This is built into the K4020U MOSFET amplifier in order to display amplifier power output. The meters are mounted behind the correct scale, which is also illuminated, according to the speakers connected to the amplifier (4 or 8 ohms). When the amplifier is switched into a bridge configuration, then both meters may be connected in series.
Specifications
* stereo scale (vertical): 0.001 to 100W / 8ohm ; 0.002 to 200W / 4ohm, divided over 12 LEDs
* scale distribution with mono bridge configuration (horizontal): 0.001 to 400W / 8ohm divided over 24 LEDs
* 2 x 16 LEDs for scale illumination
* supply voltage: + and - 40V from K4020U
* dimensions: 3.1" x 2.8"
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