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RDL HD-RA35UX 35W Mixer Amplifier / Class D / Paging VOX Ducking / Dual Zone / 24V PSU

SKU: HD-RA35UX
Brand: RDL
$588.65
Brand RDL
SKU HD-RA35UX
Weight 9.00 lbs
Warranty 3 Years
Condition New
Status Available
Expert

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Description

The HD-RA35UX is a compact four-input mixer amplifier engineered for background music, paging and music-on-hold applications. It provides two Class D amplifier zones – a 35 watt main zone and a 4 watt secondary zone – and includes a worldwide 100-240 Vac to 24 Vdc power supply. The design focuses on audio clarity, efficient power use and seamless paging integration.

Key features include a front-panel paging input with level control, three VCA-controlled user inputs adjustable via optional remote controls, and bass and treble tone controls. The unit supports manual or automatic (VOX) priority ducking that attenuates secondary inputs during paging events. A compressor/limiter in the main output preserves dynamics while preventing clipping and improving average output levels.

Inputs 1 and 2 accept balanced mic or line sources with switch-selectable phantom 24 Vdc and rear-panel gain trimmers for precise gain staging. Inputs 3 and 4 use unbalanced RCA jacks summed to mono for stereo sources. Outputs include a detachable terminal block for the main speaker output, an 8 ohm secondary speaker output, a transformer-isolated 600 ohm MOH output and dual-mono RCA line outputs.

Connectivity covers detachable balanced terminal blocks, unbalanced RCA jacks, an RJ45 port for RDL remote VCA controls and an effects loop for external processing. Remote VCA control uses 0-10 Vdc over RJ45 allowing wall-mounted volume controls without running audio lines. The included external 24 Vdc power supply supports worldwide mains voltages and a rear terminal offers 24 Vdc power for optional RDL modules.

The HD-RA35UX is intended for small-to-medium installations requiring reliable background music, paging and hold music. Typical applications include retail shops, offices, medical suites, call centers and small hospitality zones where clear paging and automatic ducking are needed. The secondary zone supports music-on-hold or a small local speaker and the balanced line outputs feed additional amplification or recording devices.

Installation and operation emphasize energy efficiency and protection. An automatic sleep mode reduces standby power to under 1 W and the sleep delay is switch-selectable from 10 minutes to 2 hours or disabled for continuous operation. The unit includes soft-start switching, thermal protection and short-circuit protection and is engineered and manufactured in the U.S.A.

Specifications

Amplifier Zones (2)Zone 1: 35 W RMS 4 Ohm, 32 W 8 Ohm; Zone 2: 4 W 8 Ohm
Audio Inputs (5)2 balanced mic/line terminal, 2 unbalanced stereo RCA summed, 1 unbalanced amp in RCA
Gain Adjustments (2)Inputs 1 and 2 rear-panel trimmers
Maximum Input LevelMic -9 dBu, Balanced line +20 dBu, Unbalanced +5 dBV/+11 dBV
Phantom Voltage24 Vdc IEC 61938:2013 switch-selectable
Ducking/Muting ActuationAutomatic VOX input1 adjustable threshold LED or Manual contact closure
Ducking/Muting Release Delay2 to 6 seconds rear-panel trimmer
Ducking/MutingSwitch-selectable duck inputs 2 3 4 25 dB attenuation
Effects LoopUnbalanced RCA preamp send/return bypass switch
External RDL Module Power Output24 Vdc 100 mA ground-referenced
Input level (to cross compressor threshold)Mic -50 dBu; Balanced line -21 dBu; Unbalanced -15 dBV
NoiseMic/Balanced -70 dB; Unbalanced <-75 dB
THD+N<1% main amp at 1 kHz threshold; <0.1% line out
CMRRMic >50 dB 50-120 Hz; Balanced line >80 dB 50-120 Hz
CompressorThreshold 2 dB below rated output auto attack/release
Frequency Response (mixer)Mic to line ±1.5 dB 40 Hz-25 kHz; Balanced line ±1 dB 20 Hz-20 kHz; Unbalanced ±0.5 dB 20 Hz-20 kHz
Frequency Response (amplifiers)±1 dB 50 Hz-20 kHz
Tone ControlsBass ±9 dB @100 Hz Treble ±10 dB @10 kHz center detent
Audio Outputs (2)Dual-mono RCA -10 dBV; Zone2 balanced 0 dBu terminal
MOH Output0 dBu 600 Ohm transformer-isolated
Power Amplifier Outputs (2)Zone1 switchable 4 Ohm/8 Ohm; Zone2 8 Ohm
Indicators (9)Front input LEDs 4, compressor red, power blue dim/bright; Rear dual-LED VU, duck threshold yellow
VCA (3)Zone1 inputs 2 3 4 0-10 Vdc RJ45
Front-panel controls (4)Paging level EQ bass treble Power pushbutton
Rear-panel controls (22)Gain trimmers 2 Mic/Line switches 2 Line out pre/post EQ Effects loop bypass Sleep delay DIP Phantom switches Ducking switches Tone bypass Zone2 mixer controls
Efficiency StandardEnergy Star Program Requirements Audio/Video V2.0
Sleep Mode Power Consumption< 1 W
Sleep Mode Delay10 minutes to 2 hours switch-selectable
Sleep Mode DisableSelectable
Active Mode Delay2 seconds nominal
Audio Detector Threshold-80 dBu mic -55 dBu balanced line -42 dBV unbalanced
Ambient Operating Environment0 C to 50 C
Power Supply (included)100-240 Vac 50-60 Hz 50 W to 24 Vdc
Dimensions and WeightH 3.5 in W 8.5 in D 10 in Weight 5.6 lb
Package TypeCardboard Box
Tariff code8518.50.0000
WEEE weight6.36 lbs
Shipping Weight8.095 lbs
Package Dimensions17.75 x 9.125 x 3.9375 in

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