Self powered subwoofers are lighter and more portable than installed systems.
The self powered subwoofer can be a great tool for the small venue owner because of its portability and economical price. They are very popular among deejays who bring their own equipment to gigs. These subs use built in power amps to drive their speakers, eliminating the need for long runs of audio cables to carry the signal from the amplifier to the speakers. Powered subs will also act as a crossover point for your audio signal. This allows you to send only higher frequencies to your top speakers. JBL produces a popular line of powered speakers including self powered subwoofers.
Instructions
1. Plug the female end of your XLR cable into the male XLR output of your audio mixer. The XLR connection has the three pins that form a triangle. The female end has three holes that match the same triangle shape.
2. Plug the male end of your XLR cable into the female XLR connection on the back of your powered subwoofer that is labeled "sub input." The subwoofer will act as a crossover point and only play the low end of the music while it sends the rest of the frequency range up to your top boxes.
3. Adjust the crossover frequency knob located on the back of your powered sub. This allows you to select the point in the frequency range where the sub will begin to send the audio signal to your top speakers. Normal ranges for live audio applications are 60 Hertz to 120 Hertz.
4. Plug the female end of your other XLR cable into the "audio output" connection on the back of your subwoofer.
5. Plug the male end of your cable into the "audio input" connection in your top box. This will allow you to hear the full range of the music instead of just the low end.
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