Who is Colin Wonfor? What has he done? That is a question that requires some answering!

Colin is a chemist, an electronics engineer and an audio engineer. His speciality is analogue electronics and power supplies. This includes massive high efficiency power supply in large medical installations, the ISS power conversion and distribution, three-phase power amplifiers designed to pressure test aircraft fuselage, much work that remains classified for the M.O.D.... and an abiding interest and expertise in audio.

Colin Wonfor's experience as a chemist, power supplies expert & audio designer is extensive. His CV includes organisations such as British Petroleum, the M.O.D., NASA, IBM, Naim, Cambridge Audio, Reid Electronics and many, many others.

Of interest was his work for NASA on the International Space Station, which included work on the solar array and power conversion (and the quietest switching power supply in the... or above the world).

His work is never far away - the ISS (look up), your computer, mobile device, TV, your automobile, Disneyland...

Don't forget one4audio, where his famous class A designs can be found in kit form, for the keen DIYer.

Colin Wonfor helped set up Tellurium Q, a UK based audio company which had it's genesis in another company named Catch22 which Colin was integral to. Tellurium Q went on to become one of the most successful audio start-ups of recent times, largely thanks to Colin's design concepts which formed the foundation of the original TQ product line.


Colin led the technical development of many award winning cables and also some fine amplifiers, marketed as "combating phase distortion". Technically there was a lot more than that going on... The technology Colin developed at TQ is still well regarded even though the company seems to have lost interest in building on earlier technical achievements and is no longer pursuing Colin's original vision. 

Colin's understanding of how to design audio cabling has since progressed significantly, and freedom from corporate concerns has allowed a fresh 'cost no object' approach to R&D. The EWA cable system may now be one of the most expensive raw cables in use for audio (in terms of manufacturing costs). It must also be the most advanced. His latest work takes his earlier, first generation accomplishments and builds on them most impressively.

Colin has quite some experience with power, which he brings to audio. Having once constructed a 3-phase amplifier (used for stress testing aircraft fuselage), he built the largest solid state SECA amplifier in the world - 300W. This amplifier took out the power breakers of the hotel where it was demonstrated...

There were also 150W variants and 50W. A  more sensible range of consumer amps (TOCA) were also sold and can occasionally be found. 

Colin established Inca Tech in Essex, which became a thriving and prosperous company for many years. It started by being the world leaders in gold plated mains plugs and matching sockets - these sold in great quantities (for a time Colin drove an old Rolls Royce, which he had gold plated. Well, it was Essex...)

Later, the company sold the Claymore, one of the most famous integrated amplifiers ever built. These sold in the thousands every month - people were thrilled with the sheer power and musicality of this mosfet based amplifier. They were built so well that a great many remain in use today. Colin is actively servicing and upgrading Claymores, including using modern, superior output devices, so your Claymore will sound better than new!

The Inca Tech, and later ID (Inca Designs) range included a great many amplifiers from integrated to large class A, and interestingly, an FM tuner which may be one of the best ever built. If you find one, Colin will tell you why...

The early days: AC Magnum. A was for Anthony Relph (later of REga), C was for Colin. AC Magnum were a range of high performance pre-amplifiers and powerful Mosfet power amplifiers, heavily biased to A.

These amplifiers are often found going strong today, and are capable of driving the most difficult loads (including large Apogee ribbons and in one case, being used for arc welding).

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Contact us: info@ABCaudio.biz  United Kingdom. EWA designs for cables and amplifiers, by Colin Wonfor.

All text and images copyright 2020. ABCaudio and Elsdon & Wonfor Audio.