Boston Acoustics GT-40 - Manual (Page 13)

13
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) FRONT 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 detect-
ed, rotate FRONT Input Sensitivity counterclockwise until it is eliminated.
7) FRONT Crossover Controls
To achieve higher undistorted playing levels from the front speakers, the FRONT
crossover must be engaged. Rotate crossover control fully clockwise. The high-
pass crossover point is now set at 350Hz. Rotate FRONT “Q” Control fully coun-
terclockwise. Move crossover switch to the right (ON) position.
Slowly rotate FRONT 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 FRONT input sensitivity control counter-
clockwise until it is eliminated. Slowly rotate FRONT highpass crossover con-
trol 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 detect-
ed, Rotate FRONT input sensitivity control counterclockwise until it is eliminated and/or rotate the FRONT
highpass crossover control clockwise to raise the crossover point.
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!
GT-40_manual 4/10/03 4:17 PM Page 13