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HD-MA35A 35W 带电源混音放大器 -- 25V/70V/100V 恒压输出
●  三个独立的前面板音量控制输入
●  低音和高音控制
●  为广播和音乐保持背景音乐而设计
●  可以远程调节的主音量值控制放大器(VCA)
●  手动或自动(VOX)优先闪避
●  可拆式接线板上的平衡输入和放大输出
●  非平衡输入和输出RCA插孔
●  包括电源
●  高效率D类放大电路
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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, switch-selectable for the mic input
Ducking/Muting Actuation:
Automatic (Input 1 VOX: rear-panel adjustable signal thresholdwith 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):
Constant voltage: ±3 dB (50 Hz to 18 kHz); 4/8 Ohm: ±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): 35 W RMS (25, 70 or 100 V);
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
Dims: H 8.89 cm; W 21.6 cm; D 17.1 cm
Weight: 3.2 kg
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