McIntosh XRT1K ユーザーズマニュアル

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McIntosh Acoustic Engineers have further refined the con-

cept of line source column in the XRT1K Loudspeaker to 

provide superior sound reproduction in a full range system. 

It uses the same acoustic technology found in the famous 

XRT2K Column Loudspeakers. The technology has been 

refined over the years and is now the 6th generation of the 

design and provides superior 

quality sound reproduction in a 

full range system.

The High Frequency Sec-

tion utilizes a patented Column 

Design

1

 with multiple three-

quarter inch Titanium Dome 

Tweeters and two inch Midrange 

Inverted Titanium Dome Driv-

ers. Refer to figures 1 and 2. 

Since the audio power fed 

to a column is distributed 

among all the drivers, each 

driver does not have to work 

as hard, resulting in greater 

power handling capability 

and a dramatic reduction 

in distortion. The Sound 

Waves from the Column 

produce a Cylindrical Wave 

Front with a stable symmet-

rical horizontal 

sound disper-

sion to minimize 

undesirable 

floor and ceiling 

reflections that 

could detract 

from a stable 

sound image. In 

the illustration the Loudspeaker on the left side produces a 

Cylindrical Wave Front and the Loudspeaker on the right 

side produces a conventional Spherical Wave Front. Refer 

to figure 3.

The Low Frequency Section of the System consists of 

two 10 inch Woofers. They have a large magnet assembly 

and long cone excursions with very low levels of harmonic 

distortion and frequency response down to 16Hz. Refer to 

figure 4. The Woofer also incorporates McIntosh’s Pat-

ented LD/HP

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 Magnetic Circuit Design. Finite Element 

Analysis and testing resulted in a design concept which 

utilizes a pair of aluminum shorting sleeves in the magnet-

ic circuit. Refer to figure 5. The sleeves virtually elimi-

nate the negative 

influence of the 

fluctuating voice 

coil field on the 

permanent magnet 

field. This results 

in lower distor-

tion due to more 

linear magnetic 

flux in the voice 

coil gap. Refer to 

figure 6. Ad-

ditional benefits 

are less volume 

compression due 

to improved heat 

transfer through 

the sleeves and a 

cooler operating 

voice coil. Both 

measurements, 

as well as critical 

listening, reveal 

ten times less distortion than 

previous designs. A good 

example of this low distortion 

is incredible smoothness and 

clarity in the reproduction of 

the human voice.

The Crossover Network 

used in the XRT1K Loud-

speaker System is designed 

to ensure an even frequency 

response over 

the entire au-

dible range. The 

Network utilizes 

both Second 

and Third Order 

design utilizing 

Capacitors and 

Inductors with 

high current 

capacity. Refer 

to figures 7, 8 and 9. There are two different types of low 

loss (DCR) Inductors in the network, each one chosen not 

to exhibit any core saturation even at high power levels. 

This prevents the addition of distortion to the music at any 

frequency. The Capacitors used include low loss (ESR) 

Polypropylene and Mylar types. The Network also utilizes 

Figure 2

Figure 1

Figure 4

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COLUMN Pat. No. 4,267,405                

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LD/HP Pat. No 5,151,943

Figure 6

Figure 3

Figure 5