Inter-m H-3200 User manual

H-3200/4200 Professional Power Amplifier
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B370031OC03OC03
0210

Contents
Contents
Welcome
Warning.........................................................................................................................................1
Unpacking......................................................................................................................................2
Short Form Instructions.....................................................................................................................2
Installation
Environment....................................................................................................................................3
Important Safety Instructions.............................................................................................................3
Description.......................................................................................................................................4
Features............................................................................................................................................4
Accessories.....................................................................................................................................4
Front Panel ......................................................................................................................................5
Rear Panel .......................................................................................................................................7
Connections.....................................................................................................................................9
Applications ..................................................................................................................................10
Block Diagram ..............................................................................................................................13
Specifications ................................................................................................................................14
Service
Procedures....................................................................................................................................16
Schematic.....................................................................................................................................16
Parts List .......................................................................................................................................16
Variations and Options ...............................................................................................................16
Warranty .......................................................................................................................................16

1
H-3200/4200
PROFESSIONAL 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!
Warning
RISK OF ELECTRIC SHOCK
DO NOT OPEN
CAUTION
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.
WARNING
To prevent fire or shock hazard, do not
expose the unit to rain or moisture.
*Do not install this equipment in a confined space such as a book case or similar unit.
*The apparatus shall not be exposed to dripping or splashing and no objects filled with liquids, such vases, shall be placed on the apparatus.
This symbol is intended to alert the user to the
presence of uninsulated “dangerous voltage” within
the product’s enclosure that may be of suf-ficient
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 mainte-nance
(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 expo-sure.
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.

2H-3200/4200
PROFESSIONAL POWER AMPLIFIER
Unpacking
Please take a few minutes to read this manual to familiarize yourself with important information regarding
installation, product features, and operation.
As with most electronic devices, ORIGINAL PACKAGING (OR EQUAL) IS REQUIRED in the unlikely event that
the product needs to be returned for servicing.
Short Form Instructions
1. Do not connect the AC power until step 6. The POWER switch should be in the OFF position.
2. Adjust both of the LEVEL controls to the fully attenuated position (counter clockwise).
3. Connect an appropriate line level input signal to either the balanced XLR or the balanced 1/4” TRS (Tip-Ring-
Sleeve) connector marked INPUTS.
4. Move the MODE selector to the desired position. The Stereo position is the most common.
5. Connect the OUTPUTS to the speaker load according to the mode of operation determined in the previous
step.
6. With the power switch in the OFF position, install the appropriate AC mains plug for your application then
connect to an appropriate AC source.
7. Depress the power switch to the ON position. The power switch will illuminate.
8. The product is ready for operation. Slowly increase the LEVEL control to the desired operating level. Avoid
illuminating the PEAK indicator and do not apply too much power to the speakers.
9. Operate the product and the system in a manner which DOES NOT illuminate the PEAK warning indicator.

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H-3200/4200
PROFESSIONAL POWER AMPLIFIER
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.
Safety
1. Read these instructions.
2. Follow all instructions.
3. Keep all warnings.
4. Do not use this apparatus near water.
5. Clean only with a damp cloth.
6. Do not block any of the ventilation openings.
7. 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 is provided for your safety. When 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. Use only the attachments/accessories specified by the manufacturer.
12. Use only with a 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

4H-3200/4200
PROFESSIONAL POWER AMPLIFIER
Description
Description
- H-3200
A 3U rack space, 2 channel amplifier capable of 3200W into 4Ωload (bridged mono).
- H-4200
A 3U rack space, 2 channel amplifier capable of 4200W into 4Ωload (bridged mono).
Features
Features
- 2Ωstable per channel, 4Ωstable in bridge mono
- 3U rack space
- Selectable High Pass Filter on each channel
- Clip limiter circuitry
- Forced air cooled (front panel intake, rear panel exhaust)
- Front panel indicators of operating mode
- Front panel indicators for signal strength, clip, protect, and power
- Rack Ears for permanent installation in a standard 19” (rack mount width) enclosure.
Accessories
No accessories are provided for use with this product.

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H-3200/4200
PROFESSIONAL POWER AMPLIFIER
Front Panel
Front Panel
1. HANDLES
These are provided for easy transportation and installation into equipment enclosures or racks.
2. POWER INDICATOR
This confirms the amplifier is switched ON and receiving AC MAINS POWER when illuminated.
3. LEVEL INDICATOR
This LED confirms the level of the input signal is greater than -40dB. This should be illuminated on each
channel during normal operation.
4. CLIP LIMITER INDICATOR
This LED warns of a problem in the system when illuminated. Reduce the LEVEL of the device which supplies
signal to the amplifier or reduce the LEVEL control(s) on the amplifier. This should not be illuminated during
normal operation.
5. PROTECTION INDICATOR
This LED warns of a problem in the system when illuminated. Reduce the volume and look for what has
caused the LED to illuminate (e.g. check if the temperature of the amplifier is too hot, or the speaker load
impedance is too low). This should not be illuminated during normal operation.
6. LEVEL CONTROLS
These controls adjust the input signal level for each channel. In stereo or parallel mode the controls will adjust
the signal level independently for each channel. In the bridge mono mode channel 2 will be turned fully
clockwise and channel 1 will be turned clockwise only as needed to achieve the desired level.
12345
76
ON
OFF

6H-3200/4200
PROFESSIONAL POWER AMPLIFIER
7. POWER SWITCH/CIRCUIT BREAKER
The position of this switch selects whether the AC MAINS power is ON or OFF. The power-on status is
confirmed by the illumination of the power indicator. Amplifiers should always the last item in a system to be
turned on, to avoid damage to the attached loudspeakers that may be caused by the 󴞳hump” noise caused
by switching on other system components. It is wise to reduce the level controls before applying AC power.
The circuit breaker protects the amplifier by switching OFF the AC MAINS power if the amplifier operates
abnormally due to overload or malfunction. Switch ON to reset.

Rear Panel
Rear Panel
1. AC MAINS INPUT
Connect the amplifier to an appropriate AC MAINS power source using the supplied AC MAINS Power
Cord. It is the responsibility of the user to supply/install the appropriate AC MAINS plug, and then to
connect the amplifier to an AC MAINS power source that is rated appropriately for the current required by
the amplifier.
2. OUTPUT CONNECTORS
Binding Posts and Speakon connectors are provided for connection to the cables for the loudspeakers. Please
note that Bridged Mono operation requires a different method of interconnection to the speaker cables than
normal Stereo operation. Also be sure that the amplifier is in the correct mode before connecting the speaker
load.
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H-3200/4200
PROFESSIONAL POWER AMPLIFIER
CH2
CH1 1- 1+
2+ 2-
AMP OUTPUT CH1/CH2
NOT CONNECTED
NEG POS
1- 1+
2+ 2-
MONO(BTL)
CH1 AMP OUTPUT SPEAKON
- STEREO MODE - BRIDGED MODE

8H-3200/4200
PROFESSIONAL POWER AMPLIFIER
3. CLIP LIMITER SWITCH
The CLIP LIMITER reduces the signal level as necessary to insure that excessive signals do not overdrive the
amplifier. It is recommended to leave this switched to the “ON” position to help prevent distortion and to help
provide protection to high frequency drivers.
4. HIGH PASS FILTER SWITCH
Select the filter position that is appropriate for your application. The OFF position allows full frequency range
signals be amplified. The 30Hz/50Hz positions of this switch filter (reduce the signal strength) signals below
30/50 Hz to reduce AC MAINS power requirements and also to help protect the speaker by reducing the
level of subsonic signals.
5. BALANCED INPUT CONNECTORS
Each input channel is equipped with a special “combo” connector that will accept either a 1/4” TRS or an
XLR connector. Although the connector is of this special design, standard rules of interconnect apply.
6. MODE SELECTOR SWITCH
Select the appropriate position of this switch for STEREO, PARALLEL or BRIDGED MONO as required.
The Stereo mode is the standard mode of operation. Channel 1 input sends signals to the channel 1 output.
The channel 2 input sends signals to the channel 2 output.
The Parallel mode uses the channel 1 input to sends signals to both the channel 1 and channel 2 outputs. No
input should be supplied to channel 2 when in Parallel mode.
The Bridge Mono mode combines both amplifier channels to create a mono amplifier. Input signal applied to
channel 1 will be available across the positive terminals of Channel 1 and channel 2. Do not connect a signal
to the channel 2 input. Do not connect speaker cables to the negative outputs.
7. INPUT SENSITIVITY SWITCH
The input sensitivity may be reduced by either -6dB or -12dB as needed to reduce the possibility of excessive
input signal levels overdriving the amplifier.
PUSH
12
3
12
3
GROUND GROUND
GROUND
HOT HOT
HOT
COLD COLD
COLD
XLR MALE COMBINATION
- XLR-TYPE - PHONE JACK

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H-3200/4200
PROFESSIONAL POWER AMPLIFIER
Connections
Connections
Inter-M products are wired to reflect accepted wiring practices used throughout the world.
Balanced XLR connectors are wired as described:
Pin #1 Shield
Pin #2 Positive/Hot
Pin #3 Common/Cold
Balanced 1/4” TRS connectors are wired as described:
Tip is Positive/Hot
Ring is Common/Cold
Sleeve is Shield
Insert Points
Line Input
Headphones
Unbalanced
Input/Output
AUX Send
Ring
Ring
Tip
Tip Sleeve
Sleeve
Send
Return
Screen
Hot (positive)
Cold (negative)
Screen
Left Signal
Right Signal
Ground
Signal
Ground
3 Pole (Stereo) Jack
2 Pole (Mono) Jack
Ring TipSleeve
TipSeeve
2
1
3
Balanced Input
Hot (positive)
Hot (positive)
Sleeve
Screen
Cold (negative)
Cold (negative)

10 H-3200/4200
PROFESSIONAL POWER AMPLIFIER
Applications
Applications-1
- Parallel/Stereo Installation
CH1
CH2
CH1/CH2 AMP OUT
(1+ 1–)
- Binding Post Outputs
- 2 Channels & 2 Speakon™Outputs
- 2 Channels & 1-Speakon™Outputs
CH2
CH1
CH2 AMP OUT
CH1 AMP OUT
CH1 AMP OUT
(1+ 1–)
CH2 AMP OUT
(2+ 2–)
CH2 SPEAKON: NOT CONNECTED

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H-3200/4200
PROFESSIONAL POWER AMPLIFIER
Applications
Applications-2
- Bridge Mono Installation
- Binding post outputs
- Speakon™Outputs
BRIDGED
MONO
BRIDGED OUTPUT
(1+ 2+)
CH2 SPEAKON: NOT CONNECTED
NOT CONNECTED
NOT CONNECTED

12 H-3200/4200
PROFESSIONAL POWER AMPLIFIER
Applications
Applications-3
- Linked Installation: Linking works with Stereo/Parallel or Bridged Mono Operation
AUDIO MIXER
CASSETTE DECK
MIC
GUITAR
SPEAKERSPEAKER
ON
R
L

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H-3200/4200
PROFESSIONAL POWER AMPLIFIER
Block Diagram
Block Diagram

14 H-3200/4200
PROFESSIONAL POWER AMPLIFIER
Specifications
Specifications
- ELECTRICAL
- GENERAL
H-3200 H-4200
Power Source 100–120VAC or 220–240VAC; 50/60Hz
(Supplied AC mains transformer depends on country requirements)
Weight 32kg/70.5lb 35kg/77.2lb
Dimensions 482(W)×132(H)×475(D)mm/19(W)×5.2(H)×18.7(D)in
Power Output Level
STEREO 1kHz both channels driven
R
L =8Ω@ 0.1% THD 800W 1000W
R
L =4Ω@ 0.1% THD 1200W 1600W
R
L =2Ω@ 0.1% THD (1ch driven) 1600W 2100W
BRIDGED R
L =8Ω1kHz @ 0.1% THD 2400W 3000W
R
L =4Ω1kHz @ 0.5% THD 3200W 4200W
Frequency Response R L =8Ω, P=1W 20Hz~20kHz: ±0/1dB, 5Hz~70kHz: -3dB
Total Harmonic Distortion(THD+N)
f=20Hz~20kHz, 1/10 Power
STEREO R
L =8Ω&4Ω≤0.03%
BRIDGED R
L =8Ω≤0.03%
Channel Separation Half Power R L =8Ω,≥80dB
f=1kHz, ATT. max. Input 600Ωshunt
Residual Noise (DIN Audio Filter) ≤-85dB: ATT min.
Signal-to-Noise Ratio (DIN Audio Filter) ≥107dB
Input 600ΩShunt
Standard Input Sensitivity 1V 1V
(Rated Power into 4Ω1kHz)
Damping Factor R
L =8Ω, f=1kHz ≥450
Voltage Gain (ATT max.) 4Ω1kHz 69dB 78dB
Output Circuitry H-Class H-Class
Input Impedance (ATT max.) ≥20kΩ(Balanced/Unbalanced)
Indicators Active, Clip/Limiter, Signal, Protection
Protection Power SW ON/OFF muting, Full short circuit
Thermal, RF, Ultrasonic
Fan Circuit Low-Speed-Variable-Hi-Speed
Connectors Input: balanced combination connector (XLR type+1/4” TRS)
Output 5-Way binding posts×2, Speakon
TM
Terminal×2

15
H-3200/4200
PROFESSIONAL POWER AMPLIFIER
* Specifications and design subject to change without notice.
Current LOAD Typical 1/3 Power Full Power
(1/8 Power)
8ohm 5.2A 9.3A 21A
120V 4ohm 8.4A 15.4A 37.6A
H-3200 2ohm 9.2A 24A 55.6A
8ohm 2.2A 5.7A 12.6A
230V 4ohm 4.3A 9.3A 21.2A
2ohm 5.7A 14.2A 32.4A
8ohm 6A 11.8A 26.8A
120V 4ohm 8.6A 19.6A 47.2A
H-4200 2ohm 12.6A 31.6A 80.8A
8ohm 3.1A 7A 15.8A
230V 4ohm 4.6A 11.4A 26.2A
2ohm 7A 17.8A 40.4A

16 H-3200/4200
PROFESSIONAL POWER AMPLIFIER
Service
Service
Procedures
Ensure the problem is not related to operator error, or system devices that are external to this unit. 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(in Korea or the
USA) or the authorized Inter-M Distributor for your specific country or region.

MADE IN KOREA
May 2004 9007301010
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.
1 EAST BEACON LIGHT LANE CHESTER, PA USA 19013-4409
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-KU, SEOUL, KOREA
TEL : [phone]~8, FAX : [phone]
Home Page : http://www.inter-m.com, E-mail : [email protected]