McIntosh XRT2.1K, Owner'S Manual

Page: 14 / 20

14
Caution: Do not connect the AC Power Cord to the
Power Amplifiers Rear Panel until after the
Loudspeaker Connections are made. Failure to
observe this could result in Electric Shock.
The connection instructions below, together with the
XRT2.1K Connection Diagram located on the separate
folded sheet “ Mc2C ”, is an example of a typical audio
system. Your system may vary from this, however the
actual components would be connected in a similar
manner.
Note: When multiple Power Amplifiers are used to
drive the various sections of the XRT2.1K, it is
important that each of the amplifiers utilized
have the same amplifier gain values.
Power Control Connection:
1. For Remote Power Control, connect a power control
cable from the Audio Preamplifier or A/V Control
Center Power Control Output 1 (TRIG 1) to the
Room Correction Equalizer POWER CONTROL
IN.
2. Connect a power control cable from the Room Cor-
rection Equalizer POWER CONTROL
OUT to Power Amplifier A POWER
CONTROL IN.
3. Connect a power control cable from the
Power Amplifier A POWER CON-
TROL OUT to Power Amplifier B
POWER CONTROL IN.
4. Connect a power control cable from Power Ampli-
fier B POWER CONTROL OUT to Power Ampli-
fier C POWER CONTROL IN.
5. Connect a power control cable from Power Ampli-
fier C POWER CONTROL OUT the XRT2.1K
POWER CONTROL IN. Refer to figure 22.
6. Connect a power control cable from the XRT2.1K
POWER CONTROL OUT to the next XRT2.1K
POWER CONTROL IN.
Audio XLR Cable Connection:
1. Connect an XLR cable from the Balanced Output
1 Left Channel of an Audio Preamplifier to Power
Amplifier A BALANCED IN. Place the INPUT
MODE Switch in the BALanced Position.
2. Connect an XLR cable from Power Amplifier A
BALANCED OUT to Power Amplifier B, BAL-
anced IN. Place the INPUT MODE Switch in the
BALanced Position.
3. Connect an XLR cable from Power Amplifier B
BALanced OUT to Power Amplifier C, BALanced
IN. Place the INPUT MODE Switch in the BAL-
anced Position.
Loudspeaker Input Terminals:
When connecting the Loudspeaker Hookup Cables
to the XRT2.1K Loudspeaker Input Terminals please
follow the steps below:
1. Rotate the end of the Input Terminal Post counter-
clockwise until an opening ap-
pears. Refer to figures A and B.
2. Insert the Loudspeaker hookup
cable into the Input Terminal
Post opening or the cable spade
lug around the center post of
the Input Terminal. Refer to
figure C.
3. Rotate the end of the Input Ter-
minal Post clockwise until it is
finger tight. Refer to figure D.
4. Place the supplied McIntosh
Wrench over the end of the
Input Terminal and rotate it one quarter of a turn
(90° ) to secure the Loud-
speaker Cable Connection.
Do not over tighten.
Refer to figure E.
Preparing the Loudspeaker Hookup Cables:
When connecting a XRT2.1K Loudspeaker to an
amplifier, it is very important to use cables of ad-
equate size, so there is little to no power loss in the
cables. The size is specified in Gauge Numbers or
AWG (American Wire Gauge). The smaller the Gauge
number, the larger the wire size:
Loudspeaker Cable Distance vs Wire Gauge Guide
Loudspeaker
Impedance
25 feet
(7.62 meters)
or less
50 feet
(15.24 me-
ters)
or less
100 feet
(30.48 meters)
or less
8 Ohms 16AWG 14AWG 12AWG
Bare wire cable ends:
Carefully remove sufficient insulation from the cable
ends, refer to figures
23, 24 & 25. If the
cable is stranded,
carefully twist the
strands together as tightly as possible.
Notes: 1. If desired, the twisted ends can be tinned
with solder to keep the strands together.
2. The prepared bare wire cable ends may be
inserted into spade lug connectors.
3. Banana plugs are for use in the United
States and Canada only.
Banana Plugs for cable ends:
1. Attach the previously prepared bare wire cable
ends into the banana plugs and secure the connec-
Figure 23 Figure 24 Figure 25
Figure A
Opening
Figure B
Figure C Figure D
Figure E
Power
Control
IN OUT
Figure 22
How to Connect with Three Power Ampli-
fiers