ACM a2400 Power Amplifier


The a Series professional power amplifiers offer ACM renowned integrity and can handle exceptionally high power ratings in a compact, light weight 2RU package. The a Series amps also feature Automatic Clip Limiting to protect connected drivers;Impedance sensing to accommodate varying impedance outputs; tunnel cooled,high efficiency heat sinks; and variable speed DC fans to limit the operating temperature and extend amplifier life. Models in the series include the a1800, a2400 and a3000.

ACM a2400 Front

Minimum Guaranteed Power

1 kHz with 0.5% THD

Stereo, 4 ohms (per ch.) 1280W
Stereo, 8 ohms (per ch.) 800W
Bridge mono, 8 ohms 2400W


Sensitivity (volts RMS) for full rated
power at 8 ohms
0.775V, 32dB, 26dB
Frequency Response
(at 1 watt, 20Hz - 25 kHz)
+0dB, -0.5dB
Phase Response
(at 1 watt , 20Hz to 20 kHz)
Signal to Noise Ratio below rated power
Total Harmonic Distortion (THD)
at 1 full bandwidth power, from 20 Hz to 20 kHz
Intermodulation Distortion (IMD) 60 Hz
and 7 kHz at 4:1,
from full rated output to -35 dBt
Damping Factor (8 ohm): 20 Hz to 400 Hz  
Low Cut:Linkwitz-Riley
Low Pass:Linkwitz-Riley
(below rated power, 20 Hz to 20 kHz)
Common Mode Rejection
(CMR)(20 Hz to 1 kHz)
DC Output Offset (Shorted input)  
Input Impedance
(nominally balanced, nominally unbalanced)
20 kilohms, 10 kilohms
Voltage Gain
(at maximum level setting)
40.3dB gain at 0.775volt sensitivity
Load Impedance
(Note: Safe with all types of loads)
Stereo Bridge 4-8 ohms
Mono 8 ohms
AC Line Voltage and Frequency Configurations
Available (±10%)
~220-240 V and 50/60 Hz
AC Line Current
(both amplifiers draw no more than 90 watts at idle)


Ventilation Flow-through ventilation from front to back
Cooling Proportional speed fan
Dimensions H × W × D: 89mm×483mm×462mm
Net Weight 18kg
Shipping Weight 21kg