Helix Cap 33 Noise Supressor

My van has two big batteries as stock from the factory. One is the starter battery and the other is the accessory battery. I presume it has a fairly high output alternator to supply them. The amps, helix DSP and HU are all wired directly to the accessory battery + / -

When the lights and heated seats are on or the cooling fans kick in there's an awful alternator whine.

I'm thinking of getting a Helix 33 Cap which connects directly to the alternator + terminal and then down to the chassis earth.

Has anyone used one? Does it work? Or do you have any other suggestions?

TIA

Sent from my SM-G988B using Tapatalk

how well are the batteries grounded together?

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Originally Posted by chilly

My van has two big batteries as stock from the factory. One is the starter battery and the other is the accessory battery. I presume it has a fairly high output alternator to supply them. The amps, helix DSP and HU are all wired directly to the accessory battery + / -

When the lights and heated seats are on or the cooling fans kick in there's an awful alternator whine.

I'm thinking of getting a Helix 33 Cap which connects directly to the alternator + terminal and then down to the chassis earth.

Has anyone used one? Does it work? Or do you have any other suggestions?

TIA

Sent from my SM-G988B using Tapatalk

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I had never heard of this particular product, until the other day when I saw a video where Dan Ungaro was doing an install in a Porsche Boxster at EAS.

Jay