I've recently had some rear speakers from the Mark Levinson system replaced in my 07 IS250 by my local Lexus dealer. Apparantly they have replaced one of the tweeters in the rear door and the parcel shelf mids and sub due to some crackling. Before I had problems with the speakers, they sounded fantastic and the bass response was amazing even on a flat EQ. Having had the car returned with new speakers the sound is much flatter and shows less bass, particularly in the mid range. It's as if the cross over points aren't the same and that the sound is more prominent at the front. All the sound settings are set the same on the headunit.
Could anyone share any advice on how the ML kit is put together and whether there are any settings / configurations that have to be set to make it sound richer. I understand it has a ML amp in the rear powering the whole system. Is this configurable or is it simply a slot in?
My warranty ends in April so I'm keen to get this sorted before then.