5
Introduction and Performance Features
Performance Features
•
Patented LD/HP Technology
The McIntosh Low Frequency and Midrange Loudspeaker
Elements feature the patented LD/HP Magnetic Circuit
Design. This design, when compared to conventional
Loudspeaker Elements, reduces distortion significantly. It
also increases power handling and efficiency.
•
Neodymium-Iron-Boron Alloy Magnets
The five one inch Dome Tweeters use Neodymium-Iron-
Boron Alloy that has a high flux density per unit of volume
and helps to keep the weight to a minimum.
•
Bessel Function Array
The individual tweeter amplitudes and phase relationships
of the five tweeter array are adjusted to act as a high
frequency point source
•
Shielded Magnetic Field
The XR27 may be used in Home Theater Installations near
a television receiver or monitor without causing the
television image to degrade. McIntosh has designed
special shielding around the magnetic structure of the
XR27 Loudspeaker Elements to prevent interference.
•
High Power Handling
The Loudspeaker Elements and Crossover Components of
the XR27 are all chosen for use with powerful amplifiers
up to 1,200 watts.
•
Versatile Operation and Placement
In additional to the regular connections, the XR27 Loud-
speaker System provides separate connections for Bi-Am-
plification hookups. The Crossover Network has provi-
sions to ensure the best performance when the Loud-
speaker System is mounted in a wall.
•
Gold Plated Input Connectors
The XR27 input connectors are gold plated for superior
corrosion resistance and high electrical conductivity.
Figure 6
dition of distortion to the music at low frequencies. The
Midrange and High Frequency Crossover Networks utilize
both Second and Third Order Crossover Designs. The Ca-
pacitors and Inductors used are of a high current capacity
design and include low loss (ESR) Polypropylene and
Mylar types. The Crossover Networks utilize self resetting
high current Poly-Switches to provide an extra measure of
protection.
The enclosure is an important part of the XR27 Loud-
speaker System and consists of a massive extruded alumi-
num enclosure. Refer to figure 6. The front mounting
board is
made of
3/4 inch
thick
MDF that
houses
the four 8
inch
Woofers,
one 6-1/2 inch Midrange and the five one inch inline
Tweeter Drivers. Refer to figure 7. It has multiple front to
back internal braces to form a dampened rigid Structure.
The XR27’s small footprint allows for a variety of differ-
ent placements in a room.
Figure 7