I’ve never owned a Ferrum product. I very much appreciate the compact designs though and I enjoyed the brief time I spent with a friend’s Oor. I’m surprised at how well they did with this one, seems action-packed with really great tech. They’re starting to become a very reliable name that tends to punch well above their weight class. The ERCO is the only piece of gear from them that hasn’t found a big following.
Would be interested in your opinion on the Questyle CMA 15, I tend to dislike ESS DACs, however I purchased one while downsizing to make room for a E-Stat system and have been very pleasantly surprised with the sound. Might just be the way it pairs with the AMP, but it’s very natural and without the qualities I disliked in previous ESS products I’ve heard.