Power Amplifiers (PA-5125/5250/5375/5500)
Features
- 125W/250w/375w/500w/ 70V or 100V or 25V/4 Ohm power amplifier (PA-5125/PA-5250/PA-5375/PA-5500)
- Thermal protection by muting input signal (typically 85 deg at heat sink)
- Momentary short circuit protection
- Dual speed auto cooling fan
- Manual reset circuit breaker for AC mains and DC input
- Balanced input signal with gain control and selectable grounding option
- AC or DC operation for uninterrupted operation during power failure
Description
The PA-5500, PA-5375, PA-5250 and PA 5125 are reliable, heavy-duty single-channel power amplifiers designed for demanding sound system applications. All models feature an XLR balanced input, with adjustable input sensitivity from -40 to 0dB. A parallel male XLR connector enables convenient amplifier linking in multiple amplifier installations. Automatic thermal protection circuitry is provided and an "idling" circuit protects against thermal runaway. A two-speed fan helps ensure reliability, switching to high-speed when the amplifier is under heavy load. Front panel LEDs indicate output levels of -40dB, -10dB and clipping, as well as protection circuit activation. A ground-lift switch is provided to isolate signal ground from chassis ground. The outputs are 4 Ω, 70V, or 100V. The units can be powered by 220 - 240VAC or 24VDC, enabling the unit to be used as part of a portable PA system, or connection to a standby power supply for emergency operation. All models are packed in a 3.5" high (2 RU) rack-mount enclosure.
Technical Specification
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