Hi All,   I have some thoughts in my head about upgrading the subwoofer in my S3 ( I have the Canton fitted - but want to have more solid BASS ). I searched in the threads - but could not find anything. For Octavia 2/3 - there are good solutions for subwoofer boxes like  www.basser.pl but i cannot find anything like this ready for Superb 3. Does someone knows some solutions or guides for mounting the new speaker in the left part of the trunk - at the place of the factory one ? I will o