2003 - 2006: Clark Blumenstein's interest in speaker design and manufacturing first took root as a fascination with the physics and cultural relevance of the variety of loudspeakers produced throughout history. This fascination germinated alongside the pursuit of a music history bachelor's degree at Whitman College in Walla Walla, WA. Later, Clark began an apprenticeship for three years at the world-famous high-end speaker company Cain & Cain Audio. There he studied under master cabinet maker Terry Cain, then under his widow, landscape artist Leslie Williams Cain.  

2006: Blumenstein Ultra Fi started out of a small home-based workshop with a primary focus on the research and development of small high-fidelity single driver speakers. The initial results were good. Clark began shipping them to a small, but growing number of enthusiastic clients around the globe. 

2009: Clark took a summer-long apprenticeship with Feastrex in Nirasaki, Japan. He studied under and ultimately assisted master driver makers Teramoto-San and Akiyama-san. Clark absorbed the intricate hand-making processes of fullrange drivers using handmade washi paper, exotic Alnico, Field Coil, and Permendur Field Coil magnetic circuits. 

2010: Clark resettled in Walla Walla making speaker for Fostex, Feastrex, and Pioneer Full Range drivers and subwoofers. He first focused on iteratively refining compact wide-band full range single drivers supported by either a subwoofer or a super tweeter. In short, he built many, many experimental boxes!  His quest eventually became to miniaturize the extreme performance of larger and more expensive designs from Cain & Cain Audio and Feastrex into more affordable realms.  He additionally quested after minimizing enclosure size and maximizing durability, non-toxicity, and sustainability. These qualities were crucial for ensuring the speakers could be enjoyed in ever more more practical (read: non-ideal) room placements while retaining superior overall accuracy in sound.

2011-Present: Clark then migrated to Seattle and then most recently to Tacoma where, taking inspiration from the capacious waters of Puget Sound, he expanded production capacity and staff. In November 2015 he finalized what are now the Marlin, Orca, Triton and Benthic speakers, which are augmented by Waterline Cables and Blumenstein accessories. These commercially and acoustically successful designs now ship out by the batch monthly. All of our products, cables and accessories are still built by hand in house, by Clark and his employees, producing with custom made and off-the-shelf components, tools, and sustainable materials.