B. Release latch on socket (lever up-release, Lever down-lock).
C. Carefully insert network.
D. Lock the network in the socket. NOTE: CHECK TO SEE THAT THE "STEREO
- MONO" SWITCH IS IN THE CORRECT POSITION.
E. Access plate can now be replaced.
SYSTEM ADJUSTMENT/USE
- Recheck all wiring and connections and apply
power to system. Set all tone controls to "flat" (no cut or boost) position and
adjust volume to a comfortable level. Select a variety of program material,
preferably music that you know to be fairly accurate and containing deep bass as
well as high treble passages.
Increase volume of music source to approximately 3/4 of maximum. Adjust
variable gain on bass amplifier slowly clockwise just to the point where audible
distortion becomes noticeable, then turn gain control counterclockwise slightly.
Adjust the gain control on the midrange amplifier until you obtain balance to the
bass tones. Follow the same procedure for adjusting the gain of the treble
amplifier. Proper tonal balance will require some careful listening and
readjustment.
Volume can then be controlled by the music source volume control.
CROSSOVER FREQUENCY SELECTION
Selection of the proper crossover frequency depends on the driver selected and
the way in which they are used. For subwoofer operation, crossover frequencies
between 80 and 150 Hertz are generally preferred. For use between separate
drivers of a two or three way system, there is much more variance in the potential
choice of crossover frequencies. If a tweeter, say, has a response of 1200 to
22,000 Hertz, and a woofer a response of 28 to 2400 Hertz, the overlap area
would be between 1200 and 2400 Hertz (the tweeter's lower end and the
woofer's upper end). The difference between these two frequencies is ONE
octave. (Octaves are logarithmic, meaning that each octave is double the
frequency in Hertz of the previous octave. So, if 20 to 40 Hertz is the first octave,
then 40 to 80 Hertz is the second octave.) The proper crossover choice is usually
about half of the octave difference of the overlap area. In the case above, since
the overlap area is one octave, the crossover point would be at one half octave,
or 1800 Hertz.
© 2008 Linear Power, Inc. - ALL RIGHTS RESERVED
LINEAR POWER™ is a trademark of Linear Power, Inc.
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