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Black 3.5mm male-to-female inline ground loop isolator 40cm

JacobsParts Inc.

JacobsParts AFILTER-A 3.5mm Ground Loop Isolator 40cm

SKU CH-58CX-QWEAR

A passive 40cm in-line filter with 3.5mm connectors removes ground-loop hum and buzz between a portable source and an amplifier

  • Product typePassive in-line device
  • Key featuresEliminate ground loop humming and buzzing noise
  • Overall length40 cm
  • Product colorBlack
  • Eliminates ground-loop hum and buzz for clearer sound
  • Blocks DC current in the signal path to stop noise
  • Passive in-line design needs no power or batteries
  • 5 mm male and female connectors fit standard aux ports
  • Compact 40 cm cable keeps installation tidy

What this product does

The JacobsParts AFILTER-A is a passive in-line ground loop isolator designed to remove humming and buzzing caused by electrical interference between an audio source and an amplifier. It connects via a 3.5mm male plug on one end and a 3.5mm female jack on the other with a total cable length of 40cm.

Who benefits and who does not

Drivers or home audio users hearing noise when a phone or player is connected to an AUX input while charging will find this filter effective. It does not help if the noise originates from the source device itself or if the system requires signal amplification or digital processing.

The specification that decides fit

The filter only works with analog 3.5mm connections, so any setup using USB, Bluetooth, optical or other digital interfaces cannot use this device to solve ground loop problems.

How it compares

Measured against everything we stock in Car Audio Accessories & Wiring, at today’s prices. Recalculated every night.

Price $7.99
Cheaper than about 93% of the 2,768 comparable items (median $21.99).

Specifications

Product
Brand nameJacobsParts
Model nameAFILTER-A
Product typePassive in-line device
Product colorBlack
Size & build
Overall length40 cm

Questions about this item

Does the 40cm passive in-line filter add any audible hiss or require power when used all day?

The passive 3.5mm in-line filter operates without external power and adds no active circuitry, so it introduces no hiss or heat during continuous use.

Must the source and the amplifier each provide a 3.5mm jack for the 40cm isolator to connect?

Yes, the isolator has a 3.5mm male plug for the source and a 3.5mm female socket for the amplifier, so both devices need a 3.5mm audio port.

Will the 40cm ground loop isolator work with an older car stereo that only has a 3.5mm AUX input?

The female 3.5mm connector accepts the AUX input on older stereos, and the male plug connects to the source, so the isolator bridges the two without compatibility issues.

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