6.
Turn
the volume back down slightly.
7.
Slowly increase the gain control (clockwise). Stop when you hear a slight audio
distortion.
When the gain
is
properly set, you should achieve maximum undistorted output with
the volume turned
up
all the
way,
not half
way.
If
an
oscilloscope
is
available, monitor the output of the amplifier with the scope,
watching for clipping of the waveform. Set the gain
so
that only minor clipping occurs.
Adjusting the crossover
The APX2180, APX4360 and DPX2250 amplifiers feature fully-adjustable crossovers.
The DPX1800 and DPX11500 do not have a way to disable the low-pass 24dB slope
crossover.
1.
On
the APX2180, APX4360, and DPX2250, use the X-Over mode switch to select
either
LP
(low pass) or
HP
(high pass) or OFF for full range.
2.
Using the Frequency (Hz) selection control, select the frequency.
Setting the bass boost
1.
Initially set the bass boost control to the OFF position.
2.
Listen to a variety of music styles (for example, rock,
rap,
etc.) and switch the bass
boost control
on
until you notice
an
increase
in
low bass response.
Note:
Using the bass boost requires the amplifier
to
produce a great deal
of
additional power. Use bass boost sparingly.
If
you
hear
a
pop
caused
by
speaker
overexertion,
lower
the
bass
boost
to
prevent
damage
to
the speaker.
Final system checks
1.
Start the engine and turn
on
the source unit.
2.
After a two-second delay, slowly increase the volume control and listen to the
audio.
If
you hear any noise, static, distortion or no sound at all, check the connections
and refer to Troubleshooting. Depending on your system, the volume may become
quite loud even at moderate volume control settings. Until you get
an
"audio feel"
for the system's power, use care when adjusting the controls.
3.
Turn the balance controls to their extreme positions and listen to the results.
Audio output should match control settings (audio from the left speaker when
balance
is
left).
20
APX/DPX Amplifiers
6.
Turn
the volume back down slightly.
7.
Slowly increase the gain control (clockwise). Stop when you hear a slight audio
distortion.
When the gain
is
properly set, you should achieve maximum undistorted output with
the volume turned
up
all the
way,
not half
way.
If
an
oscilloscope
is
available, monitor the output of the amplifier with the scope,
watching for clipping of the waveform. Set the gain
so
that only minor clipping occurs.
Adjusting the crossover
The APX2180, APX4360 and DPX2250 amplifiers feature fully-adjustable crossovers.
The DPX1800 and DPX11500 do not have a way to disable the low-pass 24dB slope
crossover.
1.
On
the APX2180, APX4360, and DPX2250, use the X-Over mode switch to select
either
LP
(low pass) or
HP
(high pass) or OFF for full range.
2.
Using the Frequency (Hz) selection control, select the frequency.
Setting the bass boost
1.
Initially set the bass boost control to the OFF position.
2.
Listen to a variety of music styles (for example, rock,
rap,
etc.) and switch the bass
boost control
on
until you notice
an
increase
in
low bass response.
Note:
Using the bass boost requires the amplifier
to
produce a great deal
of
additional power. Use bass boost sparingly.
If
you
hear
a
pop
caused
by
speaker
overexertion,
lower
the
bass
boost
to
prevent
damage
to
the speaker.
Final system checks
1.
Start the engine and turn
on
the source unit.
2.
After a two-second delay, slowly increase the volume control and listen to the
audio.
If
you hear any noise, static, distortion or no sound at all, check the connections
and refer to Troubleshooting. Depending on your system, the volume may become
quite loud even at moderate volume control settings. Until you get
an
"audio feel"
for the system's power, use care when adjusting the controls.
3.
Turn the balance controls to their extreme positions and listen to the results.
Audio output should match control settings (audio from the left speaker when
balance
is
left).
20
APX/DPX Amplifiers
To Next Page
Loading...
Need help?
General
