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

All text and images copyright 2019 ABCaudio & Elsdon and Wonfor Audio


Q20. Power Amplifier

The EWA Q-20, like low power valve amplifiers, is capable of stunning musicality and presence in the right system. The SECA circuit is a essentially a hybrid design consisting of a SECA (Single Ended Class A) input driver stage, and a powerful output stage that operates in class A push/pull.


Producing over thirty Watts RMS total output into 8 Ohms, partner with efficient loudspeakers and you will be treated to the full EWA experience. This includes a truly expansive mid-range with exquisite detail retrieval, hanging in a dense and stable sound-stage. Treble is notably sweet, without any leaning toward harshness or bite, and with a properly rich tone. Bass, whilst not earth shattering is linear and fast with warmth and slam. In the bass particularly the Q-20 excels over similarly low output valve amplification.

The Q-20 is an amplifier which will leave you wondering how it does all this in such a small box, without becoming really, really hot. It is not class D, it does not cheat; Colin Wonfor knows his class A, and the Q-20 is an excellent showcase for its sophistication and efficiency in the twenty first century.