MI254 4-Channel Power Amplifier

Ideal for Home Theater Systems & Distributed Audio Systems

Type: Digital
250 Watts x 4-Channels into 8 Ohms
300 Watts x 4-Channels into 4 Ohms
Power Guard®, Sentry Monitor™, On/Off signal sensing, Bussable inputs
2U rack mountable

Eligible for online purchase?

3 Year Limited Warranty

Add to WishlistRemove From Wishlist

Print this page

COMPARE

Ask an Expert

MI254 4-Channel Power Amplifier

Ideal for Home Theater Systems & Distributed Audio Systems

3 Year Limited Warranty

Print this page

COMPARE

Ask an Expert

Add to WishlistRemove From Wishlist

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: 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 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 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. Contact your local dealer to learn more about integrating the MI254 into your custom audio installation.

Specifications
Electronic Specifications
- FTC Power Output Rating
  
  250 W
- Power Output per Channel
  
  250 W into 8 ohms
  300 W into 4 ohms
- Number of Channels
  
  4
- Total Harmonic Distortion
  
  0.025%
- S/N below rated output
  
  100dB
- Dynamic Headroom
  
  8 ohms: 2.5dB
  4 ohms: 3.5dB
- Damping Factor
  
  8 ohms: >85
  4 ohms: >45
- Rated Power Band
  
  20Hz to 20kHz
- Frequency Response
  
  +0, -0.9dB from 20Hz to 20kHz
Control
- Remote Power Control
  
  Yes
- Multi-Channel DB25 Cable
  
  N/A
Connectivity
- Speaker Binding Post Type
  
  Standard
General Specifications
- Circuit Configuration
  
  Closed loop digital switching
- Circuit Design
  
  Digital
- Mono Bridge
  
  N/A
- Mono Parallel
  
  N/A
- Output Type
  
  Direct Coupled
- Meters
  
  Yes
- Meter Light Switch
  
  No
- Balanced Input
  
  4
- Front Panel
  
  Glass with removable rack mounting ears
- Illumination
  
  Direct LED
- Chassis Style
  
  Black painted steel
- BTU Rating
  
  1000 BTU/h
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)

Downloads

Product Literature	User Documents
MI254 Power Amplifier Brochure (1.14 MB)	MI254 Power Amplifier Owner's Manual (5.05 MB) MI254 Power Amplifier Connection Diagram (1.56 MB)

McIntosh Westchester I home theater system

MI254 4-Channel Power Amplifier is also part of the Westchester I Home Theater System

DISCOVER MORE

More from Power Amplifiers

MC2.1KW 1-Channel Power Amplifier

Ideal for 2-Channel Audio Systems & Home Theater Systems
- Type: Solid State
- 2,000 Watts x 1-Channel
- Tri-chassis design: 2 Power Modules, 1 Output Module
- Dual sets of balanced and unbalanced inputs
- Quad Balanced, Autoformer™, Power Guard®, Sentry Monitor™, Monogrammed Heatsinks™, Solid Cinch™ speaker binding posts
- Multiple speaker terminals for bi- and tri-wiring
MC1.25KW 1-Channel Power Amplifier

Ideal for 2-Channel Audio Systems & Home Theater Systems
- Type: Solid State
- 1,200 Watts x 1-Channel
- Quad Balanced, Autoformer™, Power Guard®, Sentry Monitor™, Monogrammed Heatsinks™, Solid Cinch™ speaker binding posts
MC611 1-Channel Power Amplifier

Ideal for 2-Channel Audio Systems & Home Theater Systems
- Type: Solid State
- 600 Watts x 1-Channel
- Quad Balanced, Autoformer™, Power Guard®, Sentry Monitor™, Monogrammed Heatsinks™, Solid Cinch™ speaker binding posts
MC3500 1-Channel Power Amplifier Mk II

Ideal for 2-Channel Audio Systems
- Type: Vacuum Tube
- 350 Watts x 1-Channel
- A tribute to the original MC3500 – the amplifier that powered Woodstock and Inspired a Generation
- Unity Coupled Circuit Output Transformer
- Power Guard Screen Grid Sensor™, Sentry Monitor™, Solid Cinch™ speaker binding posts
MC830 1-Channel Power Amplifier

Ideal for 2-Channel Audio Systems & Home Theater Systems
- Type: Solid State
- 300 Watts x 1-Channel into 8 Ohms
- 480 Watts x 1-Channel into 4 Ohms
- Power Guard®, Sentry Monitor™, Monogrammed Heatsinks™, Solid Cinch™ speaker binding posts
MC2301 1-Channel Power Amplifier

Ideal for 2-Channel Audio Systems
- Type: Vacuum Tube
- 300 Watts x 1-Channel
- Unity Coupled Circuit Output Transformer
- Quad Balanced, Sentry Monitor™
MC901 1-Channel Power Amplifier

Ideal for 2-Channel Audio Systems
- Type: Hybrid Drive
- 300 Watts x 1-Channel Vacuum Tube Amplifier and 600 Watts x 1-Channel Solid State Amplifier
- The ultimate solution for bi-amping loudspeakers
- Vacuum tube section powers midranges and tweeters; Solid state section drives power hungry woofers
- Quad Balanced, Autoformer™, Unity Coupled Circuit Output Transformer, Power Guard®, Sentry Monitor™, Monogrammed Heatsinks™, Solid Cinch™ speaker binding posts
MC451 1-Channel Power Amplifier

Ideal for 2-Channel Audio Systems
- Type: Hybrid Drive
- 150 Watts x 1-Channel Vacuum Tube Amplifier and 300 Watts x 1-Channel Solid State Amplifier
- The ultimate solution for bi-amping loudspeakers
- Vacuum tube section powers midranges and tweeters; Solid state section drives power hungry woofers
- Autoformer™, Unity Coupled Circuit Output Transformer, Power Guard®, Sentry Monitor™, Monogrammed Heatsinks™, Solid Cinch™ speaker binding posts
MC462 2-Channel Power Amplifier

Ideal for 2-Channel Audio Systems & Home Theater Systems
- Type: Solid State
- 450 Watts x 2-Channels
- Quad Balanced, Autoformers™, Power Guard®, Sentry Monitor™, Monogrammed Heatsinks™, Solid Cinch™ speaker binding posts
MC312 2-Channel Power Amplifier

Ideal for 2-Channel Audio Systems & Home Theater Systems
- Type: Solid State
- 300 Watts x 2-Channels
- Autoformers™, Power Guard®, Sentry Monitor™, Monogrammed Heatsinks™, Solid Cinch™ speaker binding posts
MC152 2-Channel Power Amplifier

Ideal for 2-Channel Audio Systems & Home Theater Systems
- Type: Solid State
- 150 Watts x 2-Channels
- Autoformers™, Power Guard®, Sentry Monitor™
MC2152 70th Anniversary 2-Channel Power Amplifier

Ideal for 2-Channel Audio Systems
- Type: Vacuum Tube
- 150 Watts x 2-Channels
- Striking design with carbon fiber side panels
- Unity Coupled Circuit Output Transformers
- Sentry Monitor™, Solid Cinch™ speaker binding posts
MC1502 2-Channel Power Amplifier

Ideal for 2-Channel Audio Systems
- Type: Vacuum Tube
- 150 Watts x 2-Channels
- Unity Coupled Circuit Output Transformers
- Sentry Monitor™, Solid Cinch™ speaker binding posts
MC275 2-Channel Power Amplifier

Ideal for 2-Channel Audio Systems
- Type: Vacuum Tube
- 75 Watts x 2-Channels or 150 Watts x 1-Channel
- Unity Coupled Circuit Output Transformers
- Sentry Monitor™, Solid Cinch™ speaker binding posts
- One of the most iconic amplifiers ever made
MC303 3-Channel Power Amplifier

Ideal for Home Theater Systems
- Type: Solid State
- 300 Watts x 3-Channels
- Autoformers™, Power Guard®, Sentry Monitor™
MC255 5-Channel Power Amplifier

Ideal for Home Theater Systems
- Type: Solid State
- 250 Watts x 3-Channels or 200 Watts x 5-Channels
- Dynamic Power Manager®; Power Guard®, Sentry Monitor™, Monogrammed Heatsinks™, TripleView™ Power Output Meter
MC257 7-Channel Power Amplifier

Ideal for Home Theater Systems
- Type: Solid State
- 250 Watts x 3-Channels or 200 Watts x 7-Channels
- Dynamic Power Manager®; Power Guard®, Sentry Monitor™, Monogrammed Heatsinks™, TripleView™ Power Output Meter
MC8207 7-Channel Power Amplifier

Ideal for Home Theater Systems
- Type: Solid State
- 200 Watts x 7-Channels
- Dynamic Power Manager®; Power Guard®, Sentry Monitor™, LED output indicators
MI502 2-Channel Power Amplifier

Ideal for Distributed Audio Systems, 2-Channel Audio Systems & Home Theater Systems
- Type: Digital
- 500 Watts x 2-Channels into 8 Ohms
- 800 Watts x 2-Channels into 4 Ohms
- Power Guard®, Sentry Monitor™, On/Off signal sensing
- 2U rack mountable
MI347 7-Channel Power Amplifier

Ideal for Home Theater Systems
- Type: Digital
- 3 Front Channels: 250 Watts into 8 Ohms or 300 Watts into 4 Ohms
- 4 Surround Channels: 125 Watts into 8 Ohms or 200 Watts into 4 Ohms
- Power Guard®, Sentry Monitor™, On/Off signal sensing
- 3U rack mountable
MI128 8-Channel Power Amplifier

Ideal for Distributed Audio Systems & Two-Channel Audio Systems
- Type: Digital
- 120 Watts x 8-Channels into 8 Ohms
- 150 Watts x 8-Channels into 4 Ohms
- Power Guard®, Sentry Monitor™, On/Off signal sensing, Bussable inputs
- 2U rack mountable
MI1250 12-Channel Power Amplifier

Ideal for Distributed Audio Systems
- Type: Digital
- 50 Watts x 12-Channels into 8 Ohms
- 90 Watts x 12-Channels into 4 Ohms
- Power Guard®, Sentry Monitor™, On/Off signal sensing, Bussable inputs
- 2U rack mountable
MC2KW 1-Channel Power Amplifier

Ideal for 2-Channel Audio Systems & Home Theater Systems
- Type: Solid State
- 2,000 Watts x 1-Channel
- Tri-chassis design: 2 Power Modules, 1 Output Module
- Quad Balanced, Autoformer™, Power Guard®, Sentry Monitor™
- Multiple speaker terminals for bi- and tri-wiring
MHA200 2-Channel Headphone Power Amplifier

Ideal for Headphone Listening from 2-Channel Audio Systems
- Type: Vacuum Tube
- Compact footprint: just 6-1/8" (15.6cm) x 9-1/8" (23.2cm)
- 4 selectable headphone impedance ranges
- Balanced and unbalanced analog inputs
- Balanced stereo or dedicated Left & Right outputs