Amp not switching off

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SharkGill
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Amp not switching off

Post by SharkGill »

I‘ve fitted a powered sub into my S8. I took the RCA feeds and switched live from the 25 pin plug for the factory Bose amplifier. I tested the switched live before splicing and all was good. What’s happening now is the amp isn’t turning off even with key out. However if I unplug the RCAs or the power plug to the wired sub it switches off and remains off. I used pin 3 (AF earth) for the RCA grounds. Could this be the issue?
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Ronin
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Re: Amp not switching off

Post by Ronin »

AF is floating ground used for RDS so yes.
SharkGill
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Joined: Sat Oct 25, 2025 6:33 am
Location: Berkshire
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Re: Amp not switching off

Post by SharkGill »

I remember reading about this on how it's not a true 'ground' but couldn't remember where. My audio knowledge is pretty basic so not sure what the alternative is. Can I use the ground for the RCAs on lets say the rear speaker grounds or will that not work?
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