The Twin Spot Internal is a twin-head piezo transducer that is designed for internal mount in acoustic guitars and other instruments.
The twin-head system has distinctive advantages towards the single-head transducer: The positioning at 2 spots results in a more balanced sound structure. The frequency range is broader. The small heads with only 1/2" diameters allow an unobtrusive installation. In addition, small areas at the instrument can be reached.
The Twin Spot Internal comes with an endpin jack for internal mount. The jack can be mounted from the outside so no soldering is necessary.