Dale employed non-Western scales in his playing. He regularly used reverb, which became a trademark of surf guitar. Being left-handed, Dale tried to play a right-handed guitar, but then changed to a left handed model. However, he did so without restringing the guitar, leading him to effectively play the guitar upside-down, often playing by reaching over the fretboard, rather than wrapping his fingers up from underneath. He partnered with Leo Fender to test new equipment, later saying "When it can withstand the barrage of punishment from Dick Dale, then it is fit for the human consumption. " His combination of loud amplifiers and heavy gauge strings led him to be called the "Father of Heavy Metal". After blowing up several Fender amplifiers, Leo Fender and Freddie Tavares saw Dale play at the Rendezvous Ballroom, Balboa, California and identified the problem arose from him creating a sound louder than the audience screaming. The pair visited the James B. Lansing loudspeaker company and asked for a custom 15-inch loudspeaker, which became the JBL D130F model, and was known as the Single Showman Amp. Dale's combination of a Fender Stratocaster and Fender Showman Amp allowed him to attain significantly louder volume levels unobtainable by then-conventional equipment.