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Description
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 ampl... Read MoreRetail Price: $510.49 Our Price: $382.87
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Description
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 kO controls. This output drives 4 O or 8 O speakers. The output impedance is switch-selectable on the rear panel. The Zone 2 amplifier output drives an 8 O speaker and/or 600 O 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.
Features:
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 O speaker. The Zone 2 section includes a 2 W amplifier and a 600 O transformer-balanced MOH output. The HD-MA35 is equipped with a master VCA for remote adjustment of the Zone 1 amplifier output. A detachable terminal block is provided for direct connection of an optional RDL remote level control.
The HD-MA35 has three inputs that are common to both mixers. Input 1 accepts a balanced mic or line level source. Inputs 2 and 3 accept unbalanced mono or stereo line-level sources. Input 1 is switch-selectable MIC or LINE. Phantom voltage (IEC standard 24 Vdc) is switch-selectable for the microphone input. The line input is transformer isolated and accepts balanced or unbalanced, high or low impedance audio sources. A paging source is normally connected to Input 1. This input is equipped with push-to-talk terminals and with an adjustable threshold VOX circuit with LED threshold indicator, either (or both) of which may be set to duck ("fade down" or "mute") inputs 2 and/or 3 by 25 dB when a paging signal is active on Input 1. The attenuated inputs fade up to normal volume when the paging message is finished. Inputs 2 and 3 each provide unbalanced stereo RCA input jacks, summed to mono.
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Product Specs
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 summing inputs on RCA jacks |
Maximum Input Level: | Mic Input: -11.5 dBu; Balanced line input: + 19 dBu; Unbalanced Inputs: + 9 dBV (+15.5 dBV, one input); (for 1% THD+N at output) |
Phantom Voltage: | 24 Vdc (IEC 1938: 1996-12), 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 for inputs 2 and/or 3, 25 dB ducking attenuation, nominal |
External RDL Module Power Output: | 24 Vdc, 100 mA maximum, ground-referenced |
Input level: | (to cross compressor threshold equaling 23 W amplified output) Mic Input: -50 dBu (2.5 mV), (front panel gain at max.) Balanced line input: -21 dBu (70 mV), (front panel gain at max.) Unbalanced Inputs: -15 dBV (180 mV, front panel gain at max., both inputs driven) |
Noise (line output): | Mic input: -68 dB, Balanced line input: -72 dB (below compressor threshold at max gain); Unbalanced Inputs: <-85 dB (max gain) |
Noise (amplified outputs): | Mic input: -68 dB, Balanced line input: -72 dB (below compressor threshold at max gain); Unbalanced Inputs: <-75 dB (max gain) |
THD+N: | < 0.5% (1 kHz at compressor threshold, main amp output); < 0.25% (line output, main) |
CMRR: Mic input: | > 50 dB (50 Hz to 120 Hz); Balanced line input: > 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 line input to line output: ±1 dB (20 Hz to 20 kHz); Unbalanced line input 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 |
Audio Outputs (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 headroom |
Power Amplifier Outputs (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) mixer level 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 duck inputs 2 and/or 3), Zone 2 mixer level controls (3, inputs 1 through 3), HD-MA35: Output impedance switch 4 or 8 Ohms |
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: 6.75 in.(17.1 cm); Weight: 4.5 lb.(2 kg) |
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