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LF Audio

High Precision Voltmeter (HPVM)

High Precision Voltmeter (HPVM)

Meet the HPVM (High Precision Voltmeter) - the most precise, fastest sampling, smart wireless graphing voltmeter designed for both automotive and car audio enthusiasts.

Voltage, whether you're using it to create a spark to create combustion, inverting it to drive an electric motor, or pushing it into your amplifier to move a speaker cone to create sound, is critical in your car. Low voltage creates heat, stresses components, limits output, can affect sound quality, and even leave you stranded (if you don't have enough of it).  Make sure your voltage is always on point with the best tool for the job!

The HPVM is a high-precision wireless graphing voltmeter with 99.99% accuracy / up to 3 decimal places of precision (e.g., 15.234v), and can monitor up to 2 individual voltage points! See the voltage sag between your alternator, front battery, lithium bank, and/or your amp to ensure your electrical resistance is dialed in and on point!

It is physically overbuilt with a solid aluminum case, high-density/temperature internal supports, and gold-plated ENIG PCB to survive the loudest and most violent builds.  

Onboard AuralSync™ technology lets you connect the voltmeter to your smartphone, our AuralSync Companion Smartwatch, and other LF Audio AuralSync™ enabled devices.

For instructions on connecting your HPVM, updating firmware, using the app, and more, please see our getting started page.


Supply Voltage 4v-18v
Individual Voltage Monitoring Points 2

Voltage Measurement Range

Accuracy 99.99% accurate (+/- 0.002v)
Precision 1mV - 3 decimal places (e.g. 15.234v)
Sample Rate 330 samples per second per channel, 660 maximum SPS in dual channel
Display 1.3" diagonal TFT HD IPS LCD - 240x240 pixels /  65k color
Visual Refresh rate 33 FPS
Size 40mm x 73mm x 26mm -1.6" x 2.87" x 1"
Weight 2.3oz
Settings Use our LF Audio AuralSync smartphone app or AuralSync Companion smartwatch to change settings on the unit.
Over The Air (OTA) firmware updates

Use our LF Audio AuralSync™ smartphone app to check for and apply firmware updates



Regular price $199.00 USD
Regular price Sale price $199.00 USD
Sale Sold out
Voltage Range

Customer Reviews

Based on 34 reviews
D.C. (Cookeville, United States)
Best voltage meter on the planet

I just received this package in the mail got it installed and I'm in love this thing is so accurate and reads so fast 10 times faster than the leading competition I've done the research and it's actually helping me learn about my cars voltage and the difference between batteries etc. this thing is amazing and well surpassed my expectations can't wait for the wireless system controller to drop


Super impressed with the product heavy duty metal housing, super accurate reading, multiple displays with a dual read function to measure two different locations within your system hands down BEST voltage meter on the market can't wait for the other products to be in stock

Anthony Barajas (Houston, United States)

Great screen, great quality and accurate as heck

Bass Dad (Birmingham, United States)

It’s been great so good I used it for the voltage display in my amp dyno build. YouTube video placeholder
Douglas Dustmann (Houston, United States)
Works better than ever with software updates to improve and add features.

So nice that they can improve the product with updates. I get new options and features that I did get when I first installed the volt meter.

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