Inter-m DPA-150Q User manual

Operation Manual
Digital Power Amplifier
DPA-150Q
* 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 mana ement 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!
RISK OF ELEC RIC SHOCK
DO NO OPEN
Caution
CAU ION: O REDUCE HE RISK OF ELEC RIC SHOCK.
DO NO REMOVE COVER (OR BACK).
NO USER-SERVICEABLE PAR S INSIDE.
REFER SERVICING O QUALIFIED SERVICE PERSONNEL.
A EN ION : RISQUE DE CHOC ELEC RIQUE ME PAS
QUVRIR
WaRninG
o prevent fire or shock hazard, do not
expose the unit to rain or moisture.
*WARNING FOR YOUR PRO EC ION PLEASE READ HE FOLLOWING-WA ER AND MOIS URE: 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.
*Do not install this equipment in a confined space such as a book case or similar unit.
* his apparatus shall not be exposed to dripping or splashing and no objects filled with liquids, such vases, shall be placed on the apparatus.
* his apparatus shall be connected to a mains socket outlet with a protective earthing connection.
*
It has heed to be easy to disconnect the device. o disconnect the device from power, separate AC input cable from inlet or unplug the AC Cord.
Caution
* hese servicing instructions are for use by qualified service personnel only. o 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
*his 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. hese limits are
designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. his 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.
his 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.
his symbol is intended to alert the user to the
presence of important operation and maintenance
(servicing) instructions in the literature accompanying
the appliance.
Caution: o 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.
Pour deconnecter completement làppareil du reseau
dàlimentation. deconnecter le cordon dàlimentation de la
prise murale.
Laprise du reseau dàlimentation doit demeurer aisement
accessible.

DIGITAL POWER AMPLIFIER
1
DPA-150Q
Contents
Contents
Unpackin .......................................................................................................................................2
Installation
Environment....................................................................................................................................2
Important Safety Instructions.............................................................................................................2
Features............................................................................................................................................3
Contents and Accessories .............................................................................................................3
Front Panel ......................................................................................................................................4
Rear Panel .......................................................................................................................................6
Applications ....................................................................................................................................9
Block Dia ram ..............................................................................................................................10
Specifications ................................................................................................................................11
Service
Procedures....................................................................................................................................13
Schematic.....................................................................................................................................13
Parts List .......................................................................................................................................13
Variations and Options ...............................................................................................................13
Warranty .......................................................................................................................................13

DIGITAL POWER AMPLIFIER
2DPA-150Q
Installation
Unpackin
Unpackin
Although your DPA-150Q 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
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
S3125A

DIGITAL POWER AMPLIFIER
3
DPA-150Q
Features
Contents and Accessories
Contents and Accessories
1. Power Cord x 1
2. 6P Terminal Block x 2
3. 2P Terminal Block (Ac Remote power) x 1
4. 8P Terminal Block x 1
5. Screw for Rack Mount x 4
6. Washer x 4
7. Operation Manual x 1
Features
- HIGH-POWER, HIGH PERFORMANCE 4 CHANNEL CLASS-D POWER AMPLIFIER
High-Power high performance Class-D Professional Amplifier has up to 600W 4CH (150W×4) power output.
- EMERGENCY POWER BACK UP (DC 24V) CAPABILITY
The unit operates on a DC 24V battery power supply for emergency back up without UPS.
- SMPS (SWITCHING MODE POWER SUPPLY) POWER SCHEME
High efficient light weight SMPS power system is utilized.
- RATED OUTPUT POWER VIA DC BACKUP SUPPLY
Output power can be maintained as AC power when DC 24V power supplied.
- POWERFUL AND DETAILED SOUND QUALITY
High S/N ratio and Low THD reproduces powerful and detailed sound.
- COMPLETE PROTECTION CIRCUITS
Complete circuit protection is activated in case of amplifier overheating output shorting overload over power
and DC output.
- OPERATION INDICATOR LED
LED display to check the operating status (AC DC STBY POWER SIG -10dB CLIP PROTECT)
- 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 Priority input
terminal. This is Ideal for Emergency message broadcasting applications.

DIGITAL POWER AMPLIFIER
4DPA-150Q
Front Panel
Front Panel
1. AC, STBY, DC LED
When Power switch is on AC or DC LED will illuminate depending on input Power source. When Power
switch is off STBY LED will turned on
※NOTE: During operation of DC amplifier is keep going to work even if the switch of power is turned off.
2. OUTPUT LEVEL INDICATOR (1CH, 2CH, 3CH, 4CH)
Indicator display of unit’s output level status.
SIG(-30dB) LED: Green -10dB LED: Green CLIP LED: Orange PROTECT LED: Red
※Note: If CLIP LED is lit sound output is distorted. Reduce the volume level.
3. VOLUME CONTROL
Volume adjustments are made. Turn clockwise to increase the volume level.
DPA
DIGITAL POWER AMPLIFIER
150Q
CH 1 CH 2 CH 3 CH 4
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-150Q
4. FAN VENTS
The air circulation passage to prevent overheating of the device please do not obstruct the flow as air flows
from front to back.
5. POWER SWITCH
Push on/off switch. When Power switch is on BLUE LED will illuminate.

DIGITAL POWER AMPLIFIER
6DPA-150Q
Rear Panel
Rear Panel
1. PRIORITY INPUT AND CONTACT CLOSURE
Each amplifier module has 2 audio inputs. The PGM input and PRIORITY input. PGM input 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. Please refer to the following picture about the suitable
cables.
2. PRIORITY VOLUME CONTROL
It is a volume control of PRIORITY INPUT signal. This control can adjust PRIORITY INPUT signal used as
emergency broadcasting. Turn clockwise to turn the signal level and counterclockwise to lower the signal
level.
※It is mainly for priority broadcasting so don’t make the VOLUME level too low.
3. PGM INPUT TERMINAL
Terminal block connector accepts the source input. Please refer to the following picture about the suitable
cables.
+ - G+ - G
+ - G+ - G
CH 3CH 4
CH 2 CH 1
CH 4 CH 3 CH 2 CH 1
PGM INPUT
CH 1
8Ω
70V
100V
OUTPUT +
-
G1234
COM
PRIORITY
SW INPUT
PRIORITY
VOLUME
+
-
DC INPUT 21V - 27V
MAX 60A
AC POWER REMOTE
CH 2
8Ω
70V
100V
CH 3
8Ω
70V
100V
CH 4
8Ω
70V
100V
MIN MAX
100V / 66.7Ω
70V / 32.7Ω
34.6V / 8Ω
AC INPUT
100
- 240V~ 50/60Hz, 140W
554876
3219
+
-
G1234
COM
PRIORITY
SW INPUT
G
INPUT
SW
}
}
COM
1
2
3
4
-
+
+ - G+ - G
CH 3CH 4
PGM INPUT
G
CH 3/CH 1
}
-
+
G
CH 4/CH 2
}
-
+

DIGITAL POWER AMPLIFIER
7
DPA-150Q
4. OUTPUT TERMINAL
Speaker Output Terminal. 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.
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.
5. OUTPUT VOLTAGE SELECTOR SWITCH
This three-position switch is used to select a output voltage (100V / 70V / 8Ω).
CH 4 CH 3 CH 2 CH 1
OUTPUT
10W 10W 10W 10W
....
10W 10W 10W 10W
....
CH 4 CH 3 CH 2 CH 1
OUTPUT
10W 10W 10W 10W
....
10W 10W 10W 10W
....
Speaker Output Speaker Impedance
100V / 66.7Ω
150W × 4 70V / 32.7Ω
34.6V / 8Ω
- When connecting speakers to CH 1 CH 2.
- When connecting speakers to CH 3 CH 4.

DIGITAL POWER AMPLIFIER
8DPA-150Q
6. AC INLET
Connect the power cable which is supplied with the unit. Do not bend pull twist heat and cut by force. It
may cause electric shock.
7. DC TERMINAL
This is emergency DC terminal (DC 24V). When something happens to AC power DC power automatically
operates. Input provides power to the device regardless of power switch.
※Please check voltage and + - polarity.
8. AC POWER REMOTE TERMINAL
This terminal allows the amplifier to be turned on or off from a distance or other device.
9. FAN VENTS
Air flow is front to back.
※Caution: DO NOT block front or rear air vents.

DIGITAL POWER AMPLIFIER
9
DPA-150Q
Applications
Applications
+ - G+ - G
+ - G+ - G
CH 3 CH 4
CH 2 CH 1
CH 4 CH 3 CH 2 CH 1
PGM INPUT
CH 1
8Ω
70V
100V
OUTPUT +
-
G
1234
COM
PRIORITY
SWINPUT
PRIORITY
VOLUME
+ -
DC INPUT 21V - 27V
MAX 60A
AC POWER REMOTE
CH 2
8Ω
70V
100V
CH 3
8Ω
70V
100V
CH 4
8Ω
70V
100V
MIN MAX
100V / 66.7Ω
70V / 32.7Ω
34.6V / 8Ω
AC INPUT
100
- 240V~ 50/60Hz, 140W
SPEAKER
CD PLAYER
STEREO TUNER
CASSETTE DECK
DPA-150Q

DIGITAL POWER AMPLIFIER
10 DPA-150Q
Block Dia ram
Block Dia ram
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DIGITAL POWER AMPLIFIER
11
DPA-150Q
Specifications
Specifications
DPA-150Q
Rated Output Power 150W × 4
Peak Power 180W/CH
Output Level/Impedance
100V/66.7Ω
70V/32.7Ω
34.6V/8Ω
Input Sensitivity 1V/10kΩ
THD (ASE17 1/8 Power) Less than 0.2%
S/N (20kHz LPF) Better than 100dB
Frequency Response (1W ±3dB) 50Hz~20kHz
Operating Temperature -10°C ~ 40°C
Power Source AC 100-240V 50/60Hz DC 24V
Power Consumption 140W
Weight (Set) 6.82kg/15.04lb
Dimensions (Set) 482(W) × 88(H) × 367(D)mm/18.98(W) x 3.46(H) x 14.45(D)in
* Design and specification are subject to be changed for the improvement of product quality without pre notice.

DIGITAL POWER AMPLIFIER
12 DPA-150Q
※ DIMENSIONS
34367
440
482
88

DIGITAL POWER AMPLIFIER
13
DPA-150Q
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.

MaDE in KoREa
December 2015 138
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 : [email protected]
Inter-M Corporation
719 DOBONG-RO DOBONG-GU SEOUL KOREA
TEL : [phone]~8 FAX : [phone]
Home Page : http://www.inter-m.com E-mail : [email protected]