The VM-1 Voltage Gauge checks 60 times per second to immediately alert you to dangerous low or high voltage that can threaten your car audio gear. The VM-1 monitors the DC (Direct Current) voltage from your battery, or directly from your amplifier. The VM-1 uses a 12 bit analog-to-digital converter for near real-time precision readings.
When voltage dips too low, you’ll see a ‘Lo’ voltage warning flash. This is especially important for stock charging systems powering amplifiers requiring more than 1000 watts RMS. During voltage spikes, a “Hi” voltage warning will alert you when voltage reaches the upper limit.
The SQ VM-1 displays your voltage on a green back lit screen. The included adhesive tab also serves as a template for screw placement. Check our installation instructions for more info on the VM-1 Voltage Gauge.
FAST REFRESH 60 times per second using 12-bit analog to digital conversion (ADC)HI/LO WARNINGS: "LO" voltage warning flash at 10.0V"HI" voltage warning at 17.5V COMPACT DESIGN makes it easy to mount in clearly visible mounting location MOUNTING OPTIONS including adhesive tab, screw on, or flush mount (requires cutout in a vehicle panel) BACK-LIT DISPLAY lets you clearly read your voltage regardless of the time of day
Choose a Mounting Location
Your mounting location should:
Be visible when you're in your normal seated driving position.
Leave a clear your view of the road and your vehicle’s gauges.
Allows you to secure wires away from the vehicle’s controls to avoid any hazards while driving.
Option 1: Mark screw locations using the included adhesive pad as a template. Secure the VM-1 with screws using the (2) mounting holes located under the front cover.
Option 2: Use the included double-sided adhesive pad. Clean the back surface of the VM-1 with rubbing alcohol. Wipe dry with a lint-free cloth. Peel away the outer protective layer from one side of the adhesive pad and place it on the VM-1. Clean and dry the mounting location. Align and adhere the VM-1 to the mounting location.
Option 3: Flush mount your SQ VM-1. This advanced option involves permanently modifying the mounting location. You will need to cut an opening in an interior panel to accommodate the LCD display. Depending on the look and available space, you can secure the VM-1 however you would like. Be sure you can still reach the adjustment screw to calibrate the meter.
We recommend wiring the VM-1 directly to your car audio amplifier. To monitor battery voltage, you can wire to the battery.
The meter uses three wires.
Red is the 12V Constant wire.
Black is the 12V Ground wire.
Blue is the 12V trigger wire to operate.
Wiring to the amplifier. Connect the red wire to the positive input on your amplifier. The black wire should connect to the ground terminal, and the blue wire should connect to the remote on.
Wiring to the battery/stereo harness. Connect the red wire to the positive battery terminal. Next connect the black wire to the negative terminal. Finally, connect the blue wire to your remote turn on wire behind the dash (usually blue). The VM-1 should turn on with accessory power. For direct connection to the stereo harness, first find your vehicles harness specifications. Locate the positive, negative, and remote (accessory) wires.
NOTE: If you connect the blue wire directly to your battery, it will stay on all the time!
After you’ve installed the VM-1, read the voltage at your amplifier or battery using a digital multimeter. Remove the VM-1 front cover. Next, use a small screwdriver to turn the adjustment screw located above the LCD display under the front cover to match the reading from your Digital Multimeter.
Use a screwdriver to turn the yellow adjustment screw until the meter matches your reading of your vehicle’s voltage. Clockwise decreases the voltage. Counter clockwise increases the voltage.
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