I don't care for the electrical specs of the tweeter, the specsheets seldom mention how they were established (usually @ or above 5kHz). When crossing at a rather low frequency you must regard the Xmax of the tweeter.
So at 1 kHz the effective Pmax will be dramatically lower than the sheet wants you to believe...
How I know? Experience... tried it myself with an Dynaudio Esotar crossed at 1 kHz/12 db ... changed it rapidly to 1.5 kHz/18db .. that worked.
Greetz,
Edwin
I agree with you about the Xmax, but not about ignoring the electrical specs or the rest of the data sheet. You have to consider everything.
For example, I'm cooking on a couple of designs with the Wavecor tweeters.
Without a waveguide, and with listening levels in the upper 90s, the TW030WA13 is showing no signs of measured or audible distress with a 1kHz acoustic 4th-order crossover (slope gets steeper as the frequency gets farther away from the nominal crossover point).
regards, jonathan
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Anyone think that the SEAS T35C002 could be crossed at 1 kHz? Specs indicate that they were established with a 2.5 kHz, 12 dB per octave crossover.
I don't agree... At low frequencies Xmax is the limiting factor and at higher frequencies the electrical specs.. When your Xmax is .3 or .5 of a millimeter (common for dome-tweeters) you will never be able to apply 100 Watts electrical without damaging the unit. Also, at higher power and low frequencies, you are operating beyond the linear area -> distortion.
Crossing dome-tweeters too low is a bad design choise. And 1kHz is way too low.
Greetz,
edwin
Tweeter power handling in spec sheets is bandwidth limited noise stimulus based anyway and should be taken with a grain of salt. In the real world tweeters can handle 1-15 watts of real power.
Where low xover points are concerned mechanical limits are the main issue by far.
What is your opinion on SB 26-series tweeters ?(SB Acoustics :: SB26ST-C000-5)
Listed p-p travel of 1.2 mm
Listed p-p travel of 1.2 mm
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