AMPLIFIER

Contents

Contents

Unpacking .......................................................................................................................................2

Installation

Environment....................................................................................................................................2

Important Safety Instructions.............................................................................................................2

Features............................................................................................................................................3

Accessories.....................................................................................................................................3

Precautions......................................................................................................................................4

Installation Precautions .................................................................................................................4

Front Panel ......................................................................................................................................5

Rear Panel .......................................................................................................................................7

Volume Range Setting ...................................................................................................................8

Connecting Speakers.....................................................................................................................9

Applications ..................................................................................................................................10

Block Diagram ..............................................................................................................................11

Specifications ................................................................................................................................12

Dimensions ...................................................................................................................................13

Service............................................................................................................................................14

Variations and Options ...............................................................................................................14

Warranty .......................................................................................................................................14

DPA-430H

1

MULTI CHANNEL POWER AMPLIFIER

S3125A

Unpacking

Unpacking

Although your DPA-430H 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 to 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-430H

MULTI CHANNEL POWER AMPLIFIER

Features

Features

Features

- 1U Rack Size

- Multi channel power amplifier, 300W x 4 channel (100V/33.3Ω or 70V/16.3Ω)

- Independent SMPS power supply for each channel

- Low power consumption, low heat dissipation and light weight

- High pass filter switch (–3dB at 65Hz/400Hz)

- Protection circuitry (over heat, over current, speaker short, DC output)

- Balanced input

Accessories

- AC power cord x1

- 3P Terminal Block x 4

- 2P Terminal Block x 4

- Rack mount screws x 4

- Foot x 4

DPA-430H

3

MULTI CHANNEL POWER AMPLIFIER

Blank panel

POWER

PROT

VOLUME

MIN MAX

HPF

CLIP-10dB -30dB

4

00Hz
65Hz

4

00Hz
65Hz

4

00Hz
65Hz

4

00Hz
65Hz

CH 1

PROT

VOLUME

MIN MAX

HPF

CLIP-10dB -30dB

CH 2

PROT

VOLUME

MIN MAX

HPF

CLIP-10dB -30dB

CH 3

PROT

VOLUME

MIN MAX

HPF

CLIP-10dB -30dB

CH 4

POWER

P

ROT

VOLUME

MIN MAX

HPF

C

LIP-10dB -30dB

400Hz

6

5Hz

400Hz

6

5Hz

400Hz

6

5Hz

400Hz

6

5Hz

CH 1

P

ROT

VOLUME

MIN MAX

HPF

C

LIP-10dB-30dB

CH 2

P

ROT

VOLUME

MIN MAX

HPF

C

LIP-10dB-30dB

CH 3

P

ROT

VOLUME

MIN MAX

HPF

C

LIP-10dB-30dB

CH 4

POWER

P

ROT

VOLUME

MIN MAX

HPF

C

LIP-10dB -30dB

400Hz
65Hz

400Hz
65Hz

400Hz
65Hz

400Hz
65Hz

CH 1

P

ROT

VOLUME

MIN MAX

HPF

C

LIP-10dB-30dB

CH 2

P

ROT

VOLUME

MIN MAX

HPF

C

LIP-10dB-30dB

CH 3

P

ROT

VOLUME

MIN MAX

HPF

C

LIP-10dB-30dB

CH 4

POWER

P

ROT

VOLUME

MIN MAX

HPF

C

LIP-10dB -30dB

400Hz

6

5Hz

400Hz

6

5Hz

400Hz

6

5Hz

400Hz

6

5Hz

C

H 1

P

ROT

VOLUME

MIN MAX

HPF

C

LIP-10dB-30dB

C

H 2

P

ROT

VOLUME

MIN MAX

HPF

C

LIP-10dB-30dB

C

H 3

P

ROT

VOLUME

MIN MAX

HPF

C

LIP-10dB-30dB

C

H 4

POWER

PROT

VOLUME

MIN MAX

HPF

CLIP-10dB -30dB

400Hz
65Hz

400Hz
65Hz

400Hz
65Hz

400Hz
65Hz

C

H 1

PROT

VOLUME

MIN MAX

HPF

CLIP-10dB -30dB

C

H 2

PROT

VOLUME

MIN MAX

HPF

CLIP-10dB -30dB

C

H 3

PROT

VOLUME

MIN MAX

HPF

CLIP-10dB -30dB

C

H 4

POWER

PROT

VOLUME

MIN MAX

HPF

CLIP-10dB -30dB

4

00Hz
65Hz

4

00Hz
65Hz

4

00Hz
65Hz

4

00Hz
65Hz

CH 1

PROT

VOLUME

MIN MAX

HPF

CLIP-10dB -30dB

CH 2

PROT

VOLUME

MIN MAX

HPF

CLIP-10dB -30dB

CH 3

PROT

VOLUME

MIN MAX

HPF

CLIP-10dB -30dB

CH 4

POWER

PROT

VOLUME

MIN MAX

HPF

CLIP-10dB -30dB

4

00Hz
65Hz

4

00Hz
65Hz

4

00Hz
65Hz

4

00Hz
65Hz

CH 1

PROT

VOLUME

MIN MAX

HPF

CLIP-10dB -30dB

CH 2

PROT

VOLUME

MIN MAX

HPF

CLIP-10dB -30dB

CH 3

PROT

VOLUME

MIN MAX

HPF

CLIP-10dB -30dB

CH 4

POWER

PROT

VOLUME

MIN MAX

HPF

CLIP-10dB -30dB

400Hz
65Hz

400Hz
65Hz

400Hz
65Hz

400Hz
65Hz

CH 1

PROT

VOLUME

MIN MAX

HPF

CLIP-10dB -30dB

CH 2

PROT

VOLUME

MIN MAX

HPF

CLIP-10dB -30dB

CH 3

PROT

VOLUME

MIN MAX

HPF

CLIP-10dB -30dB

CH 4

POWER

PROT

VOLUME

MIN MAX

HPF

CLIP-10dB -30dB

400Hz
65Hz

400Hz
65Hz

400Hz
65Hz

400Hz
65Hz

CH 1

PROT

VOLUME

MIN MAX

HPF

CLIP-10dB -30dB

CH 2

PROT

VOLUME

MIN MAX

HPF

CLIP-10dB -30dB

CH 3

PROT

VOLUME

MIN MAX

HPF

CLIP-10dB -30dB

CH 4

POWER

PROT

VOLUME

MIN MAX

HPF

CLIP-10dB -30dB

400Hz
65Hz

400Hz
65Hz

400Hz
65Hz

400Hz
65Hz

CH 1

PROT

VOLUME

MIN MAX

HPF

CLIP-10dB -30dB

CH 2

PROT

VOLUME

MIN MAX

HPF

CLIP-10dB -30dB

CH 3

PROT

VOLUME

MIN MAX

HPF

CLIP-10dB -30dB

CH 4

5 units

5 units

Precautions

Precautions

1. Do not connect outputs of two or more channels in parallel.

2. Do not connect speakers with a smaller impedance than specified to avoid the damage of the unit.

3. Keep the input cable away from the output cable.

Installation Precautions

Installation Precautions

1. When mounting the unit in an rack, the inside of the rack must be sufficiently ventilated.

To achieve sufficient ventilation, remove panel on the rear of the rack or use Fan at the top of the rack.

2. When mounting the unit in the rack, mount a Blank Panel at the top and the bottom of the rack and above

and below every 5 units.

4

DPA-430H

Front Panel

7654

321

Front Panel

MULTI CHANNEL POWER AMPLIFIER

1. POWER SWITCH

Pressing this switch turns the unit on.
Pressing it again turns the unit off.

2. POWER LED

When the unit is powered on, the Power LED lights Green.
When the power is off, the Power LED lights Red.

3. OUTPUT LEVEL INDICATOR

The –30dB LED lights green when an output signal level exceeds about -30dB.
The –10dB LED lights green when an output signal level exceeds about -10dB.
The CLIP LED lights amber when an output signal clips (distortion occurs).
NOTE: Do not operate the unit with the CLIP LED continuously on.

Decrease the volume level to avoid signal clipping.

4. PROTECTION INDICATOR

PROT indicator lights red when the protection circuitry is activated.
When the power is turned on, the PROT indicator lights for about 2 seconds.

5. VOLUME CONTROL

Adjust the input level of each channel.
To increase the volume level, turn the volume clockwise.
The volume control range can be set both 0dB ~ -12dB and 0dB ~ minimum by changing the volume range
setting switch internally. (See page 8).

DPA-430H

5

MULTI CHANNEL POWER AMPLIFIER

6. HIGH PASS FILTER SWITCH

ressing the switch turns on the high pass filter.

P
The corner frequency (-3dB) is 65Hz when the high pass filter switch is off or 400Hz when the high pass
filter switch is on.
NOTE: When the unit is connected with horn speaker, the high pass filter must be set to ON.

If not use the high pass filter, it may damage the connected speakers, possibly resulting in fire.

7. VENTILATION

It is the air vents. Do not stuck the ventilation panel to secure enough cooling.
Inside the ventilation panel, there is a dust filter. To clean the filter, remove the front panel and clean the dust
filter.

6

DPA-430H

Rear Panel

12 34

Rear Panel

MULTI CHANNEL POWER AMPLIFIER

1. INPUT TERMINALS

Connect signal input cables to these terminals.
The input circuitry is balanced type. (+ : Hot, - : Cold, GND: Ground)

2. SPEAKER OUTPUT TERMINALS

Connect speaker cables to these terminals.
Only connect speakers with an impedance equal to or greater than those specified below.

Country Speaker Output Speaker Impedance (CH1~CH4)

Europe 100V 33.3Ω

USA /Canada 70V 16.3Ω

NOTE: Connecting speakers with a smaller impedance than specified could damage the unit.

3. FAN

It is the cooling fan vents.
When inner temperature reaches the certain level, the speed of the fan gets faster.
Please give attention not to block the vents when install the unit.

4. AC INLET

Connect the supplied power cord to this inlet.

DPA-430H

7

MULTI CHANNEL POWER AMPLIFIER

VR200

CP207

VR200

CP207

pull out

Volume Range Setting

Volume Range Setting

The volume control range can be set both 0dB ~ -12dB and 0dB ~ minimum by changing the volume range
setting internally. The factory default setting is 0dB ~ minimum.

1. Volume Range: 0dB ~ minimum (factory default)

2. Volume Range: 0dB ~ -12dB

To change the volume range from 0dB ~ minimum to 0dB ~ -12dB, pull out the connector connected to the
CP207.

8

DPA-430H

MULTI CHANNEL POWER AMPLIFIER

1

0W 10W

....

1

0W 10W

Connecting Speakers

Connecting Speakers

Before connecting speakers, disconnect the AC power cable. Note the proper connecting terminals as below.
Make sure that the total impedance is not less than the rated impedance indicated.

HIGH IMPEDANCE SPEAKER INSTALLATION

Only connect speakers with an impedance equal to or greater than those specified below.

Country Speaker Output Speaker Impedance (CH1~CH4)

Europe 100V 33.3Ω

USA /Canada 70V 16.3Ω

NOTE : 1. Connecting speakers with smaller impedance than specified could damage the unit.

2. Do NOT connect low impedance speakers such as 4Ω, 8Ω etc to these speaker terminals, it could
causes damage to the unit.

3. Do not connect outputs of two or more channels in parallel.

4. Keep the output cable away from the input cable.

DPA-430H

9

MULTI CHANNEL POWER AMPLIFIER

Applications

Applications

10

DPA-430H

Block Diagram

Block Diagram

MULTI CHANNEL POWER AMPLIFIER

DPA-430H

11

MULTI CHANNEL POWER AMPLIFIER

Specifications

Specifications

DPA-430H

Rated Output Power 300W x 4 channels
Output Voltage/Impedance 100V / 33.3Ω, 70V / 16.3Ω
T.H.D (AES17)

Prated (300W, 1kHz) Less than 0.1%

1

Prated (100W, 1kHz) Less than 0.03%

3

High Frequency Response (+1, -3dB) Over than 20kHz
Low Frequency Response

High Pass Filter Off (-3dB ±2dB) 65Hz
High Pass Filter On (-3dB ±2dB) 400Hz

Volume Control 0dB ~ minimum (default)

0dB ~ -12dB (with setting change)
S/N (20kHz LPF, A-WTD) Better than 100dB
Input Sensitivity/Impedance 1V / 10kΩ Balance
Operating Temperature -10°C ~ +40°C
Power Source 120VAC or 220–240VAC, 50/60Hz

(Differs depends on country)
Power Consumption 250W (1/8 Pmax)
Weight (Set) 9.6kg / 21.2lb
Dimensions (Set) 482(W) x 44(H) x 420(D)mm/19(W) x 1.7(H) x 16.5(D)in

* Specifications and design subject to change without notice.

12

DPA-430H

※ DIMENSIONS

482

44

4

40

420

44

MULTI CHANNEL POWER AMPLIFIER

DPA-430H

13

MULTI CHANNEL POWER AMPLIFIER

Service

Service

Procedures

Take steps to insure the problem is not related to operator error or other products within the system. 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.

Variations and Options

Variations and Options

Variations

Variations of this product exist to reflect the variations in AC power requirements throughout the world. Product
supplied through local 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.

14

DPA-430H

NOTE

MA-106

DPA-430H

15

13

NOTE

12

DPA-430H

DPA-430H

3

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 : [phone], FAX : [phone]
Home Page : http://www.inter-m.net, E-mail : [e-mail]

Inter-M Corporation

Seoul OFFICE:653-5 BANGHAK-DONG, DOBONG-KU, SEOUL, KOREA
TEL : [phone]~8, FAX : [phone]
Home Page : http://www.inter-m.com, E-mail : [e-mail]

MADE IN KOREA

June 2010 126013