Never had integrated amp from Sugden but in the 90's I bought new (demo) a set of Au41 pre and Au31 power amp, still have these in my second listening room with either Magnepan SMG or Tangent RS6. Few years ago I had the chance to find a Au51 pre and Au51 power amp used, they are with Snell Acoustics CII. SUGDEN FOREVER AND EVER
