Just received these from a reader and so, thank you Miles.
Neil M.
https://www.audioholics.com/tower-speaker-reviews/jbl-synthesis-s4700-pre
http://www.audioheritage.org/vbulletin/showthread.php?35990-JBL-S4700-Seems-to-be-poorly-made!
https://www.stereophonic.com.au/jlb-s4700-floorstanding-speaker/