The Dayton Audio SPA100-D high-output subwoofer amplifier packs features normally found in larger amplifiers into a compact chassis, making it ideal for installation in enclosures or cabinets that cannot accommodate a larger amplifier. The Class D architecture gives it a small size while offering high efficiency and low noise.

Connectivity

1. Power supply input : Power supply on IEC connector.

2. Low level input (left/right) : Accept line level signals from a preamplifier.

3. Output cables for subwoofer : Allows the amplifier module to be connected to the subwoofer.

4. Power supply/clipping LED : This LED indicator shows the current status of the amplifier.

5. Volume (Gain) : This button allows you to adapt the input sensitivity of the amplifier to the output of the preamplifier.

6. Frequency (low pass crossover) : This button sets the highest frequency reproduced by the subwoofer, over a range of 40-200Hz with a slope of 18dB/oct.

7. Phase : This switch allows to compensate the differences between the acoustic and electrical characteristics of the subwoofer and the main speakers.

8. Auto ON/OFF : This switch enables or disables the Auto ON/OFF function. When Auto is selected, the amplifier goes into standby mode and turns on automatically when a signal is detected.

9. Bass Boost : This function adds a 6dB boost to the response at 30Hz.

10. Power button : this switch is used to power up the amplifier.