Zac Holtzman and his brother Ethan Holtzman had been the core originators of the musical Dengue Fever concept in which this interesting custom built double neck guitar is playing a special role as explained within the video interview by Senon Williams who had been with the band pretty much since their first days.
A Fender Jazzmaster on top and a Cambodian Chapei Dong Veng have been especially built for Zac and it is called the Masterdong.
Interesting guitar effect are supporting the sound of Dengue Fever.