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Connector/Cable Information
Power Control Connector
The Power Control Output Jack sends Power On/
Off Signals (+12 Volt/0 Volt) when
another McIntosh Component is
connected. A 3.5mm stereo mini
phone plug is used for connection to
the Power Control Output.
Input Terminal Connector
When cables with spade lugs are used
for Loudspeaker Connection, the spade
lugs need an opening of at least 3/10 inch
(7.6mm).
Introduction
McIntosh Acoustic Engineers have achieved a very
high level of acoustic performance in the Asymmetri-
cal design of the XRT2.1K Left and Right Loudspeak-
er System which is based upon the last three and one-
half decades of Loudspeaker Systems. The XRT2.1K
provides superior spaciousness sound reproduction
with unusual sound stage depth in a
full range system.
The XRT2.1K utilizes Forty-Five
3/4 of an inch Alu-Magnesium Al-
loy Dome Tweeters. Refer to figure
1. There are Twenty-Eight 2 inch
Alu-Magnesium Alloy Cone Upper
Frequency Midranges. Refer to figure
2. Since the audio power is distributed
among all the drivers, each driver
does not have to work as hard, result-
ing in greater power handling capabil-
ity, dramatic reduction in distortion
and greater dynamic range.
The Low Frequency Mid-
range Driver Section of the
System consists of Two newly
Power
designed 6.5 inch Long-Throw
Control
Nanocarbon Fiber/Nomex/ Hon-
N/C
eycomb Fiber Sandwich Cone.
Ground
Refer to figure 3.
The Low Frequency Section
consists of Six 8 inch, Long-
Throw, Nanocarbon Fiber/Hon-
eycomb Fiber Sandwich Cone
Woofers.
Refer to
3/10 of an inch
figure 4.
(7.6millimeters)
The
Crossover
Network
used in the
XRT2.1K
Loud-
speaker
System is
designed
to ensure an even frequency response over the entire
audible range. The Crossover Network utilizes Ca-
pacitors and Inductors with high performance and
high current capacity. Refer to figures 5, 6 and 7.
Figure 1
The XRT2.1K uses low loss (DCR) Inductors in the
crossover network. The type of Inductor used in each
section of the crossover network has been chosen with
special metallic cores for high linearity, even at high
power levels. This prevents distortion of the music at
any frequency. The Capacitors used are a special type
with oil cores between its metal plates which handles
high power, high voltage and prevents arcing to im-
Figure 2
prove the acoustic sound quality.
The resistors used
in the crossovers have
a built-in heatsink to
maintain their resis-
tance values while at
the same time handles
high power levels.
The crossover net-
work also employs self
resetting high current
Figure 3
PTC type fuses to pro-
vide an extra measure
of protection for the
Loudspeaker Drivers.
The enclosure is
an important part of
the XRT2.1K Loud-
speaker System. It has
multiple front to back
and side to side inter-
nal braces to form a
dampened rigid Loud-
Figure 4
speaker enclosure.
The Loudspeaker's
small footprint allows
for a variety of differ-
ent placements in a
room.
Introduction
Figure 5
Figure 6
Figure 7
3
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