Specs?
One of the airplane guys asked for:
"I would love to see a response curve, and a harmonic distortion plot."
Is there anything I can point him to?
Thanks!
One of the airplane guys asked for:
"I would love to see a response curve, and a harmonic distortion plot."
Is there anything I can point him to?
Thanks!
No please don't. It will completely destroy the magic. Tell your friend to leave well enough alone . Call it the Bose effect and walk away. Seriously.
Cheers.
Cheers.
Well, I read about a third of the way through this thread and built one speaker for an Aurasound Whisper. Let's just say it was a good learning experience learning how to make foamcore make those tight bends. 😱
So now I'm going to build two more using what I learned. (Make shark gill slits on the inside of a bend and only glue down short pieces.) But before I do, would someone be so kind as to tell me how deep to make it and the throat area? I'm using the pattern I found here and have it drawn out on a 14" square. The first one I built 14" square by 3" deep and the throat area matched the Sd of the Whisper.
Here are the specs for the Whispers:
Thiele-Small Parameters
Resonant Frequency (Fs)250 Hz
DC Resistance (Re)6.4 ohms
Mechanical Q (Qms)4.72
Electromagnetic Q (Qes)0.80
Total Q (Qts)0.68
Compliance Equivalent Volume (Vas)0.01 ft.³
Maximum Linear Excursion (Xmax)3 mm
Surface Area of Cone (Sd)13.2 cm²
Thanks!
So now I'm going to build two more using what I learned. (Make shark gill slits on the inside of a bend and only glue down short pieces.) But before I do, would someone be so kind as to tell me how deep to make it and the throat area? I'm using the pattern I found here and have it drawn out on a 14" square. The first one I built 14" square by 3" deep and the throat area matched the Sd of the Whisper.
Here are the specs for the Whispers:
Thiele-Small Parameters
Resonant Frequency (Fs)250 Hz
DC Resistance (Re)6.4 ohms
Mechanical Q (Qms)4.72
Electromagnetic Q (Qes)0.80
Total Q (Qts)0.68
Compliance Equivalent Volume (Vas)0.01 ft.³
Maximum Linear Excursion (Xmax)3 mm
Surface Area of Cone (Sd)13.2 cm²
Thanks!
Thanks. I'll build it 2" and then compare it to the 3" I did already.
I'm about 3/4 of the way through this thread now. I have a pair of RS 40-1354 drivers and may have to try them in a 3' by 5" Cornu.
I'm about 3/4 of the way through this thread now. I have a pair of RS 40-1354 drivers and may have to try them in a 3' by 5" Cornu.
This weekend I finished reading this thread and finished my second Cornu.
Keeping in mind that I listen to primarily acoustic music (bluegrass and folk) but I'm really impressed with these. Acoustic bass is apparent enough to enjoy my music and I really like the mids and highs of these small drivers. The 3" sounded a bit hollow, but I stuffed the horns and I really can't tell much difference between the 2" and 3" deep versions.
I just finished printing and taping together the plan for a 20". I have a pair of Fountek FR89EX that need a good home....
Keeping in mind that I listen to primarily acoustic music (bluegrass and folk) but I'm really impressed with these. Acoustic bass is apparent enough to enjoy my music and I really like the mids and highs of these small drivers. The 3" sounded a bit hollow, but I stuffed the horns and I really can't tell much difference between the 2" and 3" deep versions.
I just finished printing and taping together the plan for a 20". I have a pair of Fountek FR89EX that need a good home....
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Very neat and nice work, Db6546! Glad they worked out for you. This is the first pair I have seen with these small 2in full range drivers.
Thanks, guys.
The driver is an Aurasound Whisper. They were $12.50 on sale.
Aurasound NSW2-326-8AT Whisper 2" Extended Range Speaker Driver 8 Ohm
The driver is an Aurasound Whisper. They were $12.50 on sale.
Aurasound NSW2-326-8AT Whisper 2" Extended Range Speaker Driver 8 Ohm
I started laying out the 20" plans on the bottom plates and didn't feel like poking all those holes.
So I came up with another approach. I laid my plan on the bottom plate and pushed three pins in for alignment. Then I put the pattern on the second bottom plate and pushed those pins in again. Now I can remove and replace my pattern on both plates and keep the pattern aligned.
Then I cut the pattern on the outside line in 90 degree segments. I traced the pattern outline, put it on the second plate, and repeated.
Cut on the outside again in 90 degree segments. Trace again.
Repeat. Once you get past the second set of vanes you can cut in 180 degree segments.
It turned out pretty good. It's more accurate than the hole poking method I used on my first set. It may not make any practical difference, but satisifies my OCD. 😀
So I came up with another approach. I laid my plan on the bottom plate and pushed three pins in for alignment. Then I put the pattern on the second bottom plate and pushed those pins in again. Now I can remove and replace my pattern on both plates and keep the pattern aligned.
Then I cut the pattern on the outside line in 90 degree segments. I traced the pattern outline, put it on the second plate, and repeated.
Cut on the outside again in 90 degree segments. Trace again.
Repeat. Once you get past the second set of vanes you can cut in 180 degree segments.
It turned out pretty good. It's more accurate than the hole poking method I used on my first set. It may not make any practical difference, but satisifies my OCD. 😀
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i built these for my wife with Fostex FF125K
An externally hosted image should be here but it was not working when we last tested it.
i built these for my wife with Fostex FF125K
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You will not be disappointed. That driver in that size Cornu is still the finest I have built to date.
Damn the torpedoes, full speed ahead!
Wasn’t yours already worked over?
Stock they have some ringing that takes some tweaks and long brealin to minimize.
dave
Stock they have some ringing that takes some tweaks and long brealin to minimize.
dave
Bravo! Nice job. How does your wife like them. The astrology motif is genius. I know lots of people who are into that.