The ALF-MA15075D is a compact digital mixing amplifier designed for low or high impedance applications. The mode selector switch allows it to deliver either two channels of 75 watts per channel into 4 or 8 Ω, or a single channel of 150 watts at 70 or 100 V. The use of a Class-D amplifier provides power efficiency and energy-saving. In addition to the amplified speaker output, a line level audio output allows the mixed audio signals to be sent to an additional amplifier or other audio system.
Feature:
· Inputs: 2 x Dante audio, 1 x optical audio, Stereo balanced analog input, 2 x balanced microphone inputs
· Outputs: 1 x balanced line level outputs, Stereo Low Impedance amp out, 1 x 70V/100V amplifier output
· Selectable low or high-impedance operation.
· 2 x 75 watts @ 4 or 8 Ω.
· 1 x 150 watts @ 70 or 100 V.
· Class-D amplifier design.
· Automatic standby after a period of inactivity to minimize power consumption.
· Rear panel input level controls for setting Microphones input gain.
· Low inrush current to prevent audible “thumps” when multiple amps are powered on simultaneously.
· Balanced analog audio output for pass-through to an additional amplifier or audio system.
· Basic integrated DSP functions including five-band Graphic equalizer.
· GUI Webserver with TCP/IP control for remote control or third-party integration.
· Trigger port for external mute/ unmute trigger.
· Front panel signal status LEDs for power, panel button lock, audio source, mute, and real-time volume level.
· 1U Size
Input Signal | ||
Mic Input | 2.2 kΩ | |
Mic gain adjustment range | 0dB to +36dB | |
Analog Input | Balanced: 20 kΩ, unbalanced: 10 kΩ | |
CMRR | 51 dB / 58 dB | |
Output Signal | ||
Distributed speakers (mono) | 70 V / 100 V | |
Program speakers (stereo) | 4 Ω / 8 Ω, line-level | |
Power | 70 Vrms = 150 W (bridge mode)
100 Vrms = 150 W (bridge mode) 4 / 8 Ω = 75 W per channel |
|
Audio Processing | ||
Sampling Rate | 48 kHz / 24-bit | |
Signal Processing |
Volume, Auto on / off signal sensing.
Adjustable HPF, default setting of 100 Hz |
|
Equalization |
5-band, adjustable: 40 Hz, 150 Hz,
500 Hz, 2 kHz, and 10 kHz bands Range: -10 dB to +10 dB |
|
Audio Performance | ||
Frequency Response | 20 Hz – 20 kHz, ±2 dB @ 4 Ω load | |
THD + N | < 0.1% @ 1kHz, 3 dB below clipping | |
SNR | > 90 dBA WTD | |
Damping Factor | < 90 @ 8 Ω | |
Amplifier Type | Class D | |
Temperature | Fahrenheit | Celsius |
Operating Temperature | 32 °F to 122 °F | 0 °C to 50 °C |
Storage Temperature | -40 °F to 158 °F | -40 °C to 70 °C |
Relative Humidity (RH) | 20% to 90% RH, non-condensing | |
Dimensions | ||
Physical Dimensions
(Width x Depth x Height) |
320mm x 245mm x 45mm
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|
Power | ||
Standby Mode |
Standby after 5-30 minutes
(adjustable) of no signal. |
|
Consumption | 150 W (max.) | |
Supply | 100 – 240 V AC, 50/60 Hz, 150 W |