I tried again in vain to find a speaker mounting ring or hardware image that resembles the rings we see in the open TPU (see the previous fishing with steven photo)
Did anybody find such a pice of hardware?
We can plainly see the audio connector like in this photo below. I also added a picture of a speaker mounting ring, made of steel.
And speaking of materials, those rings would have to be made of metal since he says in the video that the device gets hot, and if he used plastic it would melt and deform. What do you guys think?
EM
Dear Em I have lots of photos of the rings stacked on plastic spacers to form the grille of the transmission line "tube" speakers produced at Spheric Labs. I built many similar "T" line designs in the early 70's, but without such grilles. Back then, it was an inexpensive way to make a reasonably good sounding speaker system that was not a box, and superior to a closed box in many ways. Like all speakers there are tradeoffs, and getting a good impedance match to the surrounding air was a bit of a problem with these. Jack Durban PM'd me about the speakers and the rings: "Great to hear from you. I had no idea that we sold enough speakers to have some wind up on eBay after all these years. To be honest they were just run the mill speakers and those rings in the shot you put up...well they are trimmed in cheap plastic and they begin to spring open over time. I had nothing to do with designing them just the audio processing stuff."When Spheric Labs went out of business they threw out tons of these things according to Durban. I'm sure everyone grabbed a few as tokens, including SM. The shape of the open TPU, wound on that plastic ring has i n my opinion very little to do with the operation of the device. It was just a convenient form to wind the zipcord, and they were stacked to house the inductors and other circuitry. The real key is in the sections of zipcord we see with the ends soldered together. If you want more info please PM me.
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