after the worrying, this played and sounded fantastic - in combination with my 1980 Ibby Roadster with both channel 1 and 2 patched together, setting at 8.5 master vol, mids on both channels on 8, bass at 6, trebs at 6, through a TC 4x10 it produced a really sweetly driven JJ/Stranglers type sound that made playing a pleasure.
Happy.