Colin J Wonfor has refined his SECA (Single Ended Class A) derived amplifier circuit over many years. All EWA amplifiers incorporate this unique technology and feature almost no harmonic distortion.

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CV-19: ABCaudio & EWA continue to fulfil orders throughout CV-19 restrictions. We are taking our time to work hygienically and safely.

All products are carefully cleaned with medical alcohol before packing and shipment. 

Home of the EWA cable system and SECA technology for amplifiers, by Colin Wonfor.  Contact us: info@ABCaudio.biz.  All text and images copyright 2021. ABCaudio, United Kingdom.

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