Hi Wayne and friends.
I recently gave a friend a bunch of stuff that was unused from an old Pi4 pair of speakers. These were based on Eminence Delta 15" drivers, and used Eminence crossovers with the lights. They also had an added cable for compatibility to PI design. This is really a blast from the past.
Here's the problem. I don't have the design sheets anymore. Did anybody save theirs? Any help is appreciated.
Steve
Wayne Parham Messages: 18783 Registered: January 2001
Illuminati (33rd Degree)
You must be talkin' about the old Theater Series four Pi model. It was one of the most popular. I'll see if I can't dig up the plans.
For bonus points, modify that old design by upgrading the HF section to match the newer models. Install an H290C waveguide and use the tweeter section of the current crossover, using the same R1/R2 values as you have now. The crossover is almost the same as it was back then, so only minimal changes are needed.
Thanks Wayne. Yes, I remember it was the Theater 4 model. I had the drivers, the Eminence crossovers, heck I even cut the wood for the boxes. I was moving and gave it all to a friend. He's had them for years, and now wants to finish the build. I doubt he's interested in upgrading the speakers. I live 1800 miles away from him, and he has no tech ability. LOL this should be interesting.
Steve
Rusty Messages: 1184 Registered: May 2018 Location: Kansas City Missouri
Illuminati (3rd Degree)
Tell your friend they're great speakers. BIG, but for the money, which is minimal one of the true bargains in audio. I've used mine for decades now. They rather quenched my desire yearning for something "better".
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