MI254 4-Channel Digital Amplifier
MI254: £6495
Perfect for home theatre surround sound speakers
250 Watts into 8 Ohms
300 Watts into 4 Ohms
2U rack-mountable
It can also be used in distributed audio
Bussable inputs
Signal sensing
Power Guard® and Sentry Monitor™
The MI254 4-Channel Digital Amplifier is a versatile multi-channel amplifier ideal for use in distributed audio, home theatre 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 a nominal operating temperature. In addition to distributed audio use, the MI254 is well suited for home theatres to drive surround sound speakers and could be integrated into virtually any existing home theatre system.
On the front panel are two blue McIntosh Watt Meters displaying the summed power output of channels 1 + 2 and 3 + 4. Multi-color LED indicators display the status of each channel. The back panel includes a balanced and unbalanced input for each channel and our standard 5-way speaker binding posts.
Other features that come with the MI254 are Power 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 quickly distribute a stereo signal to multiple outputs and 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 amp 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.
MI254 4-Channel Solid State Amplifier TECHNICAL SPECIFICATIONS
FTC Power Output Rating:
250 W
Total Harmonic Distortion:
0.025%
Damping Factor:
8 ohms: >85
4 ohms: >45
Power Output per Channel:
250 W into 8 ohms
300 W 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 20kHz
WARRANTY PARTS AND LABOUR:
3 Years
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
Speaker Binding Post Type:
Standard
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)