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      06-29-2022, 06:05 PM   #1
rebrabneb
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Drives: BMW E90 330d
Join Date: Nov 2021
Location: UK

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New DSP Amp… now no sound?

Hi all,

First post from a place of frustration.

Got a base audio 335d E91. Bought a Helix Match PP62DSP with a plug n play kit from an eBay store, but can’t for the life of me get the speakers to play any sound.

It came with a quad lock head unit connector, and everything wired up fine. The amp lights work as they should, but my car then drops any internal sound like washer fluid, warning sounds, etc etc. The only sound I have is if the lights are left on (the not as loud gong). IDrive works fine, just no sound from anything.

I’ve wired it into the factory harness as the amp takes power from there and that’s how the PnP kit should work.

When I revert it all back to normal the speakers work again. I have tried the MOST BUS connector in any available slots and nothing fired up.

Any suggestions where to begin looking?
Appreciate 0