Setup
The illustrations below describe the various controls. Refer to
the illustration that matches your amplifier.
(D
GAIN Adjustment
The gain control purpose is to match
the output
of
your
source signal to the
amplifier. Refer to the section B below for
detailed instructions.
@x-OVER
Switch
This switch will set the amplifierto have
a full frequency output or
to
filter out high
or
low frequencies. The NA1-400.2 offers
either a bandpass
or
a high pass filter.
@Frequencies Adjustment
The Low Pass Filter will cut offthe
frequencies above the setting. The High
Pass Filter will cut offthe frequencies
below the setting.
©SUBSONIC Adjustment
The Subsonic Filter will cut
off
the
frequencies below the setting.
If
using
with a subwooferthe settin should be kept
between 15-25Hz.
@BOOST Switch A
The Boost Switch will increase the signal
12dB
at
45Hz. Be aware this setting can
cause distortion ifthe gain is not set
properly.
NA
2-
400.1 ® :
BOOST____.--.:::-,
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NA2-320.4
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IH'IJT
This is a critical step to insure your amplifier
is properly adjusted
to
match the signal
output level
of
your source unit.
GAIN
. .
THIS
IS
NOT A VOLUME CONTROL! MIN
MAX
1. If possible, with the source unit off, confirm that the primary volume control is
turned down (counter clockwise).
2. Turn on the source unit (CD, or MP3 player). Re-confirm that the volume is
turned down. Make sure the source unit controls; balance, fader, bass and
treble are all set to center
or
"0" adjustment. Make sure that the green LED on
the end
of
the amplifier is illuminated.
3. Play a clean musical selection of which you are very familiar. CD is preferred.
Do not use radio signals for level setting. Hit play and start turning the volume
of
the source unit up.
4. Stop increasing the source unit volume when you reach 3/4 (about 75%) or until
you hear speakers begin to slightly start producing distortion.
5. Increase the amplifier gain (clockwise) until distortion is heard, then back
the level down (counter clockwise) until the distortion is eliminated. Small
adjustments may need to be made to balance the levels of multiple amplifiers.
