Your Sudgen is a respectable amp, and have worked on some Altec related custom designs with a few friends, they can be transparent with great crossover parts inside, once upgraded. While I hate to open this can of worms, what sort of source and cabling are you running for ICs and speaker wire?
Are you already running silver plated interconnect or speaker cabling, sometimes a simple move from OFC to OCC crystal copper cabling can add transparency. OCC can be really open and smooth too. Maybe some other areas to check too while considering replacing your amp, fwiw.
Are you already running silver plated interconnect or speaker cabling, sometimes a simple move from OFC to OCC crystal copper cabling can add transparency. OCC can be really open and smooth too. Maybe some other areas to check too while considering replacing your amp, fwiw.