Quote:
Originally Posted by kcriqui
I've been reading the forum for a while now and gotten some really great information. I've come across a weird problem that I've not been able to find a solution for:
I just swapped the OEM amplifier for a 6 channel amp so I could control the level of the door speakers independent of the dash speakers in my 2001 Boxster S. It's wired up and working, but there is a high pitch noise when the ignition is on, whether the engine is running or not. It varies in loudness as I move the throttle. At some throttle positions, the noise goes away completely. It's always the same frequency and still there when the engine is not running so it's not ignition noise. I'm at a loss why the throttle position sensor could cause noise in the amplifier. Anyone else ever experienced this?
|
You've got yourself a good old fashioned ground loop. Budget friendly amplifiers are notorious for them. Your interference is probably coming from your electrical connectors as opposed to the audio inputs, but it's hard to know for sure. You can buy isolators for the audio inputs but there aren't great ones out there for the power side (these filters should be hardwired into the amp). My advice would be (and I'm sure this isn't what you want to hear) is to get a better quality amp.
Sent from my POCOPHONE F1 using Tapatalk
With that being said though, the door speakers are designed to be subwooferish - the factory amp puts their output through a low pass filter. I'm not sure what would happen if you try to put full band through them, so if it's only coming from those two speakers you may have your answer there.