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10

Power Output

Minimum sine wave continuous average power output: 

4 Channels at 125 Watts into 8 ohm load

4 Channels at 200 Watts into 4 ohm load

3 Channels at 250 Watts into 8 ohm load

3 Channels at 300  Watts into 4 ohm load

Output Load Impedance

8 and 4 ohms 

Rated Power Band

20Hz to 20,000Hz

Total Harmonic Distortion

0.025% maximum harmonic distortion at any power 

level from 250 milliwatts to rated power, 20Hz to 

20,000Hz

Dynamic Headroom

2.5dB, 8 ohm load

3.5dB, 4 ohm load

Frequency Response

+0, -0.9dB from 20Hz to 20,000Hz

Input Sensitivity for rated output for Channels 1-3 

(8 ohm load)

5.0 Volt Balanced

2.5 Volt Unbalanced

Channels 4-7 are gain matched for seamless multi-

channel intergration

Input Sensitivity for rated output for Channels 1-3 

(4 ohm load)

3.8 Volt Balanced

1.9 Volt Unbalanced

Channels 4-7 are gain matched for seamless multi-

channel intergration

Signal To Noise Ratio (A-Weighted)

83dB (100dB below rated output)

Intermodulation Distortion

0.1% maximum, if the instantaneous peak power 

output does not exceed the rated power output for any 

combination of frequencies from 20Hz to 20,000Hz.

Wide Band Damping Factor

Greater than 85, 8 ohm Load

Greater than 45, 4 ohm Load

Input Impedance

32,000 ohms Balanced

18,000 ohms Unbalanced

Voltage Gain

25dB

Power Control Input

5-15VDC, less than 1mA

Power Control Output

12VDC, 50mA maximum total

Power Requirements

100 - 240Volts, 50/60Hz at 10 Amps

Standby: less than 0.5 watt

Overall Dimensions

Width is 17-1/2 inches (44.5cm)

Width is 19 inches (48.3cm) with Side Mount Brackets 

attached

Height is 6-1/16 inches (15.4cm) including feet

Depth is 21 inches (53.3cm) including the Front Panel 

and Cables

Weight

32.5 pounds (14.8 kg) net, 47 pounds (24.4 kg) in 

shipping carton

Shipping Carton Dimensions

Width is 26-1/2 inches (67.3cm)

Height is 11-3/4 inches (29.9cm)

Depth is 24-1/4 inches (61.6cm)

Specifications

Specifications

Summary of Contents for MI347

Page 1: ...aboratory Inc 2 Chambers Street Binghamton New York 13903 2699 Phone 607 723 3512 www mcintoshlabs com MI347 Seven Channel Power Amplifier Owner s Manual MI347 SEVEN CHANNEL POWER AMPLIFIER POWER 4 5...

Page 2: ...Intosh product contact your McIntosh Dealer who is familiar with your equipment and many other brands that may be part of your system If you or your Dealer wish additional help concerning a suspected...

Page 3: ...rs The MI347 has been engineered for Home Theater applications This is why three channels which are intended to power the Left and Right Front Speakers and the Center speaker have twice the power as t...

Page 4: ...m 17 1 16 43 3cm MI347 SEVEN CHANNEL POWER AMPLIFIER POWER MI347 SEVEN CHANNEL POWER AMPLIFIER POWER 4 5 L C R 6 7 4 5 L C R 6 7 CLASS 2 WIRING CHANNEL 7 RB CHANNEL 6 RS CHANNEL 5 LS CHANNEL 4 LB CHAN...

Page 5: ...Components check clearances on all components before proceeding Installation of Side Rack Mount Brackets When desired to install MI347 Side Rack Mounting Brackets follow the steps below for one side a...

Page 6: ...ANNEL 7 RB CHANNEL 6 RS CHANNEL 5 LS CHANNEL 4 LB CHANNEL 3 RF CHANNEL 2 C CHANNEL 1 LF MI347 SEVEN CHANNEL POWER AMPLIFIER McINTOSH LABORATORY INC BINGHAMTON NY HANDCRAFTED IN USA WITH US AND IMPORTE...

Page 7: ...tead of Balanced Connections This McIntosh MI347 Power Amplifier is designed for Loudspeakers with an impedance of 4 ohms or 8 ohms Connect a single Loudspeaker only to each Channel Output Terminals W...

Page 8: ...ation for the Channel exists Amber Indicates when maximum Power Output for the Channel has occured with prevention of Audio Clipping Red Indicates current limit or short circuit for the Channel Loudsp...

Page 9: ...Loudspeaker CHANNEL 2 Center Output Loudspeaker CHANNEL 1 Left Front Loudspeaker RED Indicates Standby Power ON MI347 SEVEN CHANNEL POWER AMPLIFIER POWER 4 5 L C R 6 7 CHANNEL 1 7 Front Panel TRI COLO...

Page 10: ...seamless multi channel intergration Signal To Noise Ratio A Weighted 83dB 100dB below rated output Intermodulation Distortion 0 1 maximum if the instantaneous peak power output does not exceed the ra...

Page 11: ...g damage Use the original shipping carton and interior parts only if they are all in good serviceable condition If a shipping carton or any of the interior part s are needed please call or write Custo...

Page 12: ...oducts is the policy of McIntosh Laboratory Incorporated who reserve the right to improve design without notice Printed in the U S A McIntosh Laboratory Inc 2 Chambers Street Binghamton NY 13903 www m...

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