Shifting to a new thread from here

The RS225-4 seems to have a pretty unique graph from the rest of the RS225 family including the RS225Ps. There doesn't seem to be any cone breakup! See the published graph here. This is very similar to some large full range drivers.

So, the question is, can this driver be used in a two way? If so then

1. Which tweeter to use? Obvious would be the RS28A, but it looks like it will be out of stock for a long time. I have a pair of RS28F, would this mate well with the RS225-4 Aluminium? I might be able to obtain a pair of RS28A, but looking for alternatives. Would any of the SB26 do - SB26STAC or SB26STCN, any others?

2. What crossover point? Assuming that it really doesn't have a horrid come breakup, then it can be crossed high. Beaming starts above 13740/6.5 = 2113hz, so a 2k is possible? From mid surround to mid surround, it is 6.5". 13740 is speed of sound in inches. CTC plament based on the tweeter diameter suggests 1800Hz, especially if it is huge 4" tweeter. Smaller diameter tweeter faceplate might get us to 2Khz

3. How do i verify the FR graph of the RS225-4? I have the driver, but haven't built the box. I am going to build the box, but whant can i do now so that the box isn't a complete wasted effort?

4. The box in question is a 60Lt tuned to 30Hz for 29Hz F3 on a 12" x 40" baffle, with the tweeter at 36" and Woofer centered at 29" above the floor (Assuming 4" tweeter face plate diameter). What about floor bounce and nulls?

Feasible / measurable / not worth it? Any published desgind with RS225-4? All i could find were lots and lots of projects with the RS225-8.

The RS225-4 seems to have a pretty unique graph from the rest of the RS225 family including the RS225Ps. There doesn't seem to be any cone breakup! See the published graph here. This is very similar to some large full range drivers.

So, the question is, can this driver be used in a two way? If so then

1. Which tweeter to use? Obvious would be the RS28A, but it looks like it will be out of stock for a long time. I have a pair of RS28F, would this mate well with the RS225-4 Aluminium? I might be able to obtain a pair of RS28A, but looking for alternatives. Would any of the SB26 do - SB26STAC or SB26STCN, any others?

2. What crossover point? Assuming that it really doesn't have a horrid come breakup, then it can be crossed high. Beaming starts above 13740/6.5 = 2113hz, so a 2k is possible? From mid surround to mid surround, it is 6.5". 13740 is speed of sound in inches. CTC plament based on the tweeter diameter suggests 1800Hz, especially if it is huge 4" tweeter. Smaller diameter tweeter faceplate might get us to 2Khz

3. How do i verify the FR graph of the RS225-4? I have the driver, but haven't built the box. I am going to build the box, but whant can i do now so that the box isn't a complete wasted effort?

4. The box in question is a 60Lt tuned to 30Hz for 29Hz F3 on a 12" x 40" baffle, with the tweeter at 36" and Woofer centered at 29" above the floor (Assuming 4" tweeter face plate diameter). What about floor bounce and nulls?

Feasible / measurable / not worth it? Any published desgind with RS225-4? All i could find were lots and lots of projects with the RS225-8.

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