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In Reply to: RE: Would wiring 4 super tweeters per speaker box increase life of tweeters? posted by domic on February 23, 2017 at 19:44:23
Bass, midrange, super tweeter(s). No tweeter so a hole in the sound between the midrange and the super tweeter(s). Why?
NB: the term super tweeter refers to units whose main operational range lies above the conventional limit of hearing (20kHz) hence the "super" prefix. Thus they would normally be used in a 4 way design or have their own crossover with sensitivity adjustment if added as an aftermarket device to a (for example) three way speaker.
As for having 4 of them wired to a three way crossover there may then be problems from the resulting net impedence which could make driving them a problem. There is also a question of dispersion.
Longevity really depends upon power handling and heat dissipation so without knowing what the tweeters actually are and the circumstances they are to be used in it is difficult to have an opinion.
Edits: 02/23/17Follow Ups:
I may want to build 2 speaker boxes. Each speaker box will have 1- 15" bass woofer,1 midrange and 4 super bullet tweeters, wired to a 3 way crossover. LETS TAKE IN CONSIDERATION every speaker is wired correctly to a correct 3 way crossover, the question is, will 4 tweeters per speaker box last far longer compared to if only 1 of the same tweeter was wired to speaker box? Since 4 tweeters will be handling only 25% of the power thus longer life per tweeter, whereas if if only 1 tweeter was wired it would be handling 100% of power therefore shorter life? Am i correct about this?
HERES a photo of the 3 way crossover-
4 tweeters can be wired to have the same impedance as one, so yes, no worries.
The reason there would be any concern would be if you were clipping the amplifier. It that is the case you might fry all 4 tweeters since they don't handle much power!
Your requirement would not be relevant if a single supertweeter is being used within its correct operational design parameters. Having 4 of them operating within the same correct operational design parameters won't necessarily make any practical difference to longevity which can also depend upon matters like ferrofluid if applied drying out over time.
So I assume that you want to use lots of them in order to handle power levels outside of their individual design envelope. It seems to me that the answer will partly lie within the crossover design. For example, if the 4 tweeters are simply wired in parallel to the (super) treble section of the crossover then the load impedence will drop and they will accordingly draw more current which may defeat your objective. So the concept that multiplying the number of speakers will result in a proportionate increase in acceptable power handling capacity is not necessarily true.However you do say that the speakers will be correctly wired. As already mentioned there may also be a penalty paid in maintaining correct treble dispersion in relation to the other drivers although this is a moot point given that these are supertweeters operating above the conventional limit of hearing.
However I am sure that there are other inmates who will know a lot more than me.
Those things are pretty worthless since they treat the drivers like they have constant impedance, which they do not. A crossover has to be designed to accommodate the drivers in the speaker system. Buying off-the-shelf parts and throwing them in a box rarely results in anything listenable. On the bright side, it's a good learning experience.
When you can't make them see the light, make them feel the heat.- Ronald Reagan
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