Audio Multimeter

Only 2 Left!

• Measure True Amplifier Power Output
• Measure DC Voltage Drops
• Measure Common DC Voltages
• Measure Impedance of Speakers
• Measure Phase Difference

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FREE shipping to VA. Get it Wed, June 7
In Stock. Only 2 Left!
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General Features:

  • Measure True Amplifier Power output into any load reactive or resistive
  • Measure Common DC voltages
  • Measure DC voltage drops during quick transients on cable runs or battery / charging systems
  • Measure Impedance of speakers at any power or frequency from 20Hz - 1kHz (box rise)
  • Measure Phase Difference between Voltage and Current into reactive loads (Power Factor)
  • Find Tuning Frequency of subwoofer enclosures
  • Tune subwoofer enclosures for maximum power transfer
  • Measure AC Volts (amplifier output)
  • Measure AC Amps (amplifier output)
  • Measure apparent power (VA) output, Phase Angle, and Real Power (Watts) of audio amplifier, or consumption of appliances that run on AC power
  • Measure Frequency of a Sine Wave
  • Authorized Internet Dealer
  • 1-year Manufacturer's Warranty


  • DC Voltmeter: -100 Volts to +100 Volts
  • AC Voltmeter: 0 - 150 VRMS
  • AC Ammeter: 0 - 100 ARMS
  • AC Apparent Power: 0 - 15,000 VA
  • Power Factor: 50 - 100%
  • Frequency: 10 - 20,000 Hz
  • AC Impedance: 0 - 200 Ohms
  • True Power Dyno: 0 - 15,000 Watts
  • Auto-shut off timer: 8 - 10 minutes after ON button is pressed
  • Battery self-test and display of condition when AMM-1 is initialized

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Customer Ratings & Reviews

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Awesome Product

This thing is a "must have". I am SO glad that I purchased it. I have been waiting for months to get this. When it became available again I had to snatch it up...LOL. I haven't used all of it's features yet. The main thing that i wanted it for was the power reading feature and also its ability to read frequency and impedance at the same time. It's easy to operate and I also like the 9V battery status feature upon start up. No guessing if the battery is dead or any good. It lets you know from the start. I must say that for the average person who doesn't know the difference between resistive power ratings and a reactive load...they might get there feelings hurt a little bit when the AMM-1 reveals what their amplifier is actually doing. Don't think twice or hesitate about buying it. Get it while it is available.

By James on June 30, 2015 checkmarkIcon Verified purchase


found this helpful.

Worth every penny.

All The features that the AMM-1 offers, help you make your system 10 times better. From measuring the voltage drop between all your components to the actual box rise of your sub in your box. It has helped me get the most out of my system with the peace of mind that every component puts out its max clean signal. A must have for anyone serious about car audio

By EMMANUEL on June 18, 2016 checkmarkIcon Verified purchase


found this helpful.

I love this thing!!!

I have been using this for testing all sorts of audio reasons. Great for finding volt drops, tuning frequency of a box, impedance rise, and power output.

By A bass tester on December 6, 2015


found this helpful.

Quite the useful tool.

Been wanting one of these for a while to Dyno some amps I have. It's nice to be able to Dyno an amp in a real-world setting wired to a reactive load with impedance rise and less than ideal electrical to see what you're really getting. That said, this tool will break some hearts. Just like with an SPL meter, it's going to show you you're not at what you think you are.

It's pretty straightforward to use, but there are a couple things that would've been nice. The battery door doesn't seem to like to open smoothly and I just feel it's bound to break one of these days when I go to install/remove the battery. And the connector to the battery itself seems like a weak point as well.

Lastly, I kinda wish it'd have had a clamping feature so you could more easily run a wire through it.

By Brandon on June 11, 2022 checkmarkIcon Verified purchase


found this helpful.

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