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RDL HD-PA35UA HD Series 35 Watt Power Amplifier (25/70/100 Volt)

 
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    RDL-HDPA35UA
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Description

The HD-PA35UA is a single input audio amplifier for systems demanding the highest energy efficiency. It may be used as a single zone amplifier fed from a variety of RDL or OEM mixers. It is ideal for providing one or more additional zones to a mix originating from another RDL HD series mixer ampl... Read More

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Description

The HD-PA35UA is a single input audio amplifier for systems demanding the highest energy efficiency. It may be used as a single zone amplifier fed from a variety of RDL or OEM mixers. It is ideal for providing one or more additional zones to a mix originating from another RDL HD series mixer amplifier. The 35 watt power amplifier output is driven from a high-efficiency Class D amplifier stage. The amplifier normally shuts down (standby “sleep” mode) when audio is absent and automatically turns on when needed. The amplifier output level may be VCA controlled using various optional RDL remote controls, or by industry standard 0 to 10 Vdc or 0 to 10k ohm controls. The amplifier provides a constant voltage output (25 V, 70 V or 100 V).

Features:

  • One input with front-panel volume control
  • Bass and Treble tone controls
  • Designed as a single zone amplifier
  • Master volume VCA controlled with remote adjustment capability
  • Amplifier output on detachable terminal block
  • Unbalanced summing inputs on RCA jacks
  • Includes power supply
  • Automatic sleep mode meets strictest energy saving standards

The HD-PA35UA is engineered, tested and manufactured in the U.S.A. to strict energy conservation standards. The unit consumes less than 1 watt of mains power in standby mode, and meets power amplifier efficiency specifications with an analog-filtered Class-D digital output stage. The HD-PA35UA provides a front-panel control to set the input gain. An optional remote control connected to the rear-panel RJ45 jack provides for remote adjustment of the output level. The tone controls adjust the equalization at the amplifier output.The presence of a signal at the input causes the HD-PA35UA to fully turn on, activating the power amplifier and all associated equalization and compressor circuitry. When an input signal is absent, a delay timer is initiated. Rear-panel DIP switches are provided to set the power-down delay timer to a value between 10 minutes and 2 hours in 10 minute increments. After the time-out period, the HD-PA35UA enters the sleep mode until an input signal is received. The switches may be set to disable the sleep mode for systems specifying continuous amplifier operation.

The amplifier includes an analog compressor/limiter for audio fidelity noticeably superior to conventional class D amplifiers with digital limiting. Increasing the input gain can substantially increase the average output power beyond that of a standard 35 watt amplifier. A red front-panel LED flashes when the compressor is preventing output clipping. Normal audio level signals remain unaffected by the compressor thereby preserving audio dynamics. The audio is compressed according to three dynamic time constants providing aural transparency while maintaining clean, unclipped amplified audio for input overloads of up to 20 dB. The HD-PA35UA, with compression, is capable of producing average audio output levels and clarity normally expected from amplifiers with a much higher output power rating.

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Product Specs

Rated Power:35 W RMS
Audio Input:Unbalanced stereo summing input on RCA jacks
Maximum Input Level:+ 5 dBV (+11 dBV, one input); (for 1% THD+N at output)
Input level:-15 dBV (180 mV), (to cross compressor threshold equaling 23 W amplified output, both input jacks driven)
Noise:<-75 dB (max gain)
THD+N:< 0.5% (1 kHz at compressor threshold)
Compressor:Threshold 2 dB below rated output, automatically adjusting attack and release times
Frequency Response:± 3 dB (50 Hz to 18 kHz)
Tone Controls:±10 dB @ 10 kHz, ±9 dB @ 100 Hz (front-panel) with center detent
Power Amplifier Output:35 W RMS (25, 70 or 100 V); <1% THD+N
Indicators (3):Front-panel: Signal present (green), Compressor activity (red), Power (bright=on, dim=standby, blue)
VCA:Output level, 0 to 10 Vdc control, RJ45 (compatible with RDL VCA wall controls)
Front-panel controls (4):Input, EQ (2, bass and treble), Power (momentary pushbutton, toggle on/standby)
Rear-panel controls (4):Sleep (standby) mode delay (4 binary switches)
Efficiency Standard Used:“Energy Star® Program Requirements for Audio/Video” Version 2.0
Sleep Mode Power Consumption:< 1 W (amplifier and included power supply)
Sleep Mode Delay:10 minutes to 2 hours (switch-selectable in 10 minute increments)
Sleep Mode Disable:Selectable
Active Mode Delay:2 seconds (nominal) after input audio detected
Audio Detector Threshold:-42 dBV
Ambient Operating Environment:0° C to 50° C Maximum; 20° C Recommended
Power Supply (included):100 to 240 Vac, 50-60 Hz, 50 W; 24 Vdc output to amplifier chassis
Dimensions and Weight:Height: 3.5 in.(8.89 cm); Width: 8.5 in.(21.6 cm); Depth: 10 in.(25.4 cm); Weight: 7.3 lb. (3.3 kg)

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