D’Amore Engineering Output Meter MONITOR THE OUTPUT OF YOUR AMPLIFIER. CALIBRATE WITH OUR DD-1 TO KNOW WHEN YOU ARE REACHING CLIPPING. Some might consider the OM-1 to be over-built; we think it is just right. Some features of the design are: Mil spec FR4 circuit board Regulated power supply Constant LED current and brightness regardless of battery voltage (won’t dim with your beat) 20 bright surface mount LEDs Wide operating voltage range for vehicles with modified electrical systems SPECIFICATI