RDL HD-PA35U 35W Single Input Power Amplifier

RDL HD-PA35U 35W Single Input Power Amplifier

RDL HD-PA35U 35W Single Input Power Amplifier

B&H # RDHDPA35U MFR # HD-PA35U
RDL HD-PA35U 35W Single Input Power Amplifier

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  • 1Description

The HD-PA35U 35W Single Input Power Amplifier from RDL provides a constant voltage output of 25V, 70V, or 100V, and is suitable for systems demanding high energy efficiency. It can be used as a single-zone amplifier fed from a variety of RDL or OEM mixers and is also suitable for providing one or more additional zones to a mix originating from another RDL HD series mixer amplifier.

The amplifier output is driven from a high-efficiency class-D amplifier stage. The output level can be VCA controlled using various RDL remote controls (available separately) or by industry standard 0 to 10 VDC or 0 to 10kΩ controls that connect to the rear panel RJ45 jack. The amplifier's output drives 4 or 8 ohms speakers. The output impedance is switch-selectable on the rear panel.

The amplifier enters standby (sleep) mode when audio is absent and automatically turns on when the presence of a signal at the input is detected. 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. The switches can be set to disable the sleep mode for systems specifying continuous amplifier operation.

The amplifier features an analog compressor/limiter for excellent audio fidelity. 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. Increasing the input gain (via the front panel) substantially increases the average output power. 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.

During power-up and power-down, the amplifier output is protected against clicks, pops, and thumping by internal soft-start solid-state switches. The power LED on the front panel indicates active and standby modes. The HD-PA35U Amplifier comes with a 24 VDC power supply, and is equipped with both thermal and short-circuit protection.

One input with front panel volume control
Front panel bass and treble tone controls
Designed as a single zone amplifier
35W RMS amplifier output via detachable terminal block
Master VCA control via RJ45 jack
Unbalanced stereo summing line Input on RCA jacks
Eco standby / sleep mode
Automatic power-up and standby (sleep mode) power-down
Automatic sleep mode meets strict energy saving standards
Programmable sleep mode delay with selectable bypass
25V, 70V, or 100V constant voltage outputs
Includes power supply with North American plug
Compatible with RDL remote level controls
Aurally transparent compressor controls clipping
Compressor maximizes average output power and level
Audio compression threshold LED
High-efficiency class D operation
Thermal and short-circuit protection
Made in USA
In the Box
RDL HD-PA35U 35W Single Input Power Amplifier
  • 24 VDC Power Supply with North American Plug
  • Limited 3-Year Warranty
  • Table of Contents
    • 1Description
    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 (maximum 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 ±1 dB (50 Hz to 20 kHz)
    Tone Controls ±10 dB @ 10 kHz, ±9 dB @ 100 Hz (front panel) with center detent
    Amplifier Power Output: 35 W RMS (4 Ω), 32 W (8 Ω) on detachable terminal block (switch-selectable 4 or 8 Ω impedance); <1% THD+N
    Indicators 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 Input, EQ (bass and treble), power (momentary push button, toggle on/standby)
    Rear Panel Controls Sleep (standby) mode delay (4 binary switches)
    Efficiency Efficiency Standard Used: Energy Star 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 sec (nominal) after input audio detected
    Audio Detector Threshold -42 dBV
    Power Supply 100 to 240 VAC, 50 to 60 Hz, 50 W; 24 VDC output to amplifier chassis
    Ambient Operating Temperature Maximum: 32 to 122°F (0 to 50°C) Recommended: 68°F (20°C)
    Dimensions (H x W x D) 3.5 x 8.5 x 10.0" (8.9 x 21.6 x 25.4 cm)
    Weight 5.6 lb (2.5 kg)
    Packaging Info
    Package Weight 7.795 lb
    Box Dimensions (LxWxH) 17.75 x 9.125 x 3.938"

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