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HD-MA35U 35W 带电源混音放大器 -- 4Ω 或 8Ω 低阻输出
●  四个独立音量控制的输入
●  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
●  自动眠休模式

 

  • 技术参数
  • 资料下载
Amplifier Zones (2):
Zone 1 (Main): 35 W RMS, front-panel mixer (user controls);
Zone 2: 4 W RMS (8 Ohms), rear-panel mixer (trimmers)
Audio Inputs (5):
2, balanced, mic or line switch selectable on terminal blocks; 2, unbalanced stereo summing inputs on RCA jacks; 1, unbalanced amp in on RCA jack
Gain Adjustments (2):
Inputs 1 and 2: Rear-panel single-turn trimmer
Maximum Input Level:
Mic Input: -9 dBu; Balanced line input: + 20 dBu;
Unbalanced Inputs: + 5 dBV (+11dBV, 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 : Rear-panel single-turn trimmer, adjustable 2 to 6 seconds
Ducking/Muting:
Switch-selectable for inputs 2, 3 and/or 4, 25 dB ducking attenuation, nominal
Effects Loop:
Unbalanced RCA jacks (preamp output from main mixer, input to power amplifier)
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 and rear trimmer at max.)
Balanced line inputs: -21dBu (70 mV), (front panel and rear trimmer at max.)
Unbalanced Inputs: -15 dBV (180 mV, front panel and rear trimmer at max., both inputs driven)
Noise (line or amplified outputs):
Mic or balanced line inputs: -70 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);
< 0.1% (line output, main)
CMRR: Mic inputs:
> 50 dB (50 Hz to 120 Hz);
Balanced line inputs: > 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 ( amplifier):
1 dB (50 Hz to 20 kHz)
Tone Controls:
±10 dB @ 10 kHz, ±9 dB @ 100 Hz (front-panel) with center detent
Audio Outputs (2):
+10 dBV nominal (316 mV),  dual mono unbalanced RCA (main mixer; FLAT or EQUALIZED, switch-selectable on rear panel); 0 dBu nominal balanced, terminal block (zone 2 mixer)
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: 4 W (8 Ohms, on detachable terminal block)
Indicators (9):
Front-panel: Signal present (4; 1 per input, green), Compressor activity (red), Power (bright=on, dim=standby, blue); Rear-panel: dual-LED VU meter (for inputs 1 and 2, green/red), Ducking/muting threshold (yellow)
VCA :
 Zone 1 (main) master level (with switch-selectable input 1 bypass), 0 to 10 Vdc control, RJ45 (compatible with RDL VCA wall controls)
Front-panel controls (7):
Zone 1 (main) mixer level controls (4, inputs 1 through 4), EQ (2, bass and treble), Power (momentary pushbutton, toggle on/standby)
Rear-panel controls (22):
Gain trimmers (2, input 1 and 2), Mic/Line switch (2, input 1 and 2), Zone 1 line output pre/post-EQ switch, Effects loop bypass switch, Sleep (standby) mode delay (4 binary switches), Input 1 ducking/muting detector sensitivity trimmer, Phantom voltage switches (2, input 1 and 2), Ducking control switches (3, to duck inputs 2, 3, and/or 4), VCA paging bypass (includes or excludes input 1 from master VCA control), Zone 2 mixer level controls (4, inputs 1 through 4)
Efficiency Standard:
“Energy Star® Program Requirements for Audio/Video” Version 2.0
Sleep Mode Power Consumption:
< 1 W (amplifier and included power supply)
Sleep Mode Delay:
10 minutes to 2 hours (switch-selectable in 10 minute increments)
Sleep Mode Disable : Selectable
Active Mode Delay:
2 seconds (nominal) after input audio detected
Audio Detector Threshold:
-80 dBu mic (at max input gain), -55 dBu balanced line (at max input gain), -42 dBV unbalanced
Dims: H 8.89 cm; W 21.6 cm; D 25.4 cm
Weight: 2.5 kg
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