Page 1
Digital Power Amplifier
DPA Series
DPA-300S / 300D / 300T / 300Q / 600S / 600D / 900S / 1200S
Page 2
Inter-M, the History of Korea PA AMPLIFIER
Inter-M has supplied commercial amplifier to domestic and overseas market for about 30 years
starting from PA-2500 amplifier in the beginning of business.
Inter-M has concentrated on developing/manufacturing commercial amplifier for a long time and
our excellent ability to develop the world-class amplifier and produce the best are highly
recognized. As a result, we supplied to JBL and YAMAHA which are the major pro-audio
enterprises in overseas in the past. Also, we have provided our amplifier to ASHLY in USA.
Currently, Inter-M has provided diverse amplifiers such as power amplifier, combi-amplifier that
sound source and mixer function are integrated for PA system in domestic and overseas market,
high efficient SR amplifier for installation market, and highly reliable SR amplifier for touring etc.
As keeping pace with the market flow which requires eco-friendly audio system, Inter-M is coming
up with new topology amplifier that energy efficiency is maximized.
Inter-M has developed various amplifier series which offer the very best sound quality because of
remarkable decrease of standby power and the highest grade of PFC. Thus, that will show new
possibility of our domestic amplifier which can be on a par with the major manufacturer.
DPA SERIES AMPLIFIER suggest new standard and direction of amplifier in domestic sound
industry to move forward.
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Why Digital Amplifier?
The main issue is ‘EFFICIENCY’!
Efficiency in amplifier is watt’s ratio to be supplied to achieve the expected output from the amplifier.
For example, a 92% efficient amplifier requires about 1300W to be supplied to achieve 1200W
output. On the other hand, 50% efficient analog amplifier requires 2400W power.
Thus, the existing analog amplifier requires more power to achieve the same amount of outputs.
Also, it will extremely generate heat because high power losses due to low efficiency.
DPA-SERIES digital amplifier is high efficient,
low heat-dissipating and eco-friendly amplifier which minimize power consumption and
generation of heat by designing as the maximum 94% high efficient SMPS power and the maximum
92% efficient Class-D amplifier.
Analog Amplifier
Power
Amp.
Trans.
100%
100% 80% 65% 50%
EFFICIENCY EFFICIENCY
Out
Put
Trans.
50%
Digital Amplifier
SMPS
100%
100% 94% 86%
Amp.
86%
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High Power
Traditional analog amplifier
240W x 4, 12Unit Size
Power consumption 1800W
300W x 4Ch 2Unit Size
Power consumption 250W
960W
1200W
VS
1/7
Power
Consumption compare to
analog amplifier
DPA-300Q
Inter-M is proud to present high power digital amplifier with rated output 1200W based on amplifier drawing technology
accumulated in Inter-M.
DPA-SERIES Amplifier has the know-how of Inter-M synthesizing high-efficient and high power SMPS power operation
technology which is core technology of digital amplifier and Class-D amplifier technology, so we could overcome the
output limitations of high impedance amplifier. Also, there are many choices by offering diverse amplifier outputs such as
360W, 600W, 900W, 1200W with 1~4 channels amplifiers.
High Efficiency
All DPA-SERIES AMPLIFIER occupies a small space for installation
compared to the existing analog amplifier by designing as 2 unit size.
And it is able to design economical system which provides
efficiency by minimizing spaces and power consumption with
low-power drawing and various channel setup.
It occupies rack spaces of 12 unit once 4 channel is composed
of the existing analog amplifier, but the space can be saved more
because only 2 unit rack spaces are needed once DPA-300Q
uses 4 channel amplifier. Also, it is very economical compared to
analog amplifier in the aspect of power consumption once only 1/7
level of power consumption is ready to be used.
high
Why must use
Inter-M
digital amplifiers?
High Performance
DPA-SERIES amplifier shows up superior and uncomparable performance to any other digital
power amplifier in domestic and overseas market.
Inter-M
DPA-600S
Rated Output 600W 600W 600W
S/N 103dB 100dB 100dB
THD 0.03% 0.3% 0.2%
Power consumption(1/8)
130W 156W 170W
We offer S/N and THD which have more excellent performance compared to the same level of
other companies’ digital amplifier. Also, it is economically feasible because it consumes lower
power.
※ S/N : The value is Signal to Noise. The more the figure is high, the more clean sound can play
※ THD : This is the abbreviation of Total Harmonics Distortion. The more the figure is low, the more
without noise.
clean sound can play without distortion.
A Company B Company
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Diverse Line up
DPA-SERIES amplifier is ready to display the total 8 kinds of diverse line up from 300W to 1200W,
from single channel(1Ch) to quad channel(4Ch) and select amps to suit the use.
·1CH : 300W / 600W / 900W / 1200W (4 Type)
·2CH : 300W + 300W / 600W + 600W (2 Type)
·3CH : 300W + 300W + 300W (1 Type)
·4CH : 300W + 300W + 300W + 300W (1 Type)
Thorough Quality Control System
The driving force to play a Korean leading sound industry for 30 years is
thorough quality control system.
DPA-SERIES Amplifier takes 31 kinds of complicated quality test to supply
stable quality of product. Then, it is possible to ship goods once the product
achieve ‘PASS’ in all test process.
High power amplifier is A MUST,
not a choice for good sound quality!!
Secured percentage of allowance for amplifier = Good sound quality
A speaker’s capacity had been fixed to the same as the
capacity of an amplifier when drawing amplifiers and
speakers in the past.
Thus, peak output is not supported well and we distortion
happens. Then, the sound quality and the articulation go
down.
These days BGM music broadcast become more important
in PA system, so the sound quality and the sound
articulation are considered as significant factors.
Better sound quality of PA system is able to be made
without distortion once the output of amplifier is supported
at least more than two times than speaker’s rating.
DPA-SERIES amplifier is high output digital amplifier
designed to fit such a high quality sound PA system.
Existing Method : When total output of speaker and amplifier
output power are the same.
Recommanded Method : When PA amplifier output is adopted at
least more than two times.
Distrotion occurs about momentary amplifier's output
Stable output within amplifier output.
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PA
(Public Adress)
DPA SRPA
(Sound Reinforcement))
SR
Specialized SMPS Operation
Small, Light and High Efficient SMPS Operation
DPA-SERIES is greater than 94% high efficient SMPS and greater than 92% high efficient amplifier and
has achieved high efficient SMPS and amplifier beyond the limitations of world top-class amplifiers.
High Power SMPS Operation beyond PA / SR Ranges
A distance between amplifiers and speakers can be long in PA system, so impedance is supposed to
be bigger by line.
But, it is unrealistic that using a thick speaker cable have cost a lot to reduce the impedance of the line.
Thus, high impedance amplifier makes the output voltage and speaker’s impedance high to keep
amplifier’s power.
Make sure that amplifier’s power should be kept enough by raising the current because the impedance
of line and speaker is low in SR system. Thus, high impedance amplifier(power amplifier) is based on
driving voltage and low impedance amplifier(SR amplifier) is based on the current drive system.
SMPS - Switch mode power supply in DPA-SERIES amplifier provides high power and high capacity.
DPA-SERIES amplifier can be used in both high impedance and low impedance system by supplying
the current to drive enough although it is connected to low impedance SR speaker.
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The relationship between the output of amplifiers and the impedance of speakers
Speaker combined impedance value of maximum output in amplifiers or the value of output voltage can be achieved
via the following numerical formula.
Combined impedance value can be achieved because maximum output voltage is fixed in PA amplifier.
P : Amp Output Power (Watt)
V : Amp Output Voltage
P = I2R = V2/R
PA Amplifier SR Amplifier
300 W (100 V)
600 W (100 V)
900 W (100 V)
1200 W (100 V)
2
/ 33 Ω (49 V)2 / 8 Ω
2
/ 16 Ω (69.3 V)2 / 8 Ω
2
/ 11 Ω (85 V)2 / 8 Ω
2
/ 8.3 Ω (98 V)2 / 8 Ω
R : Speaker Impedance (Ohm : Ω)
I : Amp Output Current (Ampere)
1200W AC/DC Power Amplifier
Rated output possible even when DC 24V
is operated.
Rated output is possible for each model even when DC 24V is
operated.
Voltage Clamp Boosting Type Converter
Technology (A patent application)
Tap inductor converter technology is usually used to achieve
high boosting ratio and high power conversion efficiency in
battery based electronic device.
This sort of technology is good for getting high boosting ratio,
but when switching element is turning off inductor and capacitor
causes resonance and then surge type of high voltage in
switching circuit. Due to those happenings, it might reduce
product life because of excessive stress given to the product.
Inter-M has reduced voltage stress and increased the durability
by acquiring 'Voltage Clamp Boosting Type Converter
Technology' which can minimize a loss and have high boosting
ratio of input and output to resolve the issue.
Page 8
DPA Series
MIN MAX
MIN MAX
MIN MAX
MIN MAX
MIN MAX
DIGITAL POWER AMPLIFIER
AC&DC Dual Power Operation
AC & DC dual Power operation. Normal power operation via AC
220~240V electrical power input. Amplifier will switch automatically
to DC 24V battery backup supply input when AC power is
interrupted.
Power On/Off Control with Dry Contact
The user can control the Power On/Off at a long distance by using
a control input.
Priority Program Override
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.
LED Display & Front Volume
It is easy to monitoring a status of amplifier with LED display
(Run, -30dB, -10dB, Clip, Priority, Fault, AC, DC).
Also, it is convenient to control a volume because of the volume of
each channel on the front side.
Page 9
1
MIN MAX
1
1
LED
2
Volume Control
3
Power Switch
Front Panel
❖
3
2
3
2
1
1
1
AC Power Input Terminal
2
AC Power Remote
3
DC Power Input/ PRIORITY
4
FAN
5
PRIORITY Input Terminal/ PRIORITY
3
3
Rear Panel
❖
4
2
4
2
6
PRIORITY Volume Control
7
Speaker Output
8
Output Voltage Tap
9
PGM Terminal
7
5
7
8
5
8
MIN MAX
MIN MAX
6
9
6
9
Page 10
APPLICATIONS
DPA Single channel PA speaker connection
❖
DPA-1200S
Performance Church Speech
SQ-15 X 2
SQ-15 x 4
DPA-1200S x 2ea
400 500 700
DPA-1200S
Columm & Ceiling speaker
DPA-1200S
CU-540(40W)
15EA
DPA-900S
CU-540(40W)
12EA
DPA-300D/600D SR speaker stereo operation
❖
DPA-600D
Mixer
SQ-8 SQ-8
SQ-8 X 2
DPA-600Dx1ea
400 600300
CU-540(40W)
8EA
CU-540(40W)
4EA
DPA-600D
DPA-300D
CU-540(40W)
8EA
CU-540(40W)
4EA
Page 11
DPA-300T SR Stereo, PA 1CH Applications
❖
SQ-8 X 2
100
Mixer
DPA-300T 2CH
200
400
SQ-8
DPA-300T
SQ-8
Columm &
Ceiling speaker
DPA-300T
CU-540(40W)
4EA
SR Applications via DPA-300Q
❖
Mixer
SQ-8
SQ-8 X 4
200
DPA-300Q 4CH
400
DPA-300Q
SQ-8 SQ-8 SQ-8
800
CU-540(40W)
4EA
CU-540(40W)
4EA
DPA-300Q
CU-540(40W)
4EA
CU-540(40W)
4EA
Page 12
SPECIFICATIONS
Single Channel
❖
DPA-300S DPA-600S DPA-900S DPA-1200S
Rated Output (T.H.D 0.1%, AES17) 300W 600W 900W 1200W
Peak Power 480W 680W 1050W 1260W
Output Voltage/Impedance Input
Input Sensitivity 1V/10kΩ
T.H.D (AES17)
Signal to Noise (20kHz LPF) 103dB
Frequency Response (1W, ±3dB) 50Hz~20kHz
Operating temperature -10℃ ~ 40℃
Operating Power AC 220-240V 50/60Hz, DC 24V
Power consumption (1/8 Power) 130W 250W
Weight (SET) 6.5kg/14.3lb 6.6kg/14.6lb 7.7kg/17lb
Dimensions (SET) 482(W) x 88(H) x 397(D)mm/19(W)x3.5(H)x15.6(D)in 482(W) x 88(H) x 450(D)mm/19(W)x3.5(H)x17.7(D)in
Dual Channel
❖
Rated Output 0.1%
1/3 Power 0.03%
100V/33.3Ω
70V/16.3Ω, 49V/8Ω
DPA-300D DPA-600D
Rated Output (T.H.D 0.1%, AES17) 300W x 2 600W x 2
Peak Power 350W / CH 680W / CH
Output Voltage/Impedance Input 100V/33.3Ω, 70V/16.3Ω, 49V/8Ω 100V/16.6Ω, 70V/8.2Ω, 69.3V/8Ω
Input Sensitivity 1V/10kΩ
T.H.D (AES17)
Signal to Noise (20kHz LPF) 103dB
Frequency Response (1W, ±3dB) 50Hz~20kHz
Operating temperature -10℃ ~ 40℃
Operating Power AC 220-240V 50/60Hz, DC 24V
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)x3.5(H)x15.6(D)in 482(W) x 88(H) x 450(D)mm/19(W) x 3.5(H) x 17.7(D)in
Rated Output 0.1%
1/3 Power 0.03%
100V/16.6Ω
70V/8.2Ω, 69.3V/8Ω
100V/11.1Ω
70V/5.4Ω, 85V/8Ω
100V/8.3Ω
70V/4.1Ω, 98V/8Ω
Triple / Quad Channel
❖
DPA-300T DPA-300Q
Rated Output (T.H.D 0.1%, AES17) 300W x 2 300W x 4
Peak Power 350W / CH 350W / CH
Output Voltage/Impedance Input 100V/33.3Ω, 70V/16.3Ω, 49V/8Ω 100V/33.3Ω, 70V/16.3Ω, 49V/8Ω
Input Sensitivity 1V/10kΩ
T.H.D (AES17)
Signal to Noise (20kHz LPF) 103dB
Frequency Response (1W, ±3dB) 50Hz~20kHz
Operating temperature -10℃ ~ 40℃
Operating Power AC 220-240V 50/60Hz, DC 24V
Power consumption (1/8 Power) 250W
Weight (SET) 6.8kg/15lb 7kg/15.5lb
Dimensions (SET) 482(W) x 88(H) x 397(D)mm/19(W) x 3.5(H) x 15.6(D)in
Rated Output 0.1%
1/3 Power 0.03%
Inter-M Corp. (IMK)
653-5 Banghak-Dong, Dobong-Gu, Seoul, Korea
Overseas Sales Team
Tel_ +82-2-2289-8141~7 Fax_ +82-2-2289-8149 E-mail_ overseas@inter-m.com www.inter-m.com
※ Design and specication are subject to be changed for the improvement of product quality without pre notice.
2013. 10
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