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
The “Speed Series” amplifiers include a built-in variable crossovers. The crossover features
a variable frequency selection for precise low pass filtering for the SPA1000D, SPA1300D ,
SPA1600D and SPA1900D. The SPA90.2 , SPA90.4 and SPA150.4 also offer the same
frequency selection with the option of low or high pass filtering.
Power and Speaker Distribution Blocks
Heavy gauge bare wire distribution blocks are provided for maximum power and signal
transfer with minimal resistance.
Bass Boost (SPA1000D SPA1300D SPA1600D SPA1900D)
For added low frequency performance the amplifiers are equipped with a variable *0~18 dB
bass boost @ 45Hz.
Line out
Full range line outputs have been provided for convenient connection to additional amplifi-
ers in the system. The outputs are buffered to reduce signal loss. Please note that the
amplifier’s input level adjusts these level outputs.
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
SPA1000D -1 Ohm Mono
SPA1300D -1 Ohm Mono
SPA1600D -1 Ohm Mono
SPA1900D -1 Ohm Mono
SPA90.2 -2 Ohm Stereo, 4 Ohm Bridged
SPA90.4 -2 Ohm Stereo, 4 Ohm Bridged
SPA150.4 -2 Ohm Stereo, 4 Ohm Bridged
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