Hi, I've recently overhauled the audio in my mk2 facelift Focus, (Vibe slick 6.5" mids and In-phase tweeters in the front, Kenwood KFC-PS1795 co-axial speakers in the rear, Edge DBX12 twin DSP subwoofers in the boot) and I've installed an android auto head unit, but the tweeters keep clipping at a quite frankly "normal" volume and the audio isn't great quality anymore since changing the head unit. Is there any way of installing a pass filter or perhaps rewiring the front cards to give me the range of audio I had before? I can't figure out why the tweeters are suddenly giving me issues when they were absolutely perfect with the old system (Sony WX900-BT)

Any ideas or information would be useful please, thank you.

have you wired the speaker wire to the tweeters the correct way around.  as in + to +, negative to negative, otherwise you'll be out of phase and getting distortion.

Yeah, I made sure it was correct as there is clearly only one way to connect them from the crossovers (though, now you've mentioned it I might try to swap the inputs directly into the crossover) thank you

Yeah, tried swapping the polarity into the crossovers and no improvement in the sound quality, even re-cut and terminated all connections yesterday just to be sure it wasn't a bad connection somewhere.

I'd either look to see if there's a Lowpass Filter in the head unit settings (Graphic EQ) setting or, if it's a cheap Eastern head unit, a faulty head unit itself.

I think it may be an issue with power, as the speakers are all way over the top and I'm thinking they may not be receiving enough power in the first place.

There is no low or high pass on the head unit but I have adjusted the EQ bands (effectively creating a pass filter) though this doesn't completely negate the frequencies, merely limits them by a few dB. It does seem to have helped, but is only a temporary fix until I rewire the outputs through a standalone amp with in-built pass filters.

Thank you for the suggestions, I'll try to keep this updated once I've tried out the amp.

On 7/6/2024 at 9:00 AM, Bar72 said:

I'd either look to see if there's a Lowpass Filter in the head unit settings (Graphic EQ) setting or, if it's a cheap Eastern head unit, a faulty head unit itself.

Just an update, I've solved the issue now, as you've mentioned, it did turn out to be the head unit, I'm running the original set-up now, without the power amplifier and it's about right.

I did run with the amplifier for a while, though didn't see any major improvement in quality so reverted back to standard.

Thanks for the suggestions and I hope this helps someone in the future.

nice one mate, at least you got to the bottom of it..