class a

Bought from Tony L just over a year ago, this has given me some unforgettable listening sessions. In excellent condition, recently recapped. 30W, Class A, single ended, and pretty rare. https://www.stereophile.com/solidpoweramps/674/index.html It works well from line sources with a good...

Bit of an amp rethink going on here, so with some regret, letting this go. https://www.sugdenaudio.com/a21se-integrated-amplifier Bought about four months ago from a PFMer who put it up on eBay, and I snapped it up. It owes me £2500, but as it's now on its third owner £2200 (OVNO) seems...

Hi there After a couple of years from purchase my amp is starting to show lowish frequency noise in both channels with some startups. It is quite an intermittent fault for now but it's happened 3 times so I need to look at it. I have asked the Primare UK distro repair service and they think it...

This is a test mule for a new amplifier by Colin Wonfor in a scrappy project box (the amp is in the scrappy box, not the Wonfor). It's only managing about 18W class A, and that much again in A/B due to a lack of serious heat sinks. But it keeps doubling down as impedance halves, to one ohm...

Hi there I've fallen for the hype for the Hood 1969 class designs of amplifier boards and I have built a prototype amp yesterday, just a couple of problems perhaps you can help me with. Pictures, sorry none at the moment, but if there is any interest I can post what I have working now...

I am going to be building a pair of mono blocks using the latest iteration, V3.1, of Colin Wonfor’s SECA PCBs. I am aiming for the maximum output power of 40 wpc. I am currently getting quotes for toroids. Each mono block will require a heatsink rated at 0.1 degrees C/W or better. That’s a...

https://www.elsdonwonfor.com/ New web page up but not yet completed. phew. o_O

https://www.abcaudio.biz We are pleased to represent Colin Wonfor and his current product range. Our web-shop is focused on two areas, cables from the EWA cable system, and EWA amplifiers based on SECA technology. Colin's design career has been a long one. In audio, he is behind companies such...