Crestline Labs LLC is a well-rounded repair facility and custom shop based in Ballston Spa, NY, offering a serious range of services for guitarists and musicians who need their gear properly looked after. The shop is a Line 6 and Ampeg Authorized Service Center, meaning customers can bring in their gear with confidence that repairs meet factory standards. Crestline Labs is also a factory authorized repair facility for a wide roster of major brands including FMIC, Marshall, Peavey, Mesa, Randall, Charvel, and EVH, making it one of the more comprehensively authorized amp and electronics repair shops in the region.

The shop specializes in vintage tube amplifier repair, which speaks to a high level of technical depth and hands-on experience with classic circuits. Beyond amplifier repair and electronics work, Crestline Labs offers Master Luthier services, custom-built guitars, and custom tube amplifier builds. For players looking for serious guitar tech work or skilled instrument repair in upstate New York, Crestline Labs covers a lot of ground under one roof.