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Dayton Audio RS28A-4 1-1/8" Aluminum Dome Tweeter
Possible 8 ohm version
Why doesn't Dayton build a 8 ohm version of this tweeter when their crossovers need 8 ohm tweeters? Are they afraid they will sell like hot cakes
It could be the application for what they are designed and it is the easiest driver for L-pad control. Also, quality system would use active x-over where it doesn't matter. To get over the impedance issue you could use two in series, of cause that would be more expensive. Besides the L-pad, the other way is to design or use available designs besides Dayton made.
Date published: 2013-06-20
How much should this tweeter be recessed in the baffle?
Flush mounting is optimal, diffraction will occur when there is not a smooth transition between the faceplate and the baffle.
Date published: 2012-08-13
Good replacement for Energy pro22 tweeter???
the energy pro22 tweeter covers a lot of midrange. It is notorious for drying out and failing. Anyone have expeience using the rs28a-4 as a replacement? I have tried others, but they lack that midrange. The energy tweet is great...when it works.
The crossover point on the Energy Pro 22 was 1500Hz, so you want a tweeter that can cross that low. This fits the bill, as far as frequency range. However, the original Energy 22 "dual-hyperdome" tweeter was an 8 ohm unit, so the impedance mismatch will shift the hi-pass crossover point up one octave to 3000Hz. That will create a gap from 1500Hz where the woofer starts to taper off until 3000Hz when the tweeter kicks in! Not a good idea. Check out the suggestions below for some 8 ohm tweeters that may fit the bill.History: The Energy 22 Dual Hyperdome was, and in some circles still is, called "the million dollar tweeter". They are just that good. That isn't to say it is better than any other tweeter, they are just very good at what they do, and the crossover in the speaker is was built to perfectly match them with the woofer. If you have the scratch you can send your toasted tweeters to ABI Technical Services in Halifax, Nova Scotia and they will rebuild them for you for about $160 (cdn) each. Its not cheap, but they own all of the original Energy tooling and will make new diaphragms, put in the correct ferro-fluid, and even re-foam the faceplate. Purists say this is the only way to go. (I am not affiliated with ABI or Energy in any way, just a fan.)
Date published: 2012-08-20
How much power can this tweeter take at 1500hz 4th order acoustical?
If you look at the download sheet - you will see two curves. One for frequency response which shows the driver to be pretty flat to 1500 hz. The other graph, however, shows impedance/phase where it begins to cause all sorts of problems at around 2000 hz. So if you were to use the driver below 2000 hz, you would need an additional section to your crossover to compensate for the phase issue. It is called a Zobel. A 4th order network is the best audiophile crossover you can build for many reasons. I suggest 2000hz as your crossover point. Now - how much power can the tweeter take? The specification is 100 watts RMS continuous. Nominally in a home theater system or louder music system - the tweeter may see 10 to 25 watts continuous with peaks of over 100 watts for transients. If you want to push 100 Watts continuous - that is more for a PA application and would require a different driver with much higher efficiency - in the order of 100db 1w/1m minimum... This driver is an audiophile driver with a corresponding efficiency. If you look at many high quality factory built speakers - they will say 88 or 89 db efficient. Hope all this info helps... Good luck with your project.
Date published: 2013-10-28
face plate mounting
what is the spacing of the faceplate screws not the mounting holesie holds the driver to the faceplate
The faceplate mounting screws are 42mm from "corner to corner" and 60mm diagonally.
Date published: 2012-10-30