Hi,
If you feed those drivers in coincidental ring arrangement with delay ladder, you'll have an Quad ELS63 'clone'
It'll also make directivity more uniform by forming an almost spherical wavefront. If you'll drive all drivers in phase directivity is very high. But never mind since high directivity can sound very detailed if you'll stay in sweet spot. It depends what you like.
BTW I like the dipole concept. Add a dipole bass and you'll be done!
- Elias
Here's the first test baffle the screws wrecked it a bit.
Now the wiring begins
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Too late...
I saw this this morning, seemed very interesting. Maybe next time.
http://www.diyaudio.com/forums/multi-way/165596-constant-beam-width-transducers-line-arrays.html
I saw this this morning, seemed very interesting. Maybe next time.
http://www.diyaudio.com/forums/multi-way/165596-constant-beam-width-transducers-line-arrays.html
OK first listen: I like it!, they go very loud!!! I don't think I've ever felt midrange before lol, very small sweet spot though, they're very detailed, vocals are suprisingly clear and I can hear things in some songs that I listen to a lot that I never knew were there, bass is tight but not very deep.
I'll have to make the other one now
I'll have to make the other one now
Your observations are generally similar to those of my friend who built much smaller 4x4 and even other friend of mine who built just 2x2
seems to be generic sound of an array of small drivers - impact, transparency and detail
Add a dipole bass and you'll be done!
- Elias
or just equalize it - such an 10x10 array can move a whole lot of air by itself
as I said before - it's at least 94 dB @35 Hz of max SPL within linear displacement - if one needs more in his listening room then I believe one must be a happy and rich owner of a BIG room
otherwise one really needs to consult his doctor I'll have to make the other one now
I envy You! You lucky guy!
best,
graaf
Back in the 1970's there was a design published in a magazine (forgot which one) that had 16 5 inch speakers in a frontal array. The impedance was adjusted by wiring them in a combination of parallel and series to a total of 8 ohms. You could probably do the math for the 200, or 100, or a multiple of 16. A 4 ohm impedance could also be achieved this way as well.
I do not know if a series-wired array would have phase distortion problems, as each speaker would act as a length of transmission line, magnified by the magnetic field and coil capacitance. I built lump constant delay lines for a military contractor in the late 1950's that added a constant delay for each inductance/capacitance unit after the third one in series.
I do not know if a series-wired array would have phase distortion problems, as each speaker would act as a length of transmission line, magnified by the magnetic field and coil capacitance. I built lump constant delay lines for a military contractor in the late 1950's that added a constant delay for each inductance/capacitance unit after the third one in series.
The line array will put that square to shame.
I built a mock up of an OB line array with 12 4" drivers and was absolutely amazed by the sound. I hope to actually build the real things someday (drivers were purchased ~5 years ago
).
Some other ideas:
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An externally hosted image should be here but it was not working when we last tested it.
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