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Stereo Audio Power Meter

Stereo Audio Power Meter Kit

by Galak Electronics
Part No. VG-502
Shipping Weight: 0.8 ounces (23 grams)

Enhance your audio projects with this economical solution for visualizing peak output power. Designed with a high speed multiplexer for efficiency, the Stereo Audio Power Meter can be configured for 4, 8 and 16 Ohm speakers and different maximum power levels.

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

Stereo Audio Power Meter Kit:



Stereo Audio Power Meter Kit
(Built and Tested):




  • User selectable impedance for 4, 8 or 16 Ohm speaker systems.
  • Multiplexed stereo inputs for simplified and compact design.        
  • Easy parallel connection to speakers - meaning no special connections or integration for existing systems
  • Wide input supply voltage from 12 to 18 VDC and a maximum supply current of only 130mA with all LED segments lit.
  • Large multicolored dual bargraph displays with 7 green, 1 yellow and 2 red rectangular LEDS.
  • Displays can be easily mounted on the back of the PC board for low profile configurations.


  • Supply Voltage: 12VDC to 18VDC @ 150mA
  • Power Scale: Logaritmic, 0.2W to 100W peak power (50 dBm)
  • Board Dimensions: 3.00" x 1.95" (7.60 cm x 5.0 cm)
  • Board Material: 0.062" (1.6 mm) FR-4, with black solder mask and top layer silk screen
  • Finished Weight: 0.8 ounces (23 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.