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Black rectangular plastic speaker polarity tester FH-168 with test button and indicator lights

Shenzhen Aimilai Technology Co.Ltd.

Shenzhen Aimilai Technology Co.Ltd. FH-168 Speaker Polarity Tester

SKU CH-55T2-HGKMC

Tests speaker polarity across treble, door and subwoofer drivers with LED phase indication

  • TypeSpeaker Wire
  • Safely troubleshoot car audio systems with a dedicated phase meter
  • Test every speaker type from tweeters to subwoofers in one tool
  • Verify left and right channel wiring using built-in test signals
  • Confirm correct speaker polarity through a clear four-light LED pattern
  • Compact plastic housing measures 108 x 70 x 25 mm for easy storage

Speaker Polarity Tester FH-168

The FH-168 is a handheld phase meter designed to verify speaker wiring polarity in car audio systems. It connects to speaker wire and uses visual indicators to confirm correct or reversed connections across various driver types.

Installers verifying wiring polarity

This tool suits installers and enthusiasts who need to confirm positive or negative phase on tweeters, door speakers or subwoofers. It is not for users who require impedance measurement, signal generation beyond the fixed test tone or automated logging of results.

Phase detection via LED pattern

Pressing the test button while the unit plays a fixed frequency causes three green flashes and one red for correct polarity or three red flashes and one green for reversed polarity, giving an immediate pass or fail indication.

Highlights

  • Safely troubleshoot car audio systems with a dedicated phase meter
  • Test every speaker type from tweeters to subwoofers in one tool
  • Verify left and right channel wiring using built-in test signals
  • Confirm correct speaker polarity through a clear four-light LED pattern
  • Compact plastic housing measures 108 x 70 x 25 mm for easy storage

Specifications

TypeSpeaker Wire

Questions about this item

How do I connect the FH-168 tester to a car speaker wire to check polarity?

Connect the tester leads to the speaker terminals, play a test tone from sections three or four, then press the test button; three green flashes plus one red means positive phase, three red plus one green means reversed.

What part of the FH-168 will need replacement first with regular use?

The 9 V battery powering the unit will need replacement before any other component.

What limits how long I can run the FH-168 continuously during an install?

Battery drain is the first limit; extended testing sessions will exhaust the 9 V cell and stop the indicator lights.

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