Founded in 1991 by engineer and stereophile Michael Chang and his sister Stella, Chang Lightspeed Audio makes handcrafted powerline filters and accessories for high-fidelity audio and video systems. Its Toledo, Ohio, technicians hand-assemble and test each unit, using a coil-free design intended to reduce AC contamination while preserving instantaneous current delivery. The company’s products are distributed to buyers worldwide.
RoHS (Restriction of Hazardous Substances) Compliant
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Lightning Boy AudioEstablished in 2011 by Mike Congilosi II, Lightning Boy Audio designs and hand-crafts audio transformers and studio equipment in North Collins, New York. The company grew from Congilosi’s early vacuum-tube studio gear and pedals into a transformer-focused operation, with manufacturing, testing, and R&D conducted in its own laboratory. Its equipment is built in the USA around a longstanding interest in high-fidelity sound, tube character, and careful noise performance.NORTH COLLINS, NY
Linear Tube AudioFounded in 2015 by engineer and audiophile Mark Schneider, Linear Tube Audio builds high-fidelity tube amplifiers and DACs by hand in its Takoma Park, Maryland workshop. Its designs center on David Berning’s patented ZOTL technology, pairing tube naturalness with the clarity and control associated with solid-state audio. LTA’s equipment is built to order, extensively tested, and burn-in tested for a full week before shipment.TAKOMA PARK, MD
MarantzFor nearly 70 years, Marantz has designed and made high-fidelity audio equipment, from amplifiers to home-theater components, with a distinctive blend of artisanal craftsmanship and modern networked sound. Founded around Saul Marantz’s pioneering work in Hi-Fi amplification, the brand has maintained a manufacturing home at Shirakawa Audio Works since 2002 and now operates under Harman International.CARLSBAD, CA
Harmonic Resolution SystemsFounded by chief engineer Michael Latvis in 1999, Harmonic Resolution Systems is a Buffalo-based company known for applying deep vibration-control engineering to high-end listening systems. Its skilled craftsmen manufacture U.S.-made audio stands and isolation equipment, using proprietary materials and hands-on inspection to help music and home-theater enthusiasts reduce unwanted noise as their systems evolve.BUFFALO, NY