Pro installers ought to fix it on their dime!
Often it is a wiring problem. Lots of youtubes/info online about this issue.
Could be bad/insufficient-contact ground wire.
Could be amp is seeing wrong output impedance due to wrong speaker wiring.
Rock on , as loud as possible...
Often it is a wiring problem. Lots of youtubes/info online about this issue.
Could be bad/insufficient-contact ground wire.
Could be amp is seeing wrong output impedance due to wrong speaker wiring.
Rock on , as loud as possible...
