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RDL HD-MA35AX 35W Mixer Amplifier / 2-Zone Class D / VCA Remote / VOX Ducking / 24V PSU

SKU: HD-MA35AX
Brand: RDL
$494.74
Brand RDL
SKU HD-MA35AX
Weight 8.00 lbs
Warranty 3 Years
Condition New
Status Available
Expert

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Description

The HD-MA35AX is a compact mixer amplifier designed to deliver background music, paging, and music-on-hold in small to medium installations. This unit provides two amplifier zones including a 35 W main zone and a 2 W secondary zone. The product ships with a worldwide 24 Vdc power supply for global deployments.

Key features include three shared inputs with individual level controls, front-panel bass and treble tone controls for the main zone, and automatic or manual priority ducking via VOX or contact closure. The main zone uses a high-efficiency Class D output stage and includes an analog compressor/limiter to preserve audio fidelity and prevent clipping. Remote master level control is available via VCA 0 to 10 Vdc or optional RDL wall controls.

Performance specifications include a 35 W RMS constant-voltage main output selectable for 25 V, 70 V, or 100 V systems and a 2 W RMS 8 Ohm secondary output that also provides a 600 Ohm transformer-balanced MOH output. Frequency responses and noise figures are tuned for clear voice and music reproduction, and THD+N is kept below 0.5 percent at the compressor threshold. The compressor provides dynamic time constants and a threshold set 2 dB below rated output to increase average loudness while preventing clipping.

Connectivity is flexible with a balanced mic/line input on a detachable terminal block and two RCA unbalanced stereo inputs summed to mono. Balanced line outputs on a detachable terminal block allow feeding other equipment or amplifiers, and a ground-referenced 24 Vdc output is provided to power optional external RDL modules. Front- and rear-panel controls and indicators make setup and daily operation straightforward.

Typical applications include background music and paging systems in retail, small offices, houses of worship, and hospitality environments. The unit supports paging priority over background sources and supplies music-on-hold outputs for telephony integration. Its compact footprint and low thermal output from the Class D stage make it suitable for shelf, cabinet, or rack-shelf installations.

Installation is installer-friendly with detachable terminal blocks for balanced inputs and outputs, RCA inputs for line sources, front-panel user controls for Zone 1, and rear-panel trimmers for Zone 2. The included universal 100 to 240 Vac power supply delivers regulated 24 Vdc to the amplifier housing. The HD-MA35AX is built and tested in the U.S.A. and includes thermal and short-circuit protection for reliable continuous operation.

Specifications

Amplifier Zones (2):Zone 1 35 W RMS, Zone 2 2 W RMS 8 Ohm
Audio Inputs (3):Input1 balanced mic/line terminal block, Inputs2-3 RCA unbalanced stereo summed mono
Maximum Input Level:Mic -11.5 dBu, Balanced line +19 dBu, Unbalanced +9 dBV (+15.5 dBV one input)
Phantom Voltage:24 Vdc IEC 61938:2013 switch-selectable
Ducking/Muting Actuation:Automatic VOX rear-panel adjustable threshold, Manual contact closure to ground
Ducking/Muting Release Delay:4 seconds nominal
Ducking/Muting:Inputs 2 and/or 3 25 dB attenuation nominal
External RDL Module Power Output:24 Vdc 100 mA max ground-referenced
Input level:to cross compressor threshold equaling 23 W amplified output
Mic Input:-50 dBu 2.5 mV
Balanced line input:-21 dBu 70 mV
Unbalanced Inputs:-15 dBV 180 mV
Noise (line output):Mic -68 dB, Balanced line -72 dB, Unbalanced <-85 dB
Noise (amplified outputs):Mic -68 dB, Balanced line -72 dB, Unbalanced <-75 dB
THD+N:<0.5% main amp at 1 kHz, <0.25% line output
CMRR: Mic input:>50 dB 50 Hz-120 Hz
Compressor:Threshold 2 dB below rated output, auto attack/release
Frequency Response (mixer):Mic to line ±1.5 dB 40 Hz-25 kHz, Balanced line to line ±1 dB 20 Hz-20 kHz, Unbalanced ±0.5 dB 20 Hz-20 kHz
Frequency Response (Zone 1 amplifier):Constant voltage ±3 dB 50 Hz-18 kHz, 4/8 Ohm ±1 dB 50 Hz-20 kHz
Frequency Response (Zone 2 amplifier):8 Ohm ±1.5 dB 50 Hz-20 kHz, 600 Ohm ±1.5 dB 30 Hz-18 kHz
Tone Controls:±10 dB @10 kHz, ±9 dB @100 Hz center detent
Audio Outputs (2):+4 dBu balanced terminal block, 0 dBu balanced zone2 600 Ohm output
MOH Output:0 dBu 775 mV 600 Ohm transformer-isolated >16 dB headroom
Power Amplifier Outputs (2):Zone1 35 W RMS 25/70/100 V, Zone2 2 W 8 Ohm detachable terminal block
Indicators (6):Front 3 signal green, compressor red, power blue bright/dim, Rear ducking threshold yellow
VCA:Zone1 master 0-10 Vdc detachable terminal block compatible RDL wall controls
Front-panel controls (6):Zone1 level controls inputs1-3, EQ bass treble, power latching pushbutton on/standby
Rear-panel controls (9):Mic/Line switch Input1, ducking sensitivity trimmer, phantom switch, ducking switches, Zone2 level trimmers inputs1-3, output impedance 4 or 8 Ohm switch
Ambient Operating Environment:0 C to 50 C max, 20 C recommended
Power Supply (included):100-240 Vac 50-60 Hz 50 W, 24 Vdc output
Dimensions and Weight:H 3.5 in 8.89 cm, W 8.5 in 21.6 cm, D 6.75 in 17.1 cm, Weight 6 lb 2.7 kg
Package Type:Cardboard Box
Tariff code:8518.50.0000
WEEE weight:5.975 lbs
Shipping Weight:7.095 lbs
Package Dimensions:10.75 x 9.125 x 3.9375 in

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