For screen reader problems with this website, please call(703) 218-98557 0 3 2 1 8 9 8 5 5Standard carrier rates apply to texts.

We offer FREE Shipping! Same Day Shipping on most products too!

McIntosh® MC255 5-Channel Power Amplifier-MC255

Model #: MC255
At a Glance

Give your home theater the power it deserves with the MC255 5-Channel Home Theater Power Amplifier.

Available in Store Only
$8,000.00Save $NaN

Get to know this product.

  • 250 Watts x 3 Channels; 200 Watts x 5 Channels
  • TripleView Power Output Meter
  • More than 100% increase in Dynamic Headroom
  • Dynamic Power Manager; Power Guard
  • Designed for home theaters

The MC255 features our striking new TripleView™ Power Output Meter that independently indicates the real time power reading of the amplifier’s three front channels. Instead of three separate meter windows each housing a single meter as found on our previous 5-channel home theater amplifier, the easy-to-read, 15” (38 cm) wide TripleView features three of our traditional mechanical meters in a single meter enclosure. While a totally new design, each of the three peak responding pointers in the TripleView meter have the same enticing motion that McIntosh meters are known for and function at the same high level as any of our meters. The enchanting look and welcoming glow of the TripleView meter is sure to draw interest from friends and family, but its trademarked blue lighting can be turned off so as not to compete with your TV or movie screen.

Besides the new TripleView meter, the MC255 has received many other performance upgrades to deliver an unforgettable cinema experience in your home theater. Filter capacity has been increased by 50% which has more than doubled dynamic headroom from 1.7dB to 3.6dB – a key feature in a home theater amplifier – as well as improving the performance of low frequencies. When using just the front left, center and right channels, power output has been increased by 25% from 200 Watts per channel (WPC) to 250 WPC. When using all 5 channels, each will receive a healthy 200 WPC. Regardless of how many channels are used, the full 200 or 250 Watts is delivered to either 4 or 8 Ohm speakers via our Dynamic Power Manager® (DPM) technology.

The MC255 runs cool and quiet thanks to four of our McIntosh Monogrammed Heatsinks™ which are connected to advanced high current output transistors that efficiently and silently cool the amplifier; as a result, noisy cooling fans that can interfere with the movie soundtrack are not needed. A quiet, specially wound toroidal isolation power transformer also helps keep noise to a minimum. Speaker terminals have been updated to our standard gold-plated binding posts that prevent corrosion and ensure a quality signal is sent to your home theater speakers. Traditional McIntosh knobs now adorn the front panel to control the meter lights and power function. Direct LED backlighting has been added to the front panel for improved color accuracy and durability. Our eco-friendly power management system that will turn the amplifier off after a set amount of time when no input signal has been detected is also now included.

While the MC255 has received many upgrades, it also comes with hallmark McIntosh technologies such as Power Guard® that prevents potential speaker damage caused by clipping and over-driving of the amplifier, and Sentry Monitor™ that protects against short-circuits by disengaging the output stage should the current ever exceed safe operating levels (it then resets automatically when operating conditions return to normal). Both balanced and unbalanced inputs are included to connect your home theater processor to the MC255 home theater amplifier.

The MC255 can be used to power a conventional 5-channel home theater; it can be paired with either our MI128 or MI254 digital amplifiers in home theaters that have additional surround sound speakers for use with object-based 3D audio formats such as Dolby® Atmos, DTS:X™ and Auro-3D®; or it can be used in a two zone configuration with the three front channels used at 250 WPC in one zone and the two surround sound channels used at 200 WPC in a second audio zone in your home.

The MC255 bears the classic McIntosh design of a black glass front panel with the TripleView meter, illuminated logo, control knobs, and aluminum end caps.



Power Output per Channel3 Front Channels only: 250W @ 4 or 8 Ohms; All 5 Channels: 200W @ 4 or 8 Ohms
S/N below rated output108dB
Rated Power Band20Hz to 20kHz
Number of Channels5 (can also be used as a 2-zone amplifier with 3 channels in zone A and 2 channels in zone B)
Dynamic Headroom3.6dB
Frequency Response+0, -0.25dB from 20Hz to 20,000Hz; +0, -3dB from 10Hz to 100,000Hz
Total Harmonic Distortion0.005%
Damping Factor>70 @ 4 Ohms; >140 @ 8 Ohms


Remote Power ControlYes, 5 or 3 + 2 Channel
Multi-Channel DB25 CableYes


Speaker Binding Post TypeStandard


Circuit ConfigurationPush-Pull Complementary
Mono ParallelNo
Meter Light SwitchYes
IlluminationDirect LED
Circuit DesignSolid State
Output TypeDirect Coupled with Dynamic Power Manager®
Balanced Input5
Chassis StyleInverted
Mono BridgeNo
MetersTripleView™ Power Output Meter
Front PanelGlass

Weights & Dimensions

Dimensions (W x H x D)17-1/2" (44.5cm) x 9-7/16" (23.9cm) (including feet) x 21" (53.3cm) (including front panel and cables)
Weight89.5 lbs (40.6 kg)
Shipping Weight122.5 lbs (55.6 kg)

Misc. Specs

Depth (in.)21
Height (in.)9.44
Width (in.)17.5
Manufacturer Warranty3 Year
Product Weight89.5
WarningProposition 65 Warning for California Residents