How did you calculate the transition from square to round? What size is the square hole and what size is the round part?
Transition is based off of CAD files from another builder on reddit, it's essentially the same profile as the 3d printed version from jennygirl, but split in two, and in alloy(obvs).
From fusion, square is 1.7 x 2.4 and round hole is sized at 1.4" to suit the CD used.
PM me and I'll send you step files, the profile is quite hard to describe/dimension
From fusion, square is 1.7 x 2.4 and round hole is sized at 1.4" to suit the CD used.
PM me and I'll send you step files, the profile is quite hard to describe/dimension
Well here we are. I'm about 4 weeks out from the first show I'm doing with my SyntripPs, and a bunch of gigs lined up for them after that. They are as "done" as they are going to get for now. I'll likely take them apart and finish the exterior in may with alloy trim and mahogany veneer.
Even in this acoustically horrible basement rave cave and without the horn extenders they sound great. Full test with both subs and extenders this sunday 😊😊😊
Thanks again to Art and everyone else who's contributed to the brain trust on these wonderful speakers!
Even in this acoustically horrible basement rave cave and without the horn extenders they sound great. Full test with both subs and extenders this sunday 😊😊😊
Thanks again to Art and everyone else who's contributed to the brain trust on these wonderful speakers!
so does the secondary flare make a difference sonically?
nice high gloss finish, i'm just not a fan of the color.... and yes as a personal preference if it was a darker tone like crimson so that at low light levels it just kind of fades out of view i'd be all about it, i once worked with a white three way PA and keeping clean looking was a challenge....
nice high gloss finish, i'm just not a fan of the color.... and yes as a personal preference if it was a darker tone like crimson so that at low light levels it just kind of fades out of view i'd be all about it, i once worked with a white three way PA and keeping clean looking was a challenge....
Last edited:
The secondary flare:
*increases horn length improving loading
*reduces 'waist banding' wherby the mouth diffraction narrows the midband dispersion of conical horns
*causes the horn to have a larger mouth resulting in lower freqeucy pattern control
This is not the Syntripp horn but a simulation comparision of a flared and non flared horn where the horn length is kept constant (so the flared horn has a larger mouth):
The only metric plans submitted to me had errors which were never corrected.
You might check out this site:
https://drive.google.com/drive/folders/1FnN2bpVMVgbMgDMlPyuUvxoIwGOGNEtd
Hey Art, (and everyone). I will be sending you my bilingual(metric and imperial) plans for the syntripPs for review at some point, probably mid-may as I have a whole bunch of gigs coming up, and prepping those is absolutely eating away at my spare time. I really don't want to release any drawings without the okay from Art.
subjectively, they sound a ton better with the secondary horns on. I did a test this weekend of my hot rodded DML-2181s(loaded with 18tbx100s) at open gain, with a syntripP on top of course, and since it was a quick test, didn't attach the secondary horn. compared to the last test, with secondary horns on, the sound is way way better. I will certainly not be gigging the syntripPs without the secondary flares.
holy crap huge space how did it sound?
did the reverb in there intrude on the direct coverage of the Syntrips or what?
did the reverb in there intrude on the direct coverage of the Syntrips or what?
With some P&D on the back wall, and the pattern control horns mounted, not at all. Crisp clean clear direct coverage over the entire 40x60' dancefloor with insane levels of pattern control and rear rejection. Huge soundstage in front and a super easy system to listen to You can talk at a normal level behind them and they're LOUD at in front. Super quiet dj booth with very very little bleed from the mains.
I'm blown away that I built something myself in a few months that sounds so lovely. These ones are most definitely keepers. Follow along as I modify them to squeeze another 6ish db out of them.
Another 6dB output would require the 10" Xmax to be doubled from 6mm to 12mm, which would also require four times the power.
What modification do you have in mind?
FaitalPro 10FH500 or one of the other drivers in that neo motor family, and a 3mm spacer on the front of the woofer to give more clearance for the cone. I'll grab a second PL218 and bridge them, gives me 1800W each. The faitals handle 500AES each so obviously good limiting is absolutely essential. Might need to reshape the phase plugs as well or simply redesign them to account for the extra volume moving the woofer out by 3mm gives. If I can get 6db I'd be thrilled, but I'd even settle for 3-4.
After that, a RCF ND840 or eminence 314X cd as well so we have more headroom to spare in the cd.
Increasing the Vtc (volume of throat chamber) will lower the acoustic bandpass of the 10", requiring more output from the HF driver at the acoustic crossover point.
The FaitalPro 10FH500 has 7.5mm Xmax, 12.5mm Xlim. The difference in power handling will allow more average (limited) level, but the additional 1.5mm Xmax won't give more than 2dB increase at the low end, where the SynTripP has the least output potential.
There are no 3" diaphragm HF drivers with more than 0.5mm excursion that I'm aware of.
The low end excursion of the HF driver is it's output limitation in the SynTripP design, a higher power handling driver will still be displacement limited.
If you would like an easy 6dB more output in a similar package size, I'd suggest eliminating the excursion limitations imposed by the two-way design, and scaling up to higher excursion 12", and using four 4" B&C 4NDF34 for midrange.
Cheers,
Art
Yeah, I have a 3d printer so well definitely need to change the shape of the phase plugs to keep vtc the same. That's a relatively easy task tbh. I'll have to look into 3" VC options, but let's bump up the low end first
That's definitely the longer term goal! I'm looking at building some uhhhh SH96 size beasts next season, it's more what stopgap measure can get me some extra headroom until I can start work on BIG synergy 🤣