Help Needed: Audio Issues After Amplifier Upgrade

[mustangwestchester]

Hi everyone, I recently upgraded my 2018 Ecoboost Convertible's factory amplifier from the original FR3T-18T806-BT (9-speaker) to the FR3T-18T806-CP (12-speaker, from a GT model). Unfortunately, the audio quality has taken a major hit, and I’m hoping someone can help me troubleshoot.

The Problems:

• The new setup sounds distorted, and the overall audio quality is poor.
• Speakers are uneven: some, like the center and front speakers, are too quiet, while rear speakers are too loud (highs)
• It feels like only the back door speakers are functioning correctly (not bass wise)
• The seatbelt warning sound has changed—it now comes from the gauge instead of speakers.

Important Info:

• With the original 9-speaker amp, my aftermarket speakers sounded great.
• I’m using Forscan to adjust settings, but I’m unsure what values to modify.

Current Forscan Values:

• 783-01-01: 1000 9C
• 783-02-01: 018E
• 727-01-01: 1850 DA00 64D6
• 727-01-02: 0000 31

Any advice on how to fix the uneven audio, improve sound quality, or correct the Forscan settings would be greatly appreciated!

Thanks in advance for your help!

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[S550HPP]

Seems like no one knows other than obvious to put original back in buy an Audison Bit 8.9 cheap and HRN03 harness for plug and play swap OE location on OW bracket with a great foundation to build as funds and time are avail.

 

[mustangwestchester]

I got it, just returned the 12 speaker amp, put 9 speaker amp back, and got signals from rear speakers (Used Kicker LOC).

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