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RDL HD-MA35 35 Watt Mixer Amplifier with Power Supply - Low Impedance Output 4 Ohm or 8 Ohm
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    RDL HD-MA35 35 Watt Mixer Amplifier with Power Supply - Low Impedance Output 4 Ohm or 8 Ohm

    Manufacturer: Radio Design Labs

    Item #: RDL-HD-MA35   •   MFG #: HD-MA35


    List Price:$368.80
    Our Price:$246.69

    free ship
    Availability: Usually ships in 3-10 business days
    This item is currently out of stock and will ship the minute we receive it – typically 3-10 business days. Need it sooner? Expedited delivery options may be available. Email [email protected] or call customer service at 800-522-2025 and we’ll make it happen.



      The HD-MA35 is a three input audio mixer amplifier for systems demanding a broad range of features and high energy efficiency. Two output power amplifier zones are provided, 35 W (Zone 1) and 2 W (Zone 2). The Zone 1 output is driven from a high-efficiency Class D amplifier stage. The Zone 1 amplifier output level may be VCA controlled using various optional RDL remote controls, or by industry standard 0 to 10 Vdc or 0 to 10 kΩ controls. This output drives 4 Ω or 8 Ω speakers. The output impedance is switch-selectable on the rear panel. The Zone 2 amplifier output drives an 8 Ω speaker and/or 600 Ω telephone equipment. The HD-MA35A has all the features of the HD-MA35 except its 35 W (Zone 1) amplifier provides a constant voltage output (25 V, 70 V or 100 V) instead of a low impedance speaker output. The HD-MA35 is engineered and manufactured in the U.S.A.The HD-MA35 features two mixers. The Zone 1 mixer is located on the front-panel providing user level and tone controls for the 35 W amplifier output. The tone controls adjust the equalization at the Zone 1 amplifier output. The Zone 2 mixer on the rear panel provides level trimmers normally set by the installer to provide music-on-hold and/or for background music in a small zone equipped with an 8 Ω speaker. The Zone 2 section includes a 2 W amplifier and a 600 Ω transformer-balanced MOH output.

      • Features

        • Three inputs with individual front-panel volume controls
        • Bass and Treble tone controls
        • Designed for background music with paging and music-on-hold
        • Master volume VCA controlled with remote adjustment capability
        • Manual or automatic (VOX) priority ducking
        • Balanced inputs and amplified outputs on detachable terminal blocks
        • Unbalanced inputs and outputs on RCA jacks
        • Includes power supply
        • High-efficiency Class D operation
      • Specifications

        • Amplifier Zones (2): Zone 1 (Main): 35 W RMS, front-panel mixer (user controls); Zone 2: 2 W RMS (8 Ohms), rear-panel mixer (trimmers)Audio Inputs (3): Balanced, mic or line switch selectable on terminal block; 2, unbalanced stereo summingInputs on RCA jacks
        • MaximumInput Level: MicInput: -11.5 dBu; Balanced lineInput: + 19 dBu; UnbalancedInputs: + 9 dBV (+15.5 dBV, one input); (for 1% THD+N at output)
        • Phantom Voltage: 24 Vdc (IEC 61938: 2013), switch-selectable for the mic input
        • Ducking/Muting Actuation: Automatic Input 1 VOX: rear-panel adjustable signal threshold with LED indicator) or Manual (contact closure to ground)
        • Ducking/Muting Release Delay: 4 seconds, nominal
        • Ducking/Muting: Switch-selectable forInputs 2 and/or 3, 25 dB ducking attenuation, nominal
        • External RDL ModulePower Output: 24 Vdc, 100 mA maximum, ground-referencedInput level: (to cross compressor threshold equaling 23 W amplified output)
          MicInput: -50 dBu (2.5 mV), (front panel gain at max.)
          Balanced lineInput: -21 dBu (70 mV), (front panel gain at max.)
          UnbalancedInputs: -15 dBV (180 mV, front panel gain at max., bothInputs driven)
        • Noise (line output): MicInput: -68 dB, Balanced lineInput: -72 dB (below compressor threshold at max gain);
          UnbalancedInputs: <-85 dB (max gain)
        • Noise (amplified outputs): MicInput: -68 dB, Balanced lineInput: -72 dB (below compressor threshold at max gain);
          UnbalancedInputs: <-75 dB (max gain)
        • THD+N: < 0.5% (1 kHz at compressor threshold, main amp output); < 0.25% (line output, main)
        • CMRR: MicInput: > 50 dB (50 Hz to 120 Hz); Balanced lineInput: > 80 dB (50 Hz to 120 Hz, transformer-coupled input)
        • Compressor: Threshold 2 dB below rated output, automatically adjusting attack and release times
        • Frequency Response (mixer): Mic to line output: ±1.5 dB (40 Hz to 25 kHz); Balanced lineInput to line output: ±1 dB (20 Hz to 20 kHz); Unbalanced lineInput to line output: ±0.5 dB (20 Hz to 20 kHz)
        • Frequency Response (Zone 1 amplifier): ±1 dB (50 Hz to 20 kHz)
        • Frequency Response (Zone 2 amplifier): 8 Ohm: ±1.5 dB (50 Hz to 20 kHz); 600 Ohm: ±1.5 dB (30 Hz to 18 kHz)
        • Tone Controls: ±10 dB @ 10 kHz, ±9 dB @ 100 Hz (front-panel) with center detent
        • AudioOutputs (2): +4 dBu nominal (1.23 V), balanced, terminal block (FLAT); 0 dBu nominal balanced, terminal block (zone 2 mixer, 600 Ohm output)
        • MOH Output: 0 dBu nominal (775 mV), 600 Ohm transformer-isolated, >16 dB headroomPower AmplifierOutputs (2): Zone 1 (main, <1% THD+N): 35 W RMS (4 Ohms), 32 W (8 Ohms) on detachable terminal block (switch-selectable 4 or 8 Ohm impedance); Zone 2: 2 W (8 Ohms, on detachable terminal block)
        • Indicators (6): Front-panel: Signal present (3; 1 per input, green), Compressor activity (red),Power (bright=on, dim=standby, blue); Rear-panel: Ducking/muting threshold (yellow)
        • VCA: Zone 1 (main) master level, 0 to 10 Vdc control, detachable terminal block (compatible with RDL VCA wall controls)
        • Front-panel controls (6): Zone 1 (main) mixerLevel controls (3,Inputs 1 through 3), EQ (2, bass and treble),Power (latching pushbutton, on/standby)
        • Rear-panel controls (9): Mic/Line switch Input 1),Input 1 ducking/muting detector sensitivity trimmer, Phantom voltage switch Input 1), Ducking control switches (2, to duckInputs 2 and/or 3), Zone 2 mixerLevel controls (3,Inputs 1 through 3), HD-MA35: Output impedance switch 4 or 8 OhmsAmbient Operating Environment: 0° C to 50° C Maximum; 20° C RecommendedPower 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: 6.75 in.(17.1 cm); Weight: 4.5 lb.(2 kg)Package Type: Cardboard Box
        • Package Dimensions: 10.75 x 9.125 x 3.9375 in.
        • Shipping Weight: 5.08 lbs.
        • WEEE weight: 3.98 lbs.
        • Tariff code: 8518.50.0000

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