United Kingdom. EWA designs for cables and amplifiers, by Colin Wonfor.

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EWA Oberon

In Development:


The EWA Oberon, resurrecting a previous name used by Colin Wonfor in the past as Inca Tech.


Based on the M-50-P Pre amplifier and in the same chassis, Colin has added one of his cleverest and most sophisticated power supplies to date, and two M-50 power amplifier SECA modules. Although the Oberon doesn't run to the same maximum power as a full M-50, it is biased heavily for class A operation.

  • Six line inputs

  • Speaker outputs

  • Twin buffered RCA outputs

Oberon operates deep into class A: a full five Watts SECA (Single Ended Class A), followed by up to twenty eight class A push/pull. This amplifier gets warm, sounds hotter. Of course, it also functions as an M-50-p pre-amplifier, with both RCA and balanced XLR outputs.

Don't overlook the inbuilt high performance, dual output, SECA headphone amplifier.


Colin Wonfor knows his class A, and the Oberon integrated superbly showcases its sophistication and efficiency in the twenty first century.