The Steren AMP-200 is an audio amplifier designed for various sound system applications. It boasts a robust set of features for both professional and home use, emphasizing sound quality, control, and durability.
Function Description:
The AMP-200 is a 150W RMS (200W maximum) audio amplifier. Its primary function is to amplify audio signals from various sources and output them to speakers. It offers a comprehensive range of controls for managing audio input and output, making it suitable for diverse setups, including public address systems, background music systems, and more. The amplifier includes independent controls for four XLR-type microphone inputs, one RCA auxiliary input, bass and treble adjustments, a main volume control, a VU-meter for monitoring output levels, and a power switch. It supports speaker outputs with impedances of 4, 8, and 16 Ohms, as well as 70V and 100V line outputs, providing flexibility for different speaker configurations.
Important Technical Specifications:
- Power Input: 115V~ 60Hz 24V
- Power Output: 150 W/95W (RMS)
- Maximum Power Output: 200W
- Power Consumption: 345W 15A
- Impedance: 4, 8, 16 Ohms (low impedance outputs), 25V, 70V, 100V (high impedance outputs)
- Frequency Response: 80 - 13000 Hz
- Total Harmonic Distortion (THD): < 3%
- Dimensions: 435 x 335 x 100mm (18.1" x 13.3" x 6")
- Weight: 12.7 Kg (28 Lb)
- Nominal Consumption: 335.52 kWh/month
- Stand-by Power Consumption: Not applicable
- Inputs: 4 XLR-type microphone inputs, 1 RCA auxiliary input, auxiliary inputs (RCA for tuner, tape deck, CD players), Main-in terminal (for external signal processor).
- Outputs: Speaker terminals (4, 8, 16 Ohms, 70V, 100V), Pre-out terminal (for external amplifier or signal processor), Monitor output, Auxiliary paging input.
- Priority Terminal: Allows for priority signaling, attenuating other inputs when activated.
- DC Battery Supply: 24V DC terminals for external battery connection.
Usage Features:
The AMP-200 is designed for ease of use and versatility.
- Individual Volume Control: Each of the four microphone inputs and the auxiliary input has its own volume control, allowing for precise mixing of audio sources.
- Tone Controls: Separate bass and treble controls enable users to adjust the tonal balance of the output audio.
- Master Volume Control: A single master volume knob controls the overall output level of the amplifier.
- VU-Meter: An eight-segment LED VU-meter provides visual feedback of the output signal level, indicating normal operation, -20dB, 0dB, and potential overload conditions (OVERLOAD indicator).
- Power Indicator: A "PL" indicator lights up when the amplifier is powered on.
- Speaker Connections: The amplifier offers multiple output options for speakers, including low impedance (4, 8, 16 Ohms) and high impedance (70V, 100V) terminals, catering to various speaker types and installation requirements.
- Auxiliary Output for Paging: A dedicated terminal (1W) is available for connecting small auxiliary speakers, providing a nominal output of 1W. This output carries only the mixed audio signal from the AUX IN.
- Priority Function: A priority terminal allows for the connection of an auxiliary contact. When short-circuited, the audio signals coming from the AUX IN are attenuated, while signals from IN2, IN3, and IN4 gain priority, useful for announcements or emergency messages.
- Tel. Paging Inputs: An auxiliary signal (600Ω) can be connected for paging purposes.
- DC Battery Supply: The amplifier can be powered by an external 24V DC battery, providing a backup power source or enabling mobile use.
- Line/Mic/Phantom Switch: This switch allows selection between line input, microphone input, or phantom power for condenser microphones.
- Balanced Microphone Terminals: Dedicated terminals for balanced microphones ensure optimal signal quality.
- Auxiliary Selector Input: A switch allows selection between Auxiliary, radio, CD, and tape deck audio signals.
- Main-in Terminal: After removing a bridging strip, an external signal processor can be connected to improve the audio signal by adjusting delay times, equalization, eliminating noises, etc.
- Pre-out Terminal: This terminal outputs mixed audio signals to an external amplifier or signal processor.
- Monitor Volume Control: Adjusts the volume level of a connected device to the monitor input.
- Auxiliary Paging Input Level Control: Adjusts the volume level of a connected device to the auxiliary paging input.
- DC Switch: Powers on or off the external battery.
- AC Fuse: Protects the alternating currents supply circuit of the equipment.
Maintenance Features:
Proper installation and maintenance are crucial for the longevity and optimal performance of the AMP-200.
- Installation: The unit should be placed on a firm, flat surface or a sturdy shelf that can support its weight. Adequate ventilation is essential, with sufficient space above and below the unit. If installed in a cabinet, ensure proper air circulation. Avoid placing the unit directly on carpeted surfaces.
- Environmental Considerations: Do not place the amplifier in excessively hot or cold locations, in direct sunlight, or near heat-generating equipment. Avoid humid areas.
- Ventilation: Do not obstruct the ventilation slots or place objects directly on them. The amplifier generates heat, and its heat sinks and ventilation slots are designed to dissipate this heat. Placing other electronic equipment near these systems may affect performance.
- Packaging: The original packaging material is designed to cushion vibrations and impacts during delivery. It is recommended to save the packaging for future transport or repairs.
- Cleaning: Clean the unit with a soft, dry cloth. For stubborn dirt, use a slightly dampened cloth with soapy water, followed by a dry cloth. Avoid using benzene, thinner, alcohol, volatile cleaning agents, or abrasive cleaners, as they can damage metal parts. Do not spray insecticide near the unit.
- Moving the Unit: Before moving the amplifier, disconnect all connections to other components and from the electrical outlet.
- Power Cord Handling: Always pull the plug, not the cord, when disconnecting from an AC outlet. If the amplifier will not be used for an extended period, disconnect the plug.
- No User-Serviceable Parts: The cabinet should not be opened as there are no user-serviceable components inside. Opening the cabinet can result in electric shock, void the warranty, and damage the unit. In case of water ingress or foreign objects falling inside, immediately disconnect the unit from the AC power source and consult an authorized warranty station.
- Warranty: The Steren product is warranted against defects in workmanship and materials for one year from the date of purchase. The warranty is void if the product is damaged by accident, acts of God, mishandling, leaky batteries, unauthorized repair, or improper safe keeping.
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