Owner's Manual

Setup
The illustrations below describe the various controls. Refer to
the illustrati on that matches your amplifier.
G) 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.
0 X-OVER Switch
This switch will set the amplifier to have a
full frequency output or to filter out high or
low frequencies. The NA1-400.2RC offers
either a bandpass or a high pass filter.
@ Frequencies Adjustment
The Low Pass Filter will cut off the
frequencies above the setting. The High
Pass Filter will cut off the frequencies
below the setting.
© S UB SO NI C Adjustment
The Subsonic Filter will cut off the
frequencies bel ow the setting. If using
with a subwoofer the sett in should be kept
between 15-25Hz.
@ so osr Switch A
The Boost Switch will increase the signal
12dB at 45Hz. Be aware this setting can
cause distortion if the gain is not set
properly.
, -- ---- -- --- ---
NA2-400.1
I
'
e oo sr ----®
1
c:111 ~
Odl 1119 '@JI
I
I
LEVE L LPF SUBSOHK: I
® ®@ •
J'z, 7·-7-:
G5 @ © ;
'------- --- --- -
NA2-400.2RC :
~
.. . ,fl,
N -;2 -320.4 A :
1tMM := X~
L ~~
tf'Offtf' DfF
L ML LML
® ~
"~ ;,,u.
I G) I
' -- ---- ------- -
I
:~
I
I
I
:; l .,..,. ~ _ ,,- -.; ,__, I
I I
,_ ----'
This is a critical step to insure your amplifier
is properly adjusted to match the signal
output level of your source unit.
GA IN
~
. .
THIS IS NO T A VOLUME CONTROL! M IN 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 a re all set to cent er or "O" 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 pre fe rred.
Do not use radio signals for level setting. Hit pl ay 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 produ ci ng 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.