I finally finished and uploaded a corresponding video for the AWE Touring catback, which replaced the Flowmaster American Thunder axlebacks (with stock resonator). Same driving route and identical equipment for recording and sound analysis. You can view it here:
The AWE Touring catback solved the drone problem entirely. As shown in the video the exhaust system controls the sound amplitudes at the drone resonance frequencies quite well. It practically eliminates the drone in the area 1250rpm - 1500rpm, which I consider critical with the automatic transmission.
:cheers:
