Fine Tuning; Gain Adjustment; X-Over Switch; Frequencies Adjustment - MB QUART STAGE 5 Installation Manual

FINE TUNING

After you have confirmed and tested that all components are working you will tune the amplifiers. When
setting up your amplifiers you will refer to the manual inside each amplifier. However, through hundreds
of installations we have determined the following settings are ideal for the following STAGE Tuned Audio
Packages.
NOTE – Gain control, it is important to adjust each amplifier gain as described in the manual. Remember,
these settings are NOT volume controls. Gain controls, properly adjusted help properly balance the system
sound between lows, highs and minimize distortion that comes from the source unit. Listen for a clear, crisp
audio sound. The ideal gain setting should allow full volume from the source unit without audible distortion.
A
Settings
B
Level Setting
1.
2.
3.
4.
5.
The illustrations below describe the various controls. Refer to
1

GAIN Adjustment

The gain control purpose is to match
the output of your source signal to the
detailed instructions.
2

X-OVER Switch

or low frequencies. The NA2-400.2 offers
either a low pass (LP) or high pass (HP) filter.
3

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.
4
SUBSONIC Adjustment
The Subsonic Filter will cut off the
frequencies below the setting. If using
with a subwoofer, the setting should be
set between 15-25Hz.
5
BOOST Switch
The Boost Switch will increase the signal
12dB at 45Hz. Be aware this setting can
cause distortion if the gain is not set
properly.
is properly adjusted to match the signal
output level of your source unit.
THIS IS NOT A VOLUME CONTROL!
R R
INPUT FRONT
turned down (counter clockwise).
L L
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
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.
Stop increasing the source unit volume when you reach 3/4 (about 75%) or until
you hear speakers begin to slightly start producing distortion.
the level down (counter clockwise) until the distortion is eliminated. Small
Two Channel Amplifier
NA2-400.2
X-OVER
L
HP OFF LP
INPUT
LEVEL HP
R
9V 0.2V 15Hz 300Hz 50Hz 300Hz
1
3
Mono (Subwoofer) Amplifier
NA2-400.1
BOOST
L
0dB 12dB
INPUT
LEVEL LPF
R
9V 0.2V 50Hz 150Hz
1 3
GAIN
MIN
R
REAR
L
26
2
LP
3
5
SUBSONIC
15Hz 50Hz
4
MAX
X-OVER
LPF FULL
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