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8
Caution: The supplied AC Power Cord should not be
connected to the Rear Panel of the MC252
Amplifier until after the Loudspeaker Connections
have been made and the supplied protective
Terminal Connection Covers have been installed.
Failure to observe this could result in Electric
Shock.
1. For Remote Power Control, connect a power control
cable from the Control Center or Preamplifier Power
Control Out to the MC252 Power Control In.
2. Connect cables from the Unbalanced Output of a McIn-
tosh Preamplifier or Control Center to the MC252
Unbalanced Inputs.
Note: An optional hookup is to use balanced cables.
3. Prepare the Loudspeaker Hookup Cables that attach to
the MC252 Power Amplifier by choosing one of the
methods below:
Bare wire cable ends:
Carefully remove sufficient insulation from the cable
ends, refer to figures 1,
2 & 3. If the cable is
stranded, carefully twist
the strands together as
tightly as possible.
Note: If desired, the twisted ends can be tinned with
solder to keep the strands together, or attach spade
lug and/or banana connector.
Spade lug or prepared wire connection:
Insert the spade lug connector or prepared section of
the cable end into the terminal side access hole, and
tighten the terminal cap until the cable is firmly
clamped into the terminal so the wires cannot slip out.
Refer to figures 4, 5 & 6.
Banana plug connection:
Insert the banana plug into the hole at the top of the
terminal. Tighten the top portion of the terminal post
and the set screw to secure the banana plug in place.
Note: The use
of
Banana
Plugs is
for use in
the
United
States
and Canada only.
4. Connect the Loudspeaker hookup cables to the output
terminals that match the impedance of the Loudspeak-
er, being careful to observe the correct polarities. Out-
put impedance connections of 2S (ohm), 4S (ohm) and
8S (ohm) are provided. If the Loudspeaker’s imped-
ance is in-between the available connections, use the
nearest lower impedance connection.
WARNING: Loudspeaker terminals are hazardous live
and present a risk of electric shock. For
additional instruction on making
Loudspeaker Connections contact your
McIntosh Dealer or McIntosh Technical
Support.
5. Attach the supplied Terminal Connection Covers with
the four Mounting Screws (6-32 x 1/4 inch Phillips
Head) to the Rear Panel of the MC252 Amplifier. Refer
to figure 9.
Note: The illustration in figure 9 is for the purpose of
installing the Terminal Connection Covers, showing
the opening on the covers for the Loudspeaker
Cables to exit the MC252. It is not intended to show
which terminal connections to use.
6. Connect the MC252 power cord to an active AC outlet.
How to Connect in Stereo
Terminal Connection Covers
Cover Mounting
Screw Locations
Cable Openings
Figure 9
Cover Mounting
Screw Location