When it came time for CF Martin to find a large sound room for research and development purposes they decided on a Custom 16' x 16' VocalBooth Gold Series. Martin Guitars assembled the booth right on their factory floor. The C.F. Martin & Company is a US guitar manufacturer established in 1833 by Christian Frederick Martin. Martin is highly regarded for its steel-string guitars, and is a leading mass manufacturer of flat top acoustics, with models that retail for thousands of dollars and vintage instruments that often fetch six figures at resale.