Curious if any of you guys have heard or listened to the smaller scan speak ring radiators?
Im confused by the specs , tweeter has a FS of 625 but they recommend Xover at 3k and above ?
Fs and usable frequency range aren’t as directly correlated as some would have you believe.
If you take R3004 tested by Hificompass as any indicator, it is exceeding 1% distortion range below 3kHz at 2.8V, albeit 2nd order dominant. You can expect the smaller R2004 to have a similar characteristic distortion profile, shifted up in frequency due to the smaller radiating surface area.
My process has always been to disregard whatever the manufacturer or anyone else suggests and complete my own evaluation.
Judging by what others have said about the peerless 1" ring radiators.. They suggest ~2.7khz min.
I suppose it is largely due to the reduced radiating area compared to a dome. The center is fixed and unable to move, where a dome has the whole dome surface to act as a piston.
2.7k for the XT25SC50/60/90, and I typically advise 2.3k+ for the XT25TG30. I have not used the beast nipple.
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Makes sense, sorry , didnt even bother to look at the distortion graphs. So why even post the low FS?
With a low Fs, crossover impedance compensation is less of an issue. Low Fs usually results in an extended frequency response down low as well.
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Mr. Schumacher, I presume?
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Also, the resonance frequency is a standard parameter given in spec sheets. They don’t just decide not to give it if the part may not fit with a ‘rule-of-thumb’ for choosing applications, it is still a property of the driver and could affect some things.
General advice, look at the actual distortion plot at the target playback level (regardless of published Fs, rules-of-thumb notwithstanding), and don’t overstress small format tweeters. Harmonic distortion is a sign of other things going wrong and there could be other impacts on linearity.
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