I did a demo of the two signal paths some time ago (whilst I still had the single TRS output - here EpiphoneLesPaulMods. The battery by the way is attached to the inside of the control cover plate using an advanced method - a bit of electrical tape. The Bridge piezo goes strait to a preamp with volume only and out of it's own socket. So for normal use I still had individual volumes for the Neck and Bridge pickup but with a shared tone (means rewiring the tone circuit AFTER the switch). I could use a TRS socket for the acoustic out and thus only drain the battery when I wanted the acoustic feature. But this way the Acoustic out was on a separate circuit. I drilled another socket hole adjacent to the existing one. 4 string/ 5 string loaded HIPSHOT A STYLE BRIDGE. Play the impossible View all piezo Bass Bridges for ghost pickup systems at Graph Tech Guitar Labs. So in the end I settled for the cruellest option. View all piezo Bass Bridges for ghost pickup systems at Graph Tech Guitar Labs. Also it meant having a dedicated switch box on the floor to receive the TRS cable and farm out the 2 signals. A word of warning here- I was forever leaving the switch on and when I went to gigs the battery was flat. I used a psh pull pot to replace one of the volume pots for this purpose this avoiding another unnecessary hole in the bodywork. Consequently the only option if you use a TRS out is to fit a second switch to act as battery off/on for the Preamp. the tip and sleeve as per normal but the ring is what connects the earth of the battery to the earth of the guitar and thus acts as a power switch. You have to use a TRS for the acoustic alone. I too figured a TRS out would suffice but there is a problem. Initially I replaced 2 controls with the preamps volume and treble pot but found it unnecessary to have a treble cut on the acoustic out and so ditched it (cut the cables and soldered them together). I got the bridge from here Guitar parts UK Spares Online for £6.99 I think it was pretty cheap. ![]() The cable I threaded under the pickup cover of the Bridge Humbucker which meant making a slot in the bottom of the cover for the cable to fit but at least meant no serious holes drilled in the Les Paul itself (at this stage). It was pretty simple but the bridge was taller so had to go to the very lowest setting to keep the action low enough. If it helps I installed a piezo bridge into My Epiphone Les Paul.
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