Description
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. It delivers 250 Watts into 8 Ohm speakers or 300 Watts into 4 Ohm speakers via its highly sophisticated closed-loop digital switching amplifiers. These amplifiers are paired with extremely robust power supplies that produce performance levels rarely achieved in distributed audio.
It has installer-friendly physical dimensions and is 2U rack-mountable via the included mounting ears (the mounting 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. In addition to distributed audio use, the MI254 is well suited for home theaters to drive surround sound speakers and could be integrated into virtually any existing home theater system.
On the front panel are two blue McIntosh Watt Meters that display the summed power output of channels 1 + 2 and channels 3 + 4. Multi-color LED indicators display the status of each channel. The back panel includes both a balanced and unbalanced input for each channel along with our standard 5-way speaker binding posts.
Other features that come with the MI254 are: Loudspeaker Guard signal overload technology that prevents overdriving the speakers; our Sentry Monitor™ short-circuit protection circuit that disengages the output stage before current exceeds safe operating levels and then resets automatically when operating conditions return to normal; 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 that turns the unit off if no input signal has been detected for a set amount of time or automatically turns the amplifier on when it senses a signal.
The MI254 includes many McIntosh design cues including a black glass front panel, blue Watt meters, an illuminated McIntosh logo, and a familiar form factor highlighted by silver trim. Contact your local dealer to learn more about integrating the MI254 into your custom audio installation.
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: Loudspeaker 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 per Channel:
– 250 Watts into 8 Ohms
– 300 Watts into 4 Ohms
S/N below rated output:100dB
Rated Power Band: 20Hz to 20kHz
Number of Channels: 4
Dynamic Headroom: 8 Ohms: 2.5dB, 4 Ohms: 3.5dB
Frequency Response: +0, -0.9dB from 20Hz to 20,000Hz
Total Harmonic Distortion: 0.025%
Damping Factor: 8 Ohms: >85 ; 4 Ohms: >45
CONTROL
Remote Power Control: Yes
Multi-Channel DB25 Cable: N/A
Speaker Binding Post Type: Standard
GENERAL SPECIFICATIONS
Circuit Configuration:Closed loop digital switching
Mono Parallel:N/A
Meter Light Switch:No
Illumination:Direct LED
Circuit Design:Digital
Output Type:Direct Coupled
Balanced Input:4
Chassis Style:Black painted steel
Mono Bridge:N/A
Meters:Yes
Front Panel:Glass with removable rack mounting ears
WEIGHTS & DIMENSIONS
Unit Dimensions (W x H x D):
17-1/2″ (44.45cm) (19″ (48.3cm with mounting ears)) x 4-5/16″ (11cm) (including feet) x 21″ (53.3cm) (including front panel and cables)
Unit Weight:23.5 lbs (10.7 kg)
Shipping Weight:40 lbs (18.1 kg)
