I own the Croft Integrated. It's a terrific little amp but with modest power. {The eminentaudio.co.uk has a review by Ken Kessler.} It's good in all areas of sound production but not the best in bass slam. The midrange is particularly good. The tonal colors are very good. I'm not sure what your question is; but I'm happy to answer any you might have.
Jim
Jim