Broan SPA1900D User Manual

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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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