Skip to product information
1 of 5


McIntosh MI347 7-Channel Digital Amplifier - Customer Trade In

McIntosh MI347 7-Channel Digital Amplifier - Customer Trade In

No reviews

Regular price £6,495.00
Regular price Sale price £6,495.00
Sale Sold out
Tax included. Shipping calculated at checkout.
  • Free Delivery
  • Demo Available
  • Trade-in Available
  • 3 year Warranty
View full details



Excellent Condition - Comes with original box.

Edge-Of-Your-Seat Audio Experience

The MI347 7-Channel Digital Amplifier is a dedicated home theater amplifier that delivers an immersive sonic experience that provides a heart-stopping, edge-of-your-seat audio experience in the comfort of your home theater. It uses highly sophisticated closed loop digital switching amplifiers that are paired with extremely robust power supplies that produce audio performance levels rarely heard in home theaters.

Meant to be heard more than seen – such as being installed in an out-of-sight A/V equipment rack, the MI347 has a simplified and understated exterior. But rest assured that the internal circuitry and components have received the full attention of the McIntosh engineers to make you feel like you are part of your favorite movies. With its rack-friendly 3U height, it can easily be installed in your A/V rack via the included rack mounting brackets (the mounting brackets are removable for non-rack installations). But the MI347 is not limited to just rack installations, as it can also be placed out in the open for all to see and enjoy.

In a home theater, the most important audio channels or speakers are the front left, front right, and center channel speaker. These are where a majority of the dialogue and the loudest and most prominent special effects resonate from. As such, the MI347 will deliver 250 Watts at 8 Ohms or 300 Watts at 4 Ohms to each of these three speakers. The MI347's other four channels are meant to drive the still important but less power-hungry surround sound speakers or ceiling speakers. To each of these four channels, the MI347 will deliver a healthy 125 Watts at 8 Ohms or 200 Watts at 4 Ohms.

A highly efficient Class D amplifier, the MI347 does not require noisy cooling fans to maintain nominal operating temperature; it also features an abundance of cooling vents on the top and sides to further assist with heat dissipation. On the front panel, multi-color LED indicators display the status of each channel. On the back, both a balanced and unbalanced input is included for each channel along with our standard 5-way speaker binding posts.

The MI347 can be used with any McIntosh home theater A/V Processor like our MX123, MX170 or rack mountable MX100. If you've got more than 7 audio channels in your home theater, such as with Dolby® Atmos or DTS:X, you can add our MI254 4-Channel Digital Amplifier or MI128 8-Channel Digital Amplifier (both rack mountable) to deliver McIntosh power to all your home theater speakers.

Other features included with the MI347:

  • Power Guard® signal overload technology that prevents overdriving and damaging your speakers
  • Sentry Monitor short-circuit protection circuit that disengages the output stage should current ever approach unsafe operating levels and then resets automatically when operating conditions return to normal
  • Power Control to automatically turn other connected McIntosh components on and off
  • Eco-friendly on/off signal sensing that turns the unit off if no input signal has been detected for a set amount of time and – perhaps more conveniently – automatically turns the MI347 on when it senses a signal from your home theater processor

The MI347 includes many McIntosh design cues including a black glass front panel, an illuminated McIntosh logo, and a familiar form factor highlighted by silver trim.



Power Output per Channel
3 Front Channels: 250 Watts into 8 Ohms or 300 Watts into 4 Ohms
Surround Channels: 125 Watts into 8 Ohms or 200 Watts into 4 Ohms
Number of Channels 7
Total Harmonic Distortion 0.03%
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 20,000Hz
Remote Power Control Yes
Multi-Channel DB25 Cable N/A
Speaker Binding Post Type Standard
Circuit Configuration Closed loop digital switching
Circuit Design Digital
Mono Bridge N/A
Mono Parallel N/A
Output Type Direct Coupled
Meters No
Meter Light Switch No
Balanced Input 7
Front Panel Glass with removable rack mounting ears
Illumination Direct LED
Chassis Style Black painted steel
BTU Rating 1500 BTU/h
Unit Dimensions (W x H x D) 17-1/2" (44.45cm) (19" (48.3cm with mounting ears)) x 6-1/16" (15.4cm) (including feet) x 21" (53.3cm) (including front panel and cables)
Unit Weight 32.5 lbs (14.8 kg)
Shipping Weight 47 lbs (24.4 kg)

Book a Demo

Book a Demo:

McIntosh MI347 7-Channel Digital Amplifier - Customer Trade In
McIntosh MI347 7-Channel Digital Amplifier - Customer Trade In

Trade in

Trade in form:

McIntosh MI347 7-Channel Digital Amplifier - Customer Trade In
McIntosh MI347 7-Channel Digital Amplifier - Customer Trade In



Delivery & Returns

Delivery & Returns

We offer FREE delivery to the mainland UK (excluding Channel Islands, Isle of Man, Isle of White, Isles of Scilly, and some of the remote Scottish Isles).

For other areas please contact us for a quote. Select items can be delivered internationally by prior agreement. Again please contact us for a quote. We will always do our best to help.

Our aim is to dispatch goods within 2 working days of an order being placed. Please allow 5 working days from the time of your order to receipt of item. If an order is expected to take longer than this our order fulfillment department will contact you to inform you of this.

Where multiple items are ordered, we will dispatch them all in one package. If you have ordered any special or customized items, or items otherwise not immediately available, we will dispatch the order when all items are available. If you have any concerns regarding this, please contact us and we will do are very best to help you.