hi,
i have searched around but mostly people on here just use first order at around 15khz for a supertweeter with a fullrange.
I want to play with supertweeter and have ordered some ribbons, question is from experiece, have any of you tried second order Vs first? can anyone explain the difference it made to the percieved sound quality.
cheers
i have searched around but mostly people on here just use first order at around 15khz for a supertweeter with a fullrange.
I want to play with supertweeter and have ordered some ribbons, question is from experiece, have any of you tried second order Vs first? can anyone explain the difference it made to the percieved sound quality.
cheers
the actual answer depends on a few factors, the biggest one depends on the specific "super tweeter".
It depends on the FR vs. mechanical and power limited excursion of the super tweeter.
In general you can think of the first order filter as keeping the excursion constant WRT to frequency below the -3DB rollover frequency. The question is if that movement becomes unloaded and/or if this level of excursion is in excess of what can be linearly handled there can be IM type distortion or worse actual damage or buzzing of the diaphragm.
EDIT: then the next question is what does the summed acoustic response look like...
It depends on the FR vs. mechanical and power limited excursion of the super tweeter.
In general you can think of the first order filter as keeping the excursion constant WRT to frequency below the -3DB rollover frequency. The question is if that movement becomes unloaded and/or if this level of excursion is in excess of what can be linearly handled there can be IM type distortion or worse actual damage or buzzing of the diaphragm.
EDIT: then the next question is what does the summed acoustic response look like...
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The tweeters i am looking at are isodymanic (ribbon) 93db/w and recommend a crossover of >2000hz.
i think the only thing to do is try both.
i think the only thing to do is try both.
Yes. With that kind of tweeter, impedance should be fasirly flat, so it shouldn't be too hard.
dave
So, if you are using it >10kHz (??) then you are more than two octaves above the point where there is no longer sufficient loading (or excursion) to keep the response flat... if you don't have to hit them with power that is too high compared to their rating, you ought to be able to get away with first order...
But you did say "supertweeter" - which usually refers to a device intended to come in where a given driver rolls off, well into the usual range that tweeters run at (eg >~1-2kHz and then going up). Typically when someone says super tweeter I think of supplanting the area from ~14kHz at the lowest to beyond 20kHz... I wonder where you are planning to run them and what they are supplanting??
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But you did say "supertweeter" - which usually refers to a device intended to come in where a given driver rolls off, well into the usual range that tweeters run at (eg >~1-2kHz and then going up). Typically when someone says super tweeter I think of supplanting the area from ~14kHz at the lowest to beyond 20kHz... I wonder where you are planning to run them and what they are supplanting??
_-_-
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