Wayne Parham Messages: 18791 Registered: January 2001
Illuminati (33rd Degree)
I love the sound of a good ribbon tweeter, but I don't think it's a good match with a seven Pi. Ever since I've been making speakers with uniform directivity, I've limited my top crossover frequency to being low enough for constructive summing at all angles within the desired vertical pattern. Supertweeters crossed over in the top-octave don't fit this paradigm because the best possible implementation would only integrate properly straight on the forward axis. Movement of only a couple degrees off-axis puts you into an anti-phase null. Another thing that is a problem is there is usually a mismatch in efficiency and power handling such that the ribbon is too taxed. It needs to be capable of at least 95dB/W/M and to match the dynamic range would need to be able to generate 125dB at full power. Is the Panasonic ribbon up to it?
Wayne Parham Messages: 18791 Registered: January 2001
Illuminati (33rd Degree)
At that sensitivity, you'd have to run a vertical array of them. That might be worth exploring, but it ventures into a whole different realm. I would not use a single ribbon as a supertweeter for a seven Pi loudspeaker.
I did not receive your painting yet but I'm watching for it. Looking forward to it!
Please post a link to your artwork website. It is excellent and I think everyone here would like to see it!
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