Having recently replaced the subwoofer speaker in my tourer I am left with a spare. I found it cheaper to buy 2 rather than one! The speaker is brand new and a direct replacement for the Harmon Kardon one in the rear right of the tourer. The only thing it needs is a small connecting lead to go from a 6.4mm Lucar connector to 4.8mm connector (I will supply that).
If your H/K subwoofer has seen better days this an excellent replacement.
This is the speaker:
https://www.ebay.co.uk/itm/195923567957
I am after £25 plus postage or collect from South Wales.