2018 Silverado LTZ with Bose - NEED HELP with BOSE Bypass and AMP

[CybeRube2]

Hello everyone.   Need some help.   Purchased a Harness from John Adams at A.I.S that bypasses the bose amp and also provides loop back to amplify my replacement speakers using factory speaker wiring.  

 

I plugged everything in and in using my Kenwood X802-5 I can't get it to turn on reliably.  Sometimes it will work, but 90% of the time it doesn't.  I almost want to say it doesn't like the High-Level Inputs I used from the John Adams harness.  I used the Front and Rear Doors as my input sources.   It's almost as if it's not getting the necessary power to turn the amp on.  Supposedly it's supposed to turn on with the Speaker level inputs.   Another thing I noticed is the time it was working; it sounded bad.  The Factory BOSE sounded 10x better.   My speakers used are the JL Audio C-250x components with a 8" Soundwedge JL Audio sub.   I'm wondering if I should just pony up and get an AMP with DSP.    

 

Any ideas on what to check?  I'm trying to figure out if maybe its the Input sensitivity setting (or Gain) but I have no idea how to match it with the factory BOSE head unit.

 

 

[ftwhite]

Unless cost is an issue, I woukd not use line level inputs from a Bose system. Bose systems are very processed to get a certain sound from certain speakers. Mixing and matching didn’t provide good results for me. I used a Nav-TV unit that provides a flat source from the factory head unit. Sounded great. Worked 100% of the time. Used JL audio amps with Focal speakers. Ended up with an extra NavTV for 2014-2018, as well that I have been meaning to sell. 

[Brad McKenzie]

Does the amp you installed have a 1 or 2 ohm adjustment?   Seems I read the factory bose is a 2 ohm system.