If you look at the audio magazine of the 1960's into the early 1970's you find there is very little written about Wharfedale speakers in general. Wharfedale did not advertise much and the rule back at the time if you didn't advertise your speakers you were not reviewed this is especially true in Stereo Review magazine. The Julian Lab reviews were the holy of hollies at the time and so far I have only found reviews of the the W25, and W60E speaker. Both of those review were in magazine issues that had Wharfedale add's. Audio magazine was so far the only magazine that I have seen regular advertising by Wharfedale. Wharfedale, at the time, was a marque mainly marketed in the East Coast concentrating in New England. The only reason why I know about the Wharfedale there was a stereo shop in Key West Florida that sold Wharfedale speakers. I was in the US Navy at the time, stationed at the Naval Air Station in Key Largo. The reviews at the time are dominated by AR, Altec Lansing, EV, KLH, University, Fisher, Scott, etc. A lot of the problems with Wharfedale speakers today are caused by abuse by later owners. It does not take much in wattage to drive any of the Wharfedale Speakers even the gigantic W90 is happy as a clam with no more than 45 to 50 watts. They are wonderful on a 20 watt tube amp. Right now I am listing to a pair of W35's, which were purchased by me at that Stereo shop in Key West, Florida 46 years ago. Else where on this form I chronicled my refurbishment of these wonderful speakers.
So many of the problems you see with Wharfedale speakers, and not just Warfedale in vintage speakers, is later owners abusing them them with to much power. An uneducated person looking at the gigantic W90 might think it needs a bunch of power to drive it and hit it up with 100 or more watts and wonder why it goes kablooey. The W90 is happy as a clam with a 20 Watt tube amp. Right now i am listening to my W35's they sound great with the 30 watts they are being driven with from the Dayton class "D" amp. If you don't have a nice tube amp to go with one of these vintage Wharfedales these Class "D" amp are a match made by Saint Vidicon himself.
This difficulty of getting parts for these Wharfedales is frustrating. When one of my W35's was DC'ed by a failing Onkyo AVR it took me five years to find the needed BIC 8950 8" woofer. Since I returned these old friends to service I have accumulated spare drivers for it and my W45's. I believe in the 2nd catechism of Saint Vidicon: If 't be true thee hath'l a spare part the original wilt not fail.