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Basshead Garage

Electric Circuit Testing Device - Wattmeter BHG-WM, Measure Wattage, Voltage, Current, PF up to 20,000+ Watts, 0-150 A Rms, 15-100 Hz, 1.3 OLED Display

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Availability: In Stock.
Fulfilled by Big Jeff Online Inc
Arrives Friday, May 1
Order within 22 hours and 11 minutes
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Features

  • Measure Phase Difference between Voltage and Current into reactive loads (PF)
  • Measure Max Amplifier Output with PEAK mode.
  • Wattage & Impedance Display
  • Voltage & Current Display
  • Apparent Power & Power Factor Display

Description

Basshead Garage Wattmeter - Measure Wattage / Impedance / Voltage BHG-WMThis listing includes:(1) BHG Wattmeter(1) 150A Current Transformer(1) 3.81mm 3-Pin Connector(2) 3.81mm 2-Pin ConnectorsIntroducing the Wattmeter by BASSHEAD Garage. This device accurately measures true amplifier power output (W), apparent power (VA), and the phase difference between voltage and current into reactive loads (PF). Capable of measuring AC volts (V), AC current (A), and maximum amplifier output in PEAK mode, this Wattmeter provides comprehensive insights into your audio system’s performance.Features:Measure True Amplifier Power output (W)Measure Apparent Power (VA)Measure Phase Difference between Voltage and Current into reactive loads (PF)Measure AC Volts (V)Measure AC Current (A)Measure Max Amplifier Output with PEAK mode.Display Modes:Wattage & ImpedanceVoltage & CurrentApparent Power & Power FactorSpecifications:AC Voltmeter: 0 - 200 V RmsAC Ammeter: 0 - 150 A RmsPower Factor: 0.50 - 1.00Max Wattage: 20,000+ WattsFrequency range: 15 - 100 HzDisplay: 1.3" OLED MonochromeConnectors: 3.81 mm Plug connectorsCase material: PETG PlasticDimensions:Height: 1.6"Width: 2.75"Depth: 1"Wiring:+ Battery Positive- Battery GroundR - Remote (Head Unit)V - Connect to Car Amplifier speaker output + & -C - Connect to the Current Transformer that goes around the positive or negative speaker wire.

Brand: Basshead Garage


Power Source: Battery Powered


Color: Black


Specification Met: Nist Traceable, Ce Marked


Manufacturer: Basshead Garage


Power Source: Battery Powered


Color: Black


Specification Met: Nist Traceable, Ce Marked


Brand Name: Basshead Garage


Model: BHG-WM


Manufacturer: Basshead Garage


Unit Count: 1.0 Count


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Friday, May 1

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

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Reviewed in the United States on April 3, 2026 by Amazon Customer
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Does exactly what you think it does. I just wish the connector parts were darker so it could blend in more.
Reviewed in the United States on March 6, 2026 by Joe B.
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Very useful tool, wish I had bought two because now I want one for my other vehicle.
Reviewed in the United States on December 8, 2025 by Life_In_Stereo
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Didn't work. It musr have been used previously.
Reviewed in the United States on November 12, 2025 by Vernon R.
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Reviewed in the United States on November 15, 2025 by JEFFREY PERKINS
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Review Image by Im very satisfied with this device!
The difference with term pro lab magnum and this BHG-WM is about 200watts. And this reading depends on the range of watts it has to read. Like the lower the reading, the higher the accuracy.
Reviewed in the United States on January 1, 2025 by Im very satisfied with this device!
    • Affordable with questionable accuracy
Review Image by Becky
Review Image by Becky
Review Image by Becky
Review Image by Becky
Review Image by Becky
Review Image by Becky
Review Image by Becky
Review Image by Becky
I purchased this from Big Jeff Audio and am using it on a true 4,000 watt plus system with a ton of electrical upgrades and modifications. For those that don't know. You can not just buy a 4,000 watt amplifier, run a dinky little power wire and ground wire and say "ya I'm pushing 4k". I'm talking about a REAL 4k amplifier not the ones you buy that say " MAX power of 4,000 watts). It takes A TON of electrical upgrades just to be able to support 4,000 watts. That's a peak amp rating of 400 to 450 amps of current. I purchased this to get a real time reading of impedance and to be honest. Im not sure if I can trust it. After researching it seems this might have an accuracy issue on systems above 1,500 to 2,000 watts and unfortunately I've not yet measured with a multi meter and amp clamp to verify. I purchased this over the more expensive SMD AMM1. When the weather improves i might compare these readings with ones manually obtained. ... show more
Reviewed in the United States on November 9, 2025 by Becky
    • Bhg-wm
Well, now I know how many watts my amp is putting out, how much voltage is going there, and how much box rise im getting.
Reviewed in the United States on November 28, 2024 by John Green

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