MI254

Digital Amplifier

The MI254 4-Channel Digital Amplifier is a versatile multi-channel amplifier ideal for use in distributed audio, home theater or 2-channel stereo playback.

Delivers 250 Watts into 8 Ohm speakers or 300 Watts into 4 Ohm speakers via highly sophisticated closed loop digital switching amplifiers that are paired with extremely robust power supplies to produce performance levels that are rarely achieved in distributed audio.

Installer-friendly physical dimensions and is 2U rack mountable via the included mounting ears (ears are removable for non-rack installations).

As a highly efficient Class D amplifier, it does not require noisy cooling fans to maintain nominal operating temperature.

Two McIntosh Watt Meters display the summed power output of channels 1 + 2 and channels 3 + 4. Multi-color LED indicators display the status of each channel. Features a balanced and unbalanced input for each channel along with our standard 5-way speaker binding posts.

Other features included: Power Guard® signal overload technology that prevents overdriving the speakers; Sentry Monitor™ short-circuit protection that disengages the output stage before current exceeds safe operating levels; BUS input & outputs to easily distribute a stereo signal to multiple outputs and/or multiple amplifiers; individual channel inputs; 12 Volt triggering capabilities; and eco-friendly on/off signal sensing.

• Power Output: 250 Watts into 8 Ohm speakers, 300 Watts into 4 Ohm speakers
• Total Harmonic Distortion: 0.025% maximum from 20 Hz to 20 kHz
• Signal to Noise Ratio: 100 dB
• Dynamic Headroom: 8 Ohms: 2.5 dB, 4 Ohms: 3.5 dB
• Damping Factor: 8 Ohms: > 85, 4 Ohms: > 45
• Frequency Response: +0, -0.9 dB from 20 Hz to 20 kHz
• Inputs: 4x Balanced, 4x Unbalanced, 2x BUS
• Dimensions (without mounting ears): 445 x 110 x 533 mm