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Installation
Prepare the Speaker Wire
•
If speaker wire is not already terminated,
remove ½ inch (12.7 mm) of insulation from
the wire end and twist the strands together. For
runs under 25 feet, use at least 16AWG wire.
For runs under 50 feet use at least 14AWG, and
for longer runs up to 100 feet, use 12AWG.
12AWG, being the larger wire, can be used
in all the above cases if desired. The above
guidelines are for 8 Ohm connections. The
XRT1.1K is an 8 Ohm speaker, but, for
reference purposes, when using 4 Ohm speaker
connections, subtract 2 from the gauge. For
2 Ohms subtract 4. For example, a minimum
gauge for a 50 foot 2 ohm run would be
10AWG.
•
When using a very powerful amp with output
of 1000 watts or more, it is best to use thicker
speaker wire of at least 12AWG in all cases.
Loudspeaker Input
Terminal Connection
When connecting the
speaker wire to the XRT1�1K
Loudspeaker Input Terminals,
please follow these steps:
1� Rotate the end of the
Input Terminal Post
counterclockwise until an
opening appears. Refer to
Figure 3.
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 3 again.
3� Rotate the end of the Input Terminal Post
clockwise until it is finger tight.
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 Loudspeaker cable
connection. Do not over tighten. (Figure 4
The patented, gold-plated Solid Cinch™ speaker
binding posts will also accept banana plug
connections. Push the banana plug into the opening
at the top of the binding post.
Single Amplifier Connection
The XRT1.1K has three pairs of Input Terminals
labeled SUBWOOFER, LOW and MID/HIGH.
If a single amplifier is to be used to power the
XRT1.1K, connect the single amplifier to one pair
of Input Terminals and the supplied Jumper Cables
(Figure 5) can be used to connect the remaining
two pairs of Input Terminals. Attach the Spade
Terminals of the Jumper Cables as described above
in Loudspeaker Input Terminal Connection. Use
Jumpers to connect Negative Terminals to Negative
Terminals and Positive to Positive. In the end, the
pair of Input Terminals with the amplifier connected
should be daisy chained to the remaining terminals
that do not have an amplifier attached. Be careful to
observe correct polarity. Never connect an input
Opening
pair with an amplifier attached to another pair
Figure 3– Opening
with another amplifier attached.
Input Terminal
Figure 4– Tightening
Input Post
)
Figure 5– Jumper Cable
Multiple Amplifier Connections
The XRT1.1K Speaker can be powered by up to
three separate power amplifiers. To use three power
amplifiers, follow the instructions "Loudspeaker
Input Terminal Connection" above for each pair
of cables from each power amplifier to each of the
three pairs of terminals on the XRT1.1K (MID/
HIGH, LOW and SUBWOOFER). Do not use
jumper cables, and always take care to observe
proper polarity.
To power the XRT1.1K with two amplifiers, connect
each power amp to a separate pair of terminals.
Use a pair of jumper cables to connect the shared
terminals. Typically, one amplifier would power
the SUBWOOFER, and the MID/HIGH and LOW
terminals would be powered by a separate power
amplifier with jumpers connecting the pairs. It does
not matter which pair of the jumpered terminals you
choose to connect to the Power Amplifier.
Less Resistance
The XRT1.1K is an 8 Ohm speaker, and this is
the recommended connection from an amplifier.
Some people will use a 4 Ohm connection from an
amplifier as a kind of equalization. For instance,
using a 4 Ohm connection on the MID/HIGH will
result in a 3db drop in that range. Bass can be
lowered in the same manner for use in a boomy
room. If this is something you wish to play around
with, just remember to NEVER use a higher Ohm
output of an amplifier such as 16 Ohm. This will
result in heat generation beyond the amplifier's
design.
Making It Glow
To illuminate the McIntosh name plate, power needs
to be connected to the XRT1.1K. Using a power
control connection cable, connect the Power Control
Out of a McIntosh component to the Power Control
5
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