Boston Acoustics GT-28 - Manual (Page 13)

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Setup Tuning—Full-Range Speakers (cont.)
4) Head Unit
The head unit should have all controls such as bass, treble, balance, and fader set to the flat or centered
position. The volume control should be at the minimum setting. If the head unit has any equalization or bass
management features such as boost, they should be defeated at this time. Turn head unit on, and verify
that the GREEN status LED is lit on the amplifier.
6) Input Sensitivity Control
Slowly rotate control clockwise until maximum undistorted playing level is
heard from the speakers. Listen closely for bottoming from the speakers. If
detected, rotate INPUT SENSITIVITY control counterclockwise until it is elim-
inated.
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0 . 2
I N P U T S E N S I T I V I T Y 2 . 6
7) Crossover Controls
To achieve higher undistorted playing levels from the main speakers, the
highpass crossover must be engaged. Rotate crossover control fully clock-
wise. The highpass crossover point is now set at 350Hz. Rotate “Q” Control
fully counterclockwise. Move crossover switch to the right (ON) position.
Slowly rotate the INPUT SENSITIVITY control clockwise until maximum undis-
torted playing level is heard from the speakers. Listen closely for bottoming
from the speakers. If detected, rotate the input sensitivity control counter-
clockwise until it is eliminated. Slowly rotate the highpass crossover control
counterclockwise while listening for bottoming. You are lowering the
crossover point, which means that more bass signal is being sent to the
speakers. If bottoming is detected, rotate the INPUT SENSITIVITY control
counterclockwise until it is eliminated and/or rotate the HIGHPASS crossover
control clockwise to raise the crossover point.
H I G H PA S S
O F F O N
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3 5 0
H z 1 8 5
5) Volume
With the chosen musical track playing, turn the head unit volume control up until the maximum level of
undistorted signal is heard from the speakers. (For most head units, this will be near the end of the volume
control range.)
WARNING! A distorted signal from the head unit sent to the amplifier can cause loudspeaker failure at high-
er listening levels!