Nice job. I can make out Eminence on the woofer. Is your midrange also Eminence?
Too, did you select drivers with similar efficiency and QTS., and do you hear any anomalies from centring your drivers in their baffles?
Woofer looks like SB Audience
https://www.sbaudience.com/index.php/products/open-baffle-drivers/bianco-15ob350/
Midrange seems to be a Celestion Blue guitar unit
https://www.sbaudience.com/index.php/products/open-baffle-drivers/bianco-15ob350/
Midrange seems to be a Celestion Blue guitar unit
Hi
it is inspired from bastanis and some imagination
it’s 30mm oak
celestion alnico blue 15
faital pro hf 108
sb audience 15ob350
amp Sony Vfet pt2
pre korg b1
earthquake sound ba-550
it is inspired from bastanis and some imagination
it’s 30mm oak
celestion alnico blue 15
faital pro hf 108
sb audience 15ob350
amp Sony Vfet pt2
pre korg b1
earthquake sound ba-550
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Yes with similar efficiency, celestion is 100db, fatal tweeter is 108db,
there is no anaomalies, not what i can hear
Did you remove the back to make it bi-directional?
I guess that if you remove the chamber it's a lot less
Nicely done Antealta. I would use square baffels, since i am square 🙂 Just kidding...to minimize edge diffraction. Circle has has equal distance from centre, which results in biggest dips.
Multiway crossovers lowpass must be set below dipole on-axis cancellation dip. Then just some more eq for higher drivers low end.
Robust nordic design ... I like it! And by the way: Nice socks also!
True. But then the optical charme of this design gets lost. It's not straightforward to find a really appealing compromise in terms of both acoustics and optics, and lot's of iterations may make you merrily go round in circles... But this is what a hobby may stand for?
As for me and in terms of baffle edge diffraction effects, let me re-iterate my oldies-but-goodies-examples of my early dipole adventures. In one of these iterative series, I experimented with some helicoid contours to optimize the spread of edge diffraction effects for the one, most critical single driver in terms of baffle diffracion. Retrospectively critisizing this approach, I admit that sometimes I enthousisasticly optimized for the wrong "most critcal" driver. Today my choices might be different. I also experimentally additionaly perforated some baffles for a partial, preliminary pressure compensation between the front and the back of the baffle. This approach worked quite well to influence on a single early single peaking region of the impulse response.
And while doing so, as usual it is useful to make some granted anechoic free-field measurements on every iteration. You may use sine sweeps instead of chirps. In this case to avoid any interference with birds chirps.
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I'll take the above post as a yes, then. 🤣
Also, the 109 dB @1m spec on the HF108 assumes it is mounted on a 50 degree by 40 degree horn.
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thanks
i haven't measured them yet ,it is a little less bass compared to my test build, but just turn up the volume on bass amp
Thanks
Yes need warm socks😂.the winter is not letting go
the design idea,is so they float, The speaker ,not the socks😂
Hey I like what you did to the celestion can you explain where you get the phase plug and what material you use and the little felt pads where you get them from and the coating on them what is it damar would like to know if you don't mind
Damar is a laquer, it dries stiff. It does have an intoxicating smell.
You have to watch the damar… too much and the driver is ruined. I only ever used it for quite specialized purposes.
If you ar egoing to treat a paper cone something that remains flexible like puzzlekoat/mod podge is a better choice IMO.
dave
You have to watch the damar… too much and the driver is ruined. I only ever used it for quite specialized purposes.
If you ar egoing to treat a paper cone something that remains flexible like puzzlekoat/mod podge is a better choice IMO.
dave
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i have made the phase with a woodturning machine,it's spruce, the felt pads is just furniture pads and the cone is treated/dopped with JOHA oil varnish
I know about the damar I'm just curious if that's what he used I know modpodge because I used it before but thanks for the reply but I also wanted to know how low he got the compression driver playing from and was wondering how low can it really play on thar small horn or is it limited