Q.E.D., from the Latin quod erat demonstrandum, translates to "which was to be demonstrated". The abbreviation Q.E.D. is basically used to symbolize that an initial theory has thusly been proven. This proof is seen in the process and evidence shown through out the experiment. This is the long-winded explanation of what we strive to do at Q.E.D. with our guitars. What begins as constructional, material, and dimensional experimentation gives us an end result that our theories were correct. We incorporate carbon fiber, Nomex, and laminate construction technologies into the successful building approaches of the past century. We are able to create instruments that are more tonally sophisticated, easier on the eyes, and structurally sound than the classically built instrument. While our Spaniard and Orchestra models derive their foundational body shapes from Hauser and Martin, they have been finessed to distinguish and enhance their tone. Our Argonaut body was built from the ground up using the golden ratio to perfectly balance the frequency spectrum and overall projection of sound.

Brandon Aschenbrenner, the founder and head luthier of Q.E.D. Guitars, studied both mathematics and studio art during his undergraduate years. After graduation he studied with world-renowned luthier Robert O'Brien at Red Rocks Community College. While a Teaching Assistant at RRCC, Brandon has also studied with Bob Benedetto, Alan Dunwell, and Bill Nesse.