Is there any preference between Bliesma T25B-sb tw29bn or the tw29txn-8?It would be nice to see a power and DI plot for this speaker. One hopes that he took into account these parameters. I like some of his earlier designs... well balanced, smooth.
If I was going to offer a public domain open-source design, I would make available both the simulations and the final measured results.
You are on the right track, this is a concept that has some potential. I recently made some measurements of my TW29BNWG, and I estimate it could be used down to ~ 1.5k. I think to get the most out of the Purifi 8" driver, you should be looking at a 1.2 k crossover. I think the Satori waveguide is a bit on the small side to match up with a high end 8" driver. I would look into an 8" waveguide using either the Satori TW29BN or the Bliesma T34B. Or wait for @augerpro to finalize the waveguide designs for the TW29TXN-B tweeter. Overall, I think the Purifi 8" driver is just perfect for mating up with a larger 8" waveguide.
More or less, yes. The vertical spacing will have an impact, and the slope of the filters (2nd, 3rd, or 4th order) will have an impact. But you are correct.But then, with any non-waveguided tweeter and a 6.5" crossing at 2-3kHz, we can pretty much guess what the off axis looks like, no?
Hi I’m new to diy and looking into some ideas
I currently have a pair of active 2 ways using a sb acoustics 6” mid and tw29 tweeter
Was thinking of diying something active for myself and the Purifi amps and drivers look great
Has anyone got a design or idea for a Purifi 8” 2way with something like the sb tw29bnwg tweeter ?
it is desirable to have clean response an octave or even two octaves above the XO frequency - depending on how sharp filters are used. The PTT8 can be crossed at say 1.5k and it has extremely low distortion and IMD well above.Directivity Index has been my issue with the Purifi drivers from the start. All of this excellent power response, impedance and distortion are great. Why are they advertising an 8" should be used up to 5khz? It makes no sense to me. I don't care if a circuit can correct the breakup modes, there won't be any reflections that high!
I meant how does the PTT8 sound in the 300 to 1300Hz range (approx) vs the PTT6.5 in the same range? My tweeter reaches to 1200Hz with low distortion and approx 80° dispersion so wondering if I would loose midrange quality if I crossed to a PTT8 instead of a 6.5.The midrange is 91db sensitive. It matches a pair of their woofers pretty well, and can be crossed up to 2khz for a decent on-axis. I still wish it was in their 5" frame, but there's a lot of good justification for it.