This was sent to me by a representative, Linda Kennedy, of Spendor in England. It explains the history of the SP 1/5. Ms. Kennedy writes:
"Thank you for your enquiry. The 15/2 superseded the 15/1 (which was the same as the SA1). The differences include change of tweeter from the Audax (discontinued) to the Vifa D25.
The 15/2 also had a rounded grille and bevelled hardwood front edge on the cabinet.
In 1995 the USA distributor was looking for a Spendor speaker with an entry level under $1000, so we made the 15/2 for the USA (40 prs) but called them the SP1/5 because we no longer wanted to designate models by numbers.
Shortly after this we introduced the 2000 Series, a range of speakers, which included models under the $1000 level and therefore SP1/5 was not made again.
regards,
Linda Kennedy"
Ok, there we go. I wonder if the "(40 prs)" means only 40 pairs were made for the US? Hmmm. Anyway, thanks to all for playing.
Cheers,
Jerry