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P-2000
Operating Manua
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Operating Manual
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SERVICE MANUAL
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Service Manual
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Inter-m P-2000, P-3200 Operating Manual

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P-2000/P-3200
Power Amplifier
Copyright 2004 Inter-M Corporation
P-2000/P-3200 Power Amplifier
Contents
Unpacking ............................................................................................................................... 3
Warnings .................................................................................................................................. 3
Operation................................................................................................................................. 5
Power Amplifier ....................................................................................................................... 6
Front Panel Controls.................................................................................................................... 7
Operational Modes .................................................................................................................. 11
Speaker Impedance and Connections.............................................................................. 11
Speaker Connection Procedures............................................................................................ 12
Speaker Cable ...................................................................................................................... 13
Maintaining Proper Polarity .................................................................................................. 13
Rack Mounting Your Amplifier ............................................................................................. 13
Specifications............................................................................................................................ 15
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P-2000/P-3200 Power Amplifier
Welcome
A personal welcome to you from the management and employees of Inter-M
Thank you for purchasing this fine Inter-M product. All of us here at Inter-M are dedicated to providing you with the highest quality products and the best value.
We sincerely trust this product will provide you with 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 a part of our worldwide extended family!
Unpacking
Although your P-2000/P-3200 Power Amplifier 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.
Warnings
Environment
Never place this product in an environment that could alter its performance or reduce its service life. Such environments are usually characterized by high levels of heat, dust, moisture, or vibration.
Safety
1. Read these instructions carefully.
2. Follow all instructions.
3. Keep all warnings.
4. Do not operate this apparatus near water.
5. Clean only with a damp cloth.
6. Do not block any of the ventilation openings.
7. Install only in accordance with the instructions in this manual.
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P-2000/P-3200 Power Amplifier
8. Do not install near any heat sources such as radiators, heat registers, stoves, or other devices (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. 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 it is attached to the apparatus.
11. Use only the attachments/accessories specified.
12. Use only with a cart, stand, tripod, bracket, or table specified, or sold with the apparatus. When a cart is used, use caution when moving the cart/apparatus combination to avoid overturning.
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.
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P-2000/P-3200 Power Amplifier
Operation
Make certain that speakers and input sources are properly connected before switching on.
Keep volume levels at minimum gain before switching on.
NOTE: The system’s operation is delayed by approximately three seconds after pressing the AC Mains power switch. This is due to the built-in protection circuitry, designed to protect speakers and other system components.
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P-2000/P-3200 Power Amplifier
P-2000/P-3200 Power Amplifier
Features
Dual Power Supply
• Individual power supplies for Left and Right channels for true dependability.
Advanced Protection Circuitry
• Thermal and current overload protection, short and open circuit protection, ultrasonic and RF protection circuitry for component and loudspeaker protection.
Ultra-Efficient Cooling System
• Temperature-sensing variable speed fan for reliable thermal control to prevent overheating.
Bridged Mono and Input Parallel Operation
• Bridged mono and input parallel modes for increased power and versatility.
Versatile Connectivity
• Balanced inputs on hybrid XLR/TRS connectors, as well as speaker connect and five­way binding post output connectors to accommodate a wide array of system options.
Slim Design, Compact Size
• Streamlined design fits in a compact 3RU space.
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P-2000/P-3200 Power Amplifier
Front Panel Controls
1. Power Switch
Pushing this switch up switches the unit on. Pushing it down switches the unit off.
2. Power Indicator LED
When the unit is powered on, the Power LED will glow steadily.
3. Input Attenuators
These are detented controls for regulating each channel’s input level. Clockwise rotation increases gain.
4. Output Level Indicators
These LEDs indicate the amplifier’s output status, lighting when audio signal reaches –30dB and –15dB.
5. Clip Indicators
The red CLIP LED indicates an excessive output level, lighting when distortion reaches approximately 1%. Do not operate the unit with the CLIP LED steadily on (illuminated).
6. Protection Indicator
This LED indicates the state of the amplifier’s protection circuitry. When the Protection LED is on (illuminated), the protection circuitry is active, indicating that the unit is not operating normally. This is typically due to overheating or power limiting. Please check the Input and Output condition of the amplifier. (Note that the Protection Indicator lights for approximately six seconds when the amplifier is first powered on.)
The amplifier offers the following modes of protection:
Thermal Protection: Activates when internal operating temperature exceeds 100˚ Celsius.
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P-2000/P-3200 Power Amplifier
Full Short Protection: Full output current peak of up to 25 amperes (50 amperes at 120VAC) is permitted, but if the output is shorted the current is reduced to approximately 25% of normal output.
Compressor/Limiting: When maximum output power is reached, output level will be reduced to avoid distortion.
RF Protection: Maximum available power is reduced above 15kHz without affecting frequency response at normal signal levels, to protect high-frequency drivers from high-frequency oscillation burnout.
DC Fault Protection: DC detection circuitry shuts the speaker output when a DC fault voltage of ±3dB or greater is detected.
Power On/Off Muting: Audio to speakers is delayed for several seconds on powering on and off to reduce potential speaker damage from transients.
Active Inrush Current Protection: Inrush current is limited by a NTC (Negative Temperature Coefficient) resistor which is engaged when inrush resistance is detected and then diminished gradually to avoid loss of power.
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P-2000/P-3200 Power Amplifier
Rear Panel Controls
1. AC Input
Connect this cable to a standard AC outlet.
2. Input and Link Output Connectors
Balanced input connectors are provided on hybrid XLR/TRS jacks. Link output connectors are provided on three-pin XLR connectors, and are used to operate multiple amplifiers in parallel mode. (When operating in bridged mono mode, only channel one input is active.)
Wiring for the input and link connectors is shown below:
3. Speaker Output Terminals
These five-way binding posts and speaker connect jacks are used to connect speakers to the unit.
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P-2000/P-3200 Power Amplifier
Speakers may be connected in Stereo or Bridged Mono mode. Please refer to the illustrations below.
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P-2000/P-3200 Power Amplifier
Operational Modes
Stereo Mode
In Stereo mode, channels A and B operate independently, with each channel feeding its own amplifier circuit. In this mode, minimum speaker impedance per channel is 4.
Bridged Mono Mode
In Bridged Mono mode, both amplifier channels are bridged together and function as a single-channel amplifier. Only the Left channel input is active, and only the Left channel Input Attenuator controls the amp’s output. In this mode, minimum speaker impedance per channel is 8.
Parallel Mode
In Parallel mode, channels A and B operate independently, but are connected in parallel with another amplifier’s A and B channels.
Speaker Impedance and Connections
The minimum speaker impedance is wholly dependent on the operational mode of the amplifier. It is critical that the minimum impedance not equal less than the recommended impedance.
The illustration below shows examples of speaker connection in stereo and bridged mono modes.
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P-2000/P-3200 Power Amplifier
Speaker Connection Procedures
Always switch the power off before connecting speakers.
After removing approximately 10mm (1/4 inch) of insulation from the ends of the speaker cables, twist the strands tightly and pass the bare ends through the holes in the terminals, tightening the terminals to secure the wires.
Make certain the wires do not protrude from the terminals and touch the amplifier’s chassis, or an adjacent terminal.
The P-2000/3200 is capable of very high output levels. Be certain to use a speaker system that can accept high input levels. If the input capacity of your speaker system is less than the amplifier’s rated output, you may protect your speakers by connecting a fuse between amplifier and speaker, as shown below:
Use the following formula to determine the needed fuse rating:
P0 (W) = Speaker’s input capacity (RMS) R () = Speaker’s nominal impedance I = Required fuse rating.
For example: if the speaker’s input capacity is 100W, with 8 impedance,
The required fuse rating is 3.5A.
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P-2000/P-3200 Power Amplifier
Speaker Cable
Always use the heaviest-duty (lowest gauge) speaker cable available. The terminals can accommodate very thick speaker cable.
Maintaining Proper Polarity
It is very important to wire your speaker connectors consistently at each end of each cable, in order to maintain proper polarity. All quality cables are manufactured with clear markings to identify the different conductors – normally by color-coding, printed markings, or textured ribbing on the cable’s jacket material. Always make certain to correctly wire your connections so that tip is connected to tip, and sleeve to sleeve. Failing to do so will cause your speakers to operate out of phase, resulting in significantly reduced low-frequency output from your system.
Rack Mounting Your Amplifier
The amplifier intakes cool air through the front panel and exhausts warm air through the rear panel. When mounting in a portable equipment rack, maintain adequate ventilation by making certain the front and rear panels are not obstructed.
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P-2000/P-3200 Power Amplifier
Block Diagram
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P-2000/P-3200 Power Amplifier
Specifications
Rated Output (RMS)
P-3200 P-2000 Stereo 8Ω (per channel) 750W 500W Stereo 4Ω (per channel) 1200W 750W Stereo 2Ω (per channel) 1400W 1000W Bridged Mono 8Ω 2400W 1500W Bridged Mono 4Ω 2800W 2000W
Frequency Response ( ± 0.5dB) 12Hz-35kHz
Input Sensitivity 1Vrms
T.H.D 0.1%
S/N -100dB
Damping Factor better than 200
Output Circuit P-3200 3-step high efficiency circuit P-2000 2-step high efficiency circuit
GENERAL
Power Source AC 110V-240V, 50/60Hz,
Power Consumption P-3200 1100W P-2000 800W
Weight P-3200 25kg/55lb P-2000 24.5kg/54lb
Dimensions 482(W) x 132(H) x 280(D) mm
19(W) x 5.2(H) x 11(D) in.
Specifications and design subject to change without notice for improvements.
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P-2000/P-3200 Power Amplifier
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: (610) 874-8870, FAX: (610) 874-8890 Home Page:http://www.inter-m.net, E-mail: service@inter-m.net
INTER-M Corporation
SEOUL OFFICE: 653-5 BANGHAK-DONG, DOBONG-KU, SEOUL, KOREA TEL: 82-2-2289-8140~8, FAX: 82-2-2289-8149 Home Page:http://www.inter-m.com, E-mail: export@inter-m.com
0704P20003200 PRINTED IN KOREA
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