Newbie Help - Designing 2 way speakers

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#144
Dissident Sound said:
OK i will again excuse myself with a warning to @electronicsman to not buy anything until you can go through the entire design process on your own without relying on any files generated by somebody else.

they could have made a mistake and you will end up eating the cost of it unless you can return the driver and crossover parts to the store.

By contrast @A4eaudio did actually build this speaker and made it work but with a 1.4 khz crossover which is an extremely low crossover point for a 1" dome tweeter.

My guess is that if you want to do a 2-way using this 8" driver you will have to go with that low 1.4 khz crossover point, which will put a lot of stress on the tweeter.

If your goal is to simply build something then you could go through with building something similar to what @A4eaudio has built except using a cheaper dome tweeter.

but if you want a high performance system to actually enjoy for at least a few years then this 8" Dayton won't work in a 2-way.

but frankly unless you're willing to build your own box, do a 3-way and use drivers other than Dayton you can't have very high expectations anyway.
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The RS225 is generally praised for its performance. However, I'm not trying to sell anyone on its use. I'm showing possibilities. I have several Dayton drivers that I consider excellent. I've bought others that didn't meet my needs, and I returned, or sold them years later.

Parts Express has a 60 day return policy. There's also 53 five star reviews on their web page for the RS225. I'd like a pair, but the P series is the one I'd probably want. Not sure what I'd build though. I'm currently playing with an RS270p-4. Love it, but it's no longer available.
 
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#145
Well, I got bored waiting for replies, so I made a sim with a tweeter added. This is the very steep slope filter. The slight dip at 3k was intentional. A cap value change fills it in if desired. Mostly, I wanted to see if the steep woofer slope would be difficult to match up with. It was pretty easy. I grabbed an available frd from my computer files. Might be a DC28f. Not sure, and doesn't really matter, as this was just a test.
 

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#146
svp said:
Why breakup power is less than plot shows? Is there some rule, that simulations are more harsh?
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Breakup peaks can be greatly exaggerated when using a response plot. In it's nature, breakup changes with angle. The bigger peak is usually measured on-axis (0 degrees).

0 degrees represents a tiny amount of the total radiation surface and hence power with regard to omnidirectional radiation. Shown here, the red 0 degree (+/- 5 degrees) is 27dB down in power terms (using 3dB per halving rather than 6dB).

slice2.png
 
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