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What frequency range would a tweeter with these parameters optimally cover?Parameters
Type: Convex DomeSurround: 3-Layer Fabric
Bobbin Type: Aluminum Alloy
Impedance: 6 ohm
RE: 4.1 ohm
Power Limit: 110 W
SPL /2.83v: 95 db
SD: 6.7 cm2
Voice Coil Inductance: 0.04 mh
BL: 3.3 tm
Linear Excursion: 1.2 mm (total)
MMS: 0.24 gr
FR: 550 hz
QTS: 0.16
Thanks for any and all help!
I'm listening to: One More Once by Michel Camilo
Thetubeguy1954 (Tom Scata)
Central Florida Audio Society -- SETriodes Group -- Space Coast Audio Society
Full-range/Wide-range Drivers --- Front & Back-Loaded Horns --- High Sensitivity Speakers
Edits: 11/02/15Follow Ups:
First I appreciate all the time you guys took, but all I was really looking for is ( if it's possible to do so ) someone to say "I'd use these from 3.5Khz on up." I was just curious because a friend is looking to build an efficient 2-way design. I'm NOT a diyer, but he asked me the question I posed in the OP and I thought someone here could probably answer it for me, so I, in turn, could tell him. These are not for use with my speakers, I'm happy with my Fostex T900a tweeters.
Thanks again for all who took the time to respond...
I'm listening to: Breakfast In America by Supertramp
Thetubeguy1954 (Tom Scata)
Central Florida Audio Society -- SETriodes Group -- Space Coast Audio Society
Full-range/Wide-range Drivers --- Front & Back-Loaded Horns --- High Sensitivity Speakers
...Great Heils you have lying around. You may be surprised ;)
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That one is really about 91dB@ 1W.
Yes, more like 93dB for its actual impedance.
None of those specs say anything useful about the high frequency limit.
FR/QTS is about 3500Hz, which is where the low frequency rolloff begins. So unless you use some crossover trickery, that's the lowest useful frequency.
However, good LF behavior is (in my experience) more limited by excursion-related distortion than by small-signal frequency response. I absolutely do NOT trust excursion specifications for tweeters; they are more often than not wildly optimistic with respect to the audible limit of good behavior. The fact that undefined "linear excursion - total" is quoted instead of the well-defined xmax parameter is a bad but very common sign. (It's probably peak to peak, i.e. twice xmax.)
If I had to work from just the specs, I would assume the useful excursion is 1/10th of the specified xmax, or 1/20th in this case. That would give you a maximum of 100dB peaks at 3500Hz.
Note that 1/2 wavelength spacing center to center is a widely quoted criterion for maximum close spacing of drivers at crossover. In this case that's 2 inches. As you can see, it is impossible to meet this criterion. Speaker design is full of this kind of impossible situations!
Bravo, yer Paulness.
That's the _exact_ _right_ amount of attitude with which to respond to this post.
Thanks for bringing-it.
And thanks for all you do.
I don't know if this fits all your parameters, but it may be a good match for your horns.
Meat; It's the right thing to do. Romans 14:2
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