Used Godin Solidac

Godin Solidac

*missing one locking tuner and tremolo arm.

This guitar is 'two-voice' best explained on the Godin website "It combines the sound of magnetic pickups (electric guitar) with a bridge transducer system for acoustic sounds. This guitar offers players the versatility of a humbucker-single-humbucker pickup configuration along with a transducer-equipped tremolo bridge. 
All of this sonic power comes in an instrument that sports the same ultra comfortable Mahogany neck found on the LGX with a Silver Leaf Maple body. Individual outputs are provided for the magnetics and the bridge, with the bridge output doubling as a mix out for both signals when used alone. There is an internal preamp voiced to provide excellent acoustic sound when used with any full range system and it produces very good acoustic tone even when plugged into a regular guitar amp."
Hence the two jack inputs (pictured) One jack blends the piezo and the guitar (which can be dialled to either the magnetic or piezo pickups with the pot). The other jack is to run directly into the magnetic pickups without the piezo.