Table of Contents
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Table of Contents
Related Manuals for Inter-m PAM-120A
Summary of Contents for Inter-m PAM-120A
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Page 1: Operation Manual
Operation Manual Public Address Amplifier PAM-120A/340A/480A... -
Page 2: Table Of Contents
PUBLIC ADDRESS AMPLIFIER Contents Contents Welcome Warning............................1 Unpacking ............................2 Installation Environment............................2 Important Safety Instructions......................2 Features ............................3 Operation ............................3 Front Panel ............................4 Rear Panel ............................5 Connecting Speakers ........................10 Applications ..........................12 Block Diagrams ..........................14 Specifications ..........................16 Service Procedures............................17 Schematic .............................17 Parts List ............................17 Variations and Options .......................17 Warranty... -
Page 3: Warning
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. -
Page 4: Unpacking
PUBLIC ADDRESS AMPLIFIER Unpacking Although your PAM-120A or PAM-340A or PAM-480A 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. -
Page 5: Features
Optional modules can be installed in multiple configurations for convenience and ease of use. Choose the PAM-CDA (Compact Disc), PAM-T (AM/FM Tuner) or PAM-D (Cassette Deck) modules to expand the PAM-120A/340A/480A’s audio capabilities. - INDIVIDUAL INPUT GAIN CONTROLS Rear-panel gain controls for each input channel for total control of individual levels. -
Page 6: Front Panel
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. PAM-120A/340A/480A... -
Page 7: Rear Panel
PUBLIC ADDRESS AMPLIFIER Rear Panel Rear Panel (PAM-120A) 1. SPEAKER OUTPUT TERMINAL STRIP Connect up to five individual speakers to this strip. Impedances for 4Ω, 70V and 100V operation are shown below. Connect speakers whose combined impedance is equal to or higher than the rated output impedance, as shown below. - Page 8 The approximate levels for these controls are as follows: mic level (-50dB ~ -60dB) MIC ATT instrument level (-30dB ~ -50dB) line level (-20dB ~ -30dB) PAM-120A/340A/480A...
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Page 9: Rear Panel
NOTE: It is safe to connect most modern dynamic microphones or line level devices to the channel inputs when phantom power is activated. However, some older ribbon microphones may be damaged by phantom power, and certain unbalanced line level devices may malfunction or produce an audible hum when phantom power is active. PAM-120A/340A/480A... - Page 10 This input connects an external mixer or preamp with the unit’s power amp. Inserting a plug into the Amp In jack will disconnect all input signal from the unit’s internal mixer. Only signal from the external source will be heard. 13. LINK IN This line-level input connects the unit with an external mixer for expanded input channels. PAM-120A/340A/480A...
- Page 11 The approximate levels for these controls are as follows: mic level (-50dB ~ -60dB) MIC ATT instrument level (-30dB ~ -50dB) line level (-20dB ~ -30dB) PAM-120A/340A/480A...
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Page 12: Connecting Speakers
When connecting a high-impedance speaker system in parallel, you can connect speakers with a total rated input of up to 120W (PAM-120A) or 340W (PAM-340A) or 480W(PAM-480A). Total rated input of up to 120W (PAM-120A) or 340W (PAM-340A) or 480W(PAM-480A) PAM-120A/340A/480A... - Page 13 For example, if you are connecting speakers with a rated input of 15W, you can connect up to 8 speakers in parallel, as shown below: 15Wx8 units(120W(PAM-120A)) WARNING: Extreme care must be exercised when connecting low-impedance systems, as potentially hazardous voltages may be present at these terminals.
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Page 14: Applications
PUBLIC ADDRESS AMPLIFIER Applications Applications PAM-120A PAM-120A/340A/480A... - Page 15 PUBLIC ADDRESS AMPLIFIER PAM-340A/480A PAM-120A/340A/480A...
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Page 16: Block Diagrams
PUBLIC ADDRESS AMPLIFIER Block Diagrams Block Diagrams PAM-120A PAM-120A/340A/480A... - Page 17 PUBLIC ADDRESS AMPLIFIER PAM-340A/480A PAM-120A/340A/480A...
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Page 18: Specifications
Tone Control (100Hz, 10kHz) ±12dB CH1~CH6 EQ Control (100Hz, 1kHz, 10kHz) ±12dB Operation Temperature 14F~104F (-10°C~+40°C) Power Source 100–120VAC or 220V–240VAC; 50/60Hz, 24V DC(only PAM-120A) (Supplied AC mains transformer depends on country requirements) Power Consumption 135W(1/8 POWER) 260W(1/8 POWER) 360W(1/8 POWER) 200W(1/3 POWER) -
Page 19: Service
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. - Page 20 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).
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