Sonex series tone controls, and tune-o-matic bridge
1980 Gibson Sonex owners manual - page 8
Guitars and Parts for Sale
Details of the Sonex series tone controls, the tune-o-matic bridge and it's role in adjusting the guitars action.
The tone controls on all models are of the \"treble roll off\" or \"cut\" variety. That is to say, the tonal quality of the instrument is darkened by the reduction of treble rather than the addition of bass