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30 Watt Stereo Audio Amplifier

30 Watt Stereo Audio Amplifier Kit

by Galak Electronics
Part No. VG-501A
Shipping Weight: 0.9 ounces (26 grams)

Enhance your audio projects with this compact and economical audio amplifier solution. Incorporating state-of-the-art bridged technology, this amp delivers up to 30 watts and a wide dynamic range with booming lows and crystal clear highs. Comes standard with a 3.5 mm stereo jack and DC input jack.

The unassembled kit includes instructions (including schematic and parts placement) and all the components to build one complete 30 Watt Stereo Audio Amplifier. A soldering iron, solder and a pair of cutters are required for assembly. Power source and audio cables are not included.

30W Stereo Audio Amplifier Kit:



30W Stereo Audio Amplifier Kit
(Built and Tested):




  • 15 Watts x 2 RMS power at 8 Ohms with a effective frequency response of 25 Hz-25 kHz.
  • Bridged outputs means higher power with lower supply voltages - will operate down to 6 VDC*.
  • High efficiency amplifier with an average power loss of only 35% at full output power.
  • Wide input supply voltage from 6 VDC to 18 VDC with a maximum supply current of 2.5A at 18 VDC.
  • Automatic "soft on" avoids damaging pops and clicks to speakers during power up.
  • Fully connectorized with speaker screw terminals, DC power input and stereo audio input.
      * To achieve maximum output power of 15W x 2 channels, a minumum of 16.5 VDC supply voltage is required. Current limited to 2 Amps per channel max.
        Total output power @ 6 VDC is 1.5 watts x 2 channels; Total output power @ 12 VDC is 8 watts x 2 channels.

       ** Included heatsink will dissipate 4W at 80C and allow 8W x 2 channels RMS. Higher output power achievable with larger heatsink or air circulation.


  • Supply Voltage: 6VDC to 18VDC @ 4 amps max
  • RMS Power: 15 watts x 2 @ 8 ohms with 16.5V supply (current limited to 2 amps per channel)
  • Frequency Response: 25 Hz - 25 kHz with less than 0.3% THD @ 5 watts per channel (< 1.5% THD @ 10 watts)
  • Input Connectors: Power In - 2.1mm barrel tip-positive and 2 solder pads; Audio in - 3.5mm stereo jack
  • Output Connectors: Left and right speakers out - screw terminals; 3.5mm spacing
  • Board Dimensions: 1.50" x 1.95" (3.8 cm x 5.0 cm)
  • Board Material: 0.062" (1.6 mm) FR-4, with green solder mask and top layer silk screen
  • Finished Weight: 0.9 ounces (26 grams)

Please feel free to contact us if you have any question about this project or any othe Galak Electronics Projects.

Copyright 2013 by Galak Electronics. All rights reserved.