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a bs o l u t e f i d e l i t y
Source Input Connections
Connect the output of your power amplifier to the High Level Input
binding posts using a high-quality loudspeaker cable. Make sure that
you have the correct polarity connected for both speakers – the plus
or positive (red) terminal on the 450XS should be connected to the
plus, positive, or red terminal on your power amplifier.
The Bass Input selector switch should be in the down position –
pointing to the inputs being used. This is the recommended hook-
up, both sonically and for convenience.
Nevertheless, you may wish to connect the bass section of the
450XS directly to your preamplifier instead. You may wish to do
this if you know that your power amplifier may be deficient in the
bass, or does not have a response flat down to 20Hz.
If you do this, use a good quality interconnect cable to connect the
output of your preamplifier to the Preamp level input RCA
connector on the back plate of the 450XS. Using this connection,
switch the Bass Input Selector to the up position. This will bypass
the high-level input from the servo amp, and take the bass input
for the built-in servo bass amplifier directly from the preamp.
Controls
The knob on the upper left marked “
Gain
”
controls the volume of the built-in bass
servo amplifier. Begin with this control at
position 7. The knob on the upper right
marked “
Low Pass
” controls how high the
woofer will play. At the extreme low of
40Hz, the woofer will play up to 40Hz, and
then begin rolling off, or reducing its volume.
The recommended beginning position for
this control is 105Hz.
The lower left knob marked “
Tweeter
” is a
volume control for the
rear
tweeter. Turning
this control clockwise will increase the level of the tweeter. This
will increase the apparent space of the soundstage. Start with
this control at the twelve o'clock position. There is about a 3 dB
range for this control.
