Best tweeter what can be filtered at 1 kHz

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#41
I's like to know if in practice when driven by a ~constant voltage amp if a 3FE22-4 is about 2dB louder than the 8 ohm version. Faital's spec sheet doesn't seem to indicate the input voltages.
 

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#46
What's your use case - car audio?

Maybe: https://accuton.com/en-home/produkte/lautsprecher/keramik/Keramik-C51-6-286CELL
But I would prefer the big Bliesma for clean top end. You could also get a custom T34 with reduced faceplate, the magnet is 78mm in diameter. That probably won't be cheap and for 2 pcs they can't do a tolerance selection - but get in contact with them, Stanislav Malikov is always supportive.
 
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#49
You need to do some engineering calculations. Look at a speaker design book or the Linkwitz website ( https://www.linkwitzlab.com/thor-estim.htm ) to find SPL equations as a function of frequency and cone displacement. To get SPL 95 dB at 1000 Hz with a 1" dome with cone area Sd 5.3 cm^2 requires an Xmax of 0.9 mm. So that is going to be a mini speaker. The NSW1-205-8A Aurasound Cougar 1" has an Xmax of 2.2mm. So that will totally work. It will make the SPL at 1000 Hz, but it has low sensitivity. Bumping out to 1.125 inch dome it looks like the Morel ET448 will do the job. It has a 72 mm diameter faceplate. Fs 750 Hz, so it will play down to 1 kHz easily. It has Sd = 6.0 cm^2 so you only need Xmax of 0.7 mm to hit 95 SPL. Unfortunately the Morel has an pathetic small Xmax of 0.2 mm. There is a 30 mm Wavecore tweeter Xmax = .65mm that will do the job, but it is on back order. https://www.parts-express.com/Wavec...ith-Heat-Sink-and-Rear-Chamber-4-Ohm-298-1124 . That's probably your best bet. You'll just have to wait to get it.
 
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#52
jzl said:
Audison thesis th 1.5 II violino can handle 1.5 khz LR2. Maybe even little bit lower with 4th order crossover. Diameter of case is 60mm. (Tweeter dome diameter 34mm).
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That is a really nice looking driver. Unfortunately like most tweeters it is missing all the useful specifications. No Xmax number, no distortion curves. For that amount of money it would be nice if they would publish something.
 
#54
I am located n Europe.
Linkwitz had good tool still available, only it is for sub woofers. Is it precise for tweeters?
My favorite till now SB29RDNC-C000-4, give exactly 95 dB at 1000 Hz with Xmax 0.5 mm and Sd 9.6 cm2. It is calculeted as "Excursion limited rms sound pressure level (SPL) for a driver in a closed box (monopole)"
SB26STCN-C000-4 give 100 dB at 1000 Hz with Xmax 1,2 mm and Sd 6.2 cm2.

This calculations make sens. If looking at THD of this tweeters from:
https://hificompass.com/en/speakers/measurements/sbacoustics/sb-acoustics-sb29rdnc-c000-4
https://hificompass.com/en/speakers/measurements/sbacoustics/sb-acoustics-sb26stcn-c000-4
SB26STCN have about 10 dB lower THD at 1000 Hz than SB29RDNC have.

80 mm maximum face plate size will turn some good candidates out.
 
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#56
kaameelis said:
TW030WA13 Xmax is actually given as +/-0.65 what mean 1.3 as p-p. Calculated max SPL on 1000 Hz will then be over 105 dB.
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I didn't check if the calculation was for zero to peak or peak to peak for Xmax. I think you have it right. I find that many dealers interchange them without a care. Here is the calculation posted by Jeff Bagby a while back. Gone too soon.

"For anyone who wants to know and produce their own little spreadsheet here is the formula for Maximum attainable half-space SPL for a direct radiator driver for any given frequency, this is true whether it is an 18" woofer or a 1" dome tweeter:

SPL= 20 * log(10) (1.18 / 0.00002 * Sd * Xmax / SQRT(2) * 2 * PI * F^2)

Where Sd is in Meters^2
Xmax is in Meters one-way linear travel
And F is the frequency you want to solve for.

Jeff B."
 
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#57
You detect the rise of K3 at about 1,3kHz with the SB26STCN-C000-4? That's the limit of linear use for this tweeter. If you stay at low volumes you probably can accept it but always try to avoid such a rise in the 3rd harmonics.

BUT - don't forget if you cross over at 1kHz the tweeter is already down by 3-6dB there! So you get more SPL or need less Xmax as with one driver alone at this frequency.
 
#58
Why I need to look at H3 (K3)? I know it is long disputed issue her on DIYaudo, but as sound pressure is caused by cone velocity not by cone movement amplitude, then H3 of sound pressure is not caused by cone amplitude limitation but by limited cone velocity (out vs in movement velocity) and H2 is caused by cone movement amplitude limitation.
 
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