speaker isolation

Hello,

I made a portable enclosure for a car radio that has a negative ground
but the left and right speaker outputs have isolated grounds from each
other and the chassis.

I needed to common out the (-) from the left and right speakers in
order to attach them to the common connection on the headphone jack. I
successfully connected each of the (-) outputs from the left and right
speakers using non-polarized 47 uf electrolytic capacitors and joined
the ends of the caps to the headphone jack.

All is well when the jack is floating and un mounted, but when I mount
the jack to the chassis, even though the audio output is great, I get
annoying loud "clicks" and "pops" when I wiggle the headphone
plug/jack, most likely because of the caps discharging/charging.

Other than figuring a way to physically isolate the headphone jack
from the chassis, is there a way to drain the charge using resistors,
and if so, what values do you suggest?


Thank you for your help,

Ivan
.

Relevant Pages

  • Re: speaker isolation
    ... I made a portable enclosure for a car radio that has a negative ground ... but the left and right speaker outputs have isolated grounds from each ... order to attach them to the common connection on the headphone jack. ... speakers using non-polarized 47 uf electrolytic capacitors and joined ...
    (sci.electronics.design)
  • speaker isolation
    ... I made a portable enclosure for a car radio that has a negative ground ... but the left and right speaker outputs have isolated grounds from each ... order to attach them to the common connection on the headphone jack. ... speakers using non-polarized 47 uf electrolytic capacitors and joined ...
    (sci.electronics.misc)
  • speaker isolation
    ... I made a portable enclosure for a car radio that has a negative ground ... but the left and right speaker outputs have isolated grounds from each ... order to attach them to the common connection on the headphone jack. ... speakers using non-polarized 47 uf electrolytic capacitors and joined ...
    (sci.electronics.design)
  • speaker isolation
    ... I made a portable enclosure for a car radio that has a negative ground ... but the left and right speaker outputs have isolated grounds from each ... order to attach them to the common connection on the headphone jack. ... speakers using non-polarized 47 uf electrolytic capacitors and joined ...
    (sci.electronics.design)
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