AMPLIFIER CONTROLS AND OPERATION
1.
TONE CONTROLS The tonal quality of the signal passed through the amplifier can be
in the bass and treble regions using the internal tone controls. Although somewhat redunda
to those on the radio, these controls help correct for small equalization problems in the car
without changing the controls on the radio. This helps improve the Signal to Noise ratio of the
system since the boosted highs are done in the amplifier and not at the other end of the RCA
cables.
2.
CROSSOVER FREQUENCY SETTINGS The internal crossover frequency control setting of the
amplifier can be continuously variable within the frequency limits shown. This control operates
in both the low-pass and high-pass modes.
3. CROSSOVER FREQUENCY CONFIGURATIONS In the full-range mode
Hz) the amp
reproduces all frequencies heard by humans. With the control in the HP (high-pass) mode, only
information above the crossover frequency setting (e.g., 120
is sent to the speakers thus
assuming that an additional subwoofer amplifier exists to properly reproduce the bass
frequencies. With the control in the LP (low-pass) mode, only low frequency signals (bass)
comes out the speaker leads.
4.
INPUT GAIN CONTROLS This control matches the radio or preamp output voltage to the
amplifier’s input voltage so that full output can be achieved. Most radios provide only 0.5-l .OV
rms output at their RCA leads, so this control offers nearly any input voltage. Turning the
control clockwise effectively makes the amp play louder. Technically speaking, this is the
voltage needed on the input of the amplifier in order to drive it to full output.
5.
CHANNEL MODE SELECT SWITCH For 4 channel operation this switch should be in the
position. To bridge channels for higher power operation, this switch should be in the
position for 2x130 watts or the
position for a 3 channel combination stereo/bridged mono
operation.
6.
BASS BOOST ON/OFF This switch should be used for systems that need a more bass in the
low end. It is simply a narrow peak in the bass response which can add a nice “full” low
frequency sound without the broader frequency impact of the bass tone control.
7. DISTORTION LIMITING ON/OFF When turned on, this control enables the THD, circuit. When
switched on the circuit greatly reduces all distortion products at high levels but is electrically
transparent at all other listening levels. In the OFF (bypass) mode, the distortion limiting
feature is disabled so typically unwanted clipping harmonics pass on to the speakers.
