Stereo Amplifier User Manual

5v
.2v
.
The SOLAR series amplifiers are equipped with a built-in variable crossover network
allowing you to select the crossover type (i.e. Low-Pass or High-Pass) and the desired
crossover point. For example if you wish to drive a pair of subwoofers, you can select the
“Low Pass” setting on the amplifier to filter out high frequencies. This will send only low
frequencies to your subwoofers (see example settings below). The crossover point
should be determined by the speakers operating range. Please refer to speaker
manufactures recommended crossover point.
ADJUSTING THE CROSSOVER AND BASS
Fine tune the amplifier's input sensitivity.
The input gain sensitivity control for the “Solar Series”
amplifier is located on the side panel. This gain control
has been included to allow adjustment to properly
match the output of the radio. This is one of the most
misunderstood adjustments. By rotating the control in
the clockwise direction, the amplifier‘s input will
become more sensitive and the music will play louder. This
is not a volume control and you will not get more power out of the amplifier in the
maximum position! It may seem to deliver more output, but actually the system is only
playing louder faster as you turn the volume control on the radio. Ideally, to properly level
match the system the goal is to achieve maximum output from the amplifier without
distortion at about 3/4 of the volume control.
To determine if the amplifier’s gain is set properly, turn the system on and slowly increase
the volume control. You should be able to use about 3/4 volume before the system gets
loud but not distorting. It is very important when making these adjustments that you do
not over drive the speakers (at point of distortion) this will cause permanent damage to
the speakers. If you are unable to achieve 3/4 volume before distortion you will need to
adjust gain control (in this case you would reduce the gain). The gain controls should be
adjusted very slowly. It may help to have another person to assist you by adjusting the
gain controls while you listen for distortion.
FINE TUNE THE SYSTEM
16
R
L
LEVEL
input
output
line
5v
.2v
BASS
0dB
12dB
EQ
60Hz
1.2KHz
HPF
30Hz
LPF
250Hz
X-over
full hpf
lpf
+ - GND - +
HI
INPUT
MONO
STEREO
Mode
In this example we have selected
LPF (Low Pass Filter) for our XOVER.
Adjust the L
to desired crossover point for your speakers
PF (Low Pass Frequency)
Bass Boost @ 45Hz
0 ~ 12dB