If you come across what you think might be junk then before discarding it – just check. These are the Holy Grail of loudspeakers The worlds first 15 inch Dual Concentric the Tannoy Black circa 1947. If it works ok then it will still sound as good as any speaker sold today - no matter what else they may tell you. I'd love to hear it but needs to be soon as my hearing is fading out fast. Ain't old age and a lifetime in heavy industry great?