I took a week off my regular audio work to build myself a Radford sta100 as a pair of monoblocks. These are signature amps with a lot of foo inside including Black gate capacitors and Audyn true copper caps. They are point to point wired and the transformers are specced to take KT150s or KT120s, both of which thrive off the high HT of 630v and high screen voltage. The KT120s sound much better to my ears, suiting the output transformers better.
So how do they sound? I’m fortunate enough to own a pair of Silvercore 833 monoblocks and my wife has a pair of Mastersound 845 monoblocks and this amp shows both of these a clean pair of heels. It’s got effortless scale and majesty, and sounds very sweet across the whole frequency range. I’d like to thank Will at Radford Revival for help and advice along the way and for speccing and supplying the transformer sets. The output transformers are rated at 100 watts continuous output. Now here’s a pair of amps that will drive any Tannoys! I’m open to building some more of these or even a stereo version……
AD Audio Consultants 