The Dayton Audio SPA300-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

USB Power output : 5V 500mA via USB-A. This output provides power supply when the amplifier is switched on or in standby.

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

Output cables for subwoofer : Connect the amplifier module to the subwoofer.

Power input : Power supply on IEC connector.

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

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

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

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

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.

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

Supply voltage selector : This switch allows you to select the power supply voltage of the amplifier, depending on the voltage delivered by your electrical network.