McIntosh MC275 Connection Diagrams

1A McIntosh Laboratory, Inc. 2 Chambers Street Binghamton, New York 13903-2699 Phone: 607-723-3512 www.mcintoshlabs.com Part No. 04131300 Audio Preamplifier Note: Refer to the MC275 Owner’s Manual page 10 for additional connection information. Connection Legend: Data Cable*- Digital Signal Cable - Sensor/Keypad Cable - Network/RS232 Cable - Power Control Cable* - Ground Wire - Audio Signal Cable - AC Power Cords - Video Signal Cable - Loudspeaker Cable - RF Signal Cable - * 2 conductor shielded with 1/8 inch stereo mini phone plug on each end. Connect to AC Outlet Right Loudspeaker System Left Loudspeaker System (-) (+)8Ω (-) (+)8Ω (+)8Ω (-) (+)8Ω (-)

1B McIntosh Laboratory, Inc. 2 Chambers Street Binghamton, New York 13903-2699 Phone: 607-723-3512 www.mcintoshlabs.com Note: Refer to the MC275 Owner’s Manual page 12 for additional connection information. Connection Legend: Data Cable*- Digital Signal Cable - Sensor/Keypad Cable - Network/RS232 Cable - Power Control Cable* - Ground Wire - Audio Signal Cable - AC Power Cords - Video Signal Cable - Loudspeaker Cable - RF Signal Cable - * 2 conductor shielded with 1/8 inch stereo mini phone plug on each end. Audio Preamplifier Connect to AC Outlet Loudspeaker System JUMPER BAR1 (-) (-) (+)16Ω (+)16Ω To second MC275 1NOTE: When the Mode Switch is set to MONO, the supplied Jumper Bars are used to connect the output of the Left and Right Amplifier Chan- nels in parallel. The effective output imped- ance of the MC275 Power Amplifier is now 8Ω, even though the physical connections are made to the 16Ω terminals. The 8Ω terminals would be paralleled when a 4Ω Loudpeaker is connected to the MC275 (operating in MONO Mode). Likewise the 4Ω terminals would be paralleled when a 2Ω Loudpeaker is connected to the MC275 (oper- ating in MONO Mode). 16 16 JUMPER BAR1 JUMPER BARS1 (-) (+)8Ω