F
EATURES AND BENEFITS
DC Offset Protection
This circuit protects the output of the amplifier against DC voltage. If for some reason DC
voltage is detected at the output stage, the amplifier will shut down protecting the speakers
from direct current.
Short Circuit Protection
The circuit protects the amplifier from damage due to a short found in the speakers or
wiring. If one of the speakers or its wiring comes in contact with ground, the amplifier will
shut down. To resume normal operation, correct the problem and turn the head unit off, then
back on. The amplifier will reset and play again.
Thermal Protection
To protect the amplifier circuitry against damage caused by prolonged exposure to high
temperatures, a thermal protection circuit is activated if the amplifier reaches excessively
high operating temperature. Once the thermal circuit is activated, the amplifier will shut
down to cool off. The amplifier will automatically turn back on once it cools down to a safe
operating temperature.
Power Indicator
The diagnostic L.E.D. illuminates when the amplifier is on and receiving power.
Built-in Crossover
Power and Speaker Distribution Blocks
Heavy gauge bare wire distribution blocks are provided for maximum power and signal
transfer with minimal resistance.
Bass Boost
For added low frequency performance the amplifiers are equipped with a variable *0~12 dB
bass boost @ 45Hz.
Line out (All Models)
Full range line outputs have been provided for convenient connection to additional amplifi-
ers in the system.
Power Fusing
This protects the amplifier against short circuits and excessive current.
Remote Turn-on
Automatically turns amplifier on when connected to the head unit’s remote output. The
amplifier will turn on and off with the head unit to save current consumption. This control
also operates the reset circuit for the amplifier’s protection. It must be connected with the
head unit in order to reset protection circuits.
Adjustable Input Sensitivity
Allows you to fine-tune the level matching between your source and the power amplifier.
Low Impedance Stability
BI4500.4 -2 Ohm Stereo, 4 Ohm Bridged
BI4800.4 -2 Ohm Stereo, 4 Ohm Bridged
BI1750M -1 Ohm Mono
BI3000D -1 Ohm Mono
3
4
The BI Series amplifiers feature a state of the art variable crossover. The BI1750M and
BI3000D use a 12db per octave slope to filter all unwanted high frequencies.
The BI4500.4 and BI4800.4 include both a Highpass and Lowpass filter.
The BI3000D features an internal Multi-Linking module.
