You could also try different Materials for that Phaseplug, perhaps it would have Influence on the Sound 🙂
btw super Idea 😉
btw super Idea 😉
Some people were embarassingly surprised to find that the 'efficiency' of the drivers varied so much in a single lot . Not very kind (from the Producer) if you intend to put them in series-parallel ...😡
Good point!
Placing identical speakers in series should be avoided. Since their resonances almost never coincide, the voltage divider effect will be ugly. How big a practical problem this becomes depends on the drivers but it's just a yucky idea.
Heck, I had a weird problem where 1 out of 3 woofers in PARALLEL simply excurded significantly more than the others, all in a common cavity.
Last edited:
Well ...the proposed phase plug+diffusor would allow a certain 'pression convolution' that would pressurize the membranes in a quasi-feeback arrangement 
Does "divide by 10" mean the excursion is like 0.4 mm at the peak?
4V would be 1 watt into 16 ohms. 1V would be 1/16 watt. It's just P=V^2/R
I think your idea is very funky 😎
I think some of the other comments boil down to "simulations aren't everything"-nor is logic. I understand what you said about the 8 drivers-they're almost kinda each firing down a plane wave tube. But from the one picture, it looks like not exactly. My speaker designer gut says there *may* be cancellations that are not obvious. But we'll never know until somebody builds one!
Hey, why not mount the front horn on TOP of the big one, to avoid one poking through the other? (Sorry, I can't see the crossover point in this page, but if low the horns don't need to be absolutely coincident for a good blend).
Interesting that such tiny drivers with such a high resonance seem to be able to play pretty low.
Good point!
Placing identical speakers in series should be avoided. Since their resonances almost never coincide, the voltage divider effect will be ugly. How big a practical problem this becomes depends on the drivers but it's just a yucky idea.
Wow some of this stuff got pretty heated back then. Long before I discovered mindfulness and learned that the merit of my thoughts did not depend on others reactions to them. I definitely agree with the statement about different materials though, I think I'm gonna start working in polyfoam and fiberglass. Just need to get a windows machine so I can get back into the groove with hornresp and sketchup. You wouldn't believe the ideas that have been stewing in my brain over the last several years.
Interesting design. Why use a complex array of 8x 1in driver when nicer 3.5in drivers are available that will greatly reduce distortion since more air can move. Are there any special advantages for 8x small 1in drivers with an fs in the 200Hz range? A single SS 10F will sound better and not be as complex. Will not have driver to driver interference issues. Having such a long skinny narrow aspect ratio profile may lead to pipe harmonics similar to a trombone or trumpet. There are also a lot of wall viscous pressure losses for such a skinny pipe. You may get a honking type sound. The oscillations you see above 200Hz and up are basically the pipe harmonics and they might be a bit honky. You might want to add damping in the rear chamber to filter out the stuff above 200Hz. But that will require your front horn to make the SPL from
200Hz and up loud enough to compete with the back wave and integrate nicely.
You could also wrap the pipe around the back and penetrate the horn wall like a Klein bottle.
I think a pathfinder mock-up made of foam core would be well advised before spending energy on a fiberglass layup. A sticky mess of an assembly process only should be used for proven designs.
200Hz and up loud enough to compete with the back wave and integrate nicely.
You could also wrap the pipe around the back and penetrate the horn wall like a Klein bottle.
I think a pathfinder mock-up made of foam core would be well advised before spending energy on a fiberglass layup. A sticky mess of an assembly process only should be used for proven designs.
Last edited:
interesting design
i am guilty in dreaming about using the cheapest cool drive i can find and the biggest design too, never followed through with it yet though.
i am guilty in dreaming about using the cheapest cool drive i can find and the biggest design too, never followed through with it yet though.