I would like to know if there is any known and documented tweak to upgrade the SQ of my SP9 first version, I seem to recall the MKII is not just different components but I might be wrong.
Do you have any suggestion for updates to improve the SQ?
I recall the consensus was that the SP9 was a disappointment compared to the SP6 and was quickly discontinued to make way for the SP10. Sell the SP9 and get the SP10. You can't make a silk purse out of a sow's ear!
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