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© 1999 Directed Electronics, Inc
1. RCA INPUT JACKS - accepts line-
level outputs from head units or
signal sources at voltages from
200 mV to 8 volts. High-grade
shielded or twisted pair RCA cables
are recommended for this input.
2. GAIN ADJUSTMENT - controls the
gain (input sensitivity) of the
amplifier. Each control sets the gain
for that half of the amplifier.
3. CROSSOVER SELECTION SWITCH -
controls the type of filter for each
of two on-board active crossovers.
LPF setting is used for low-pass
(subwoofer) output frequencies,
HPF is used for high-pass (mid-
bass/midrange) outputs. The FLAT
setting is used for full-range or
mixed stereo/mono applications.
4. BASS EQ - (model 500 only) these
switches activate an 8 dB bass
boost circuit. Use as necessary for
low frequency enhancement.
5. CROSSOVER FREQUENCY - controls
the frequency range of the ampli-
fier. Each half of the amplifier can
be set independently for optimum
performance.
6. LED INDICATOR - the green Power
LED lights to indicate normal opera-
tion. The green LED will shut off to
indicate amp shutdown due to
short circuit, DC offset, or over-
current conditions detected by on-
board protection circuits. Thermal
protection is also indicated by the
green LED shutting off.
AMPLIFIER CONTROLS
Refer to Figure 2 for details.
FIGURE 2—AMPLIFIER CONTROLS