E-Pro (East-Professional), now East UK (official title East Tone UK Ltd), was formed by John East in 1998 in order to market one of his first products, the J-Retro 01, drop-in retro-fit preamp designe...

East designs are created from a ‘pro audio mindset’ This means an emphasis on performance and getting the job done right. They can be heard on just about every genre of music. Although compromises...

Shortly before his untimely death, Prince received a custom Purple Special guitar from Gus Guitars – he liked it so much, he commissioned luthier Simon Farmer to build him a bass version. Like t...

Sony Pro Audio Japan commissioned the setting up of an independent UK design group in 1988 – Oxford Digital (to become Sony Oxford in 1993), their main project being to create the OXF-R3. John, a fo...

This 200W Tube Output Stage Amplifier was designed by John in 1976, a joint venture with Zoot Horn, his employer at that time. Probably the first of its kind to have a Solid State Preamplifier that in...

John (mid 90s), having suggested a more advanced but expedient operational scheme for Sony’s DMX-R100 design, was subsequently commissioned to finalise the design in Japan at the Sony Design Centre....

Martin Sims commissioned John to implement a workable design for his novel patented Super-Quad pickups system. He designed the switching system for the quad coil pickups from the ground up according t...

In conjunction and agreement with John Littler, owner of Headway Music Audio, John designed the input stages, other circuit blocks and the overall schematic implementation for the EDM-1. Visit Headway...

In conjunction and agreement with John Littler, owner of Headway Music Audio, John designed the input stages, other circuit blocks and the overall schematic implementation for the EDB-2. Visit Headway...