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Bayz'd & Confused - New Project
After my first Axpona, I had mentioned to Ben on the drive home that it would be interesting to duplicate the Bayz speakers with PVC for a DIY project.
Never got around to it but the idea has been in the back of my head since. Then last year at SDC Andrew Jones scored my creativity pretty darn harshly. Apparently putting speakers in a square box just isn't creative enough for a guy who designs his own coaxial. So what the hell; he wants creative, let's get creative.
I have no idea if or how well this is actually going to work. If it sucks I'm only out $8 of PVC. If it does work, however, this will actually work out great in my gym. I wander around a 12' wide area where my gym is set up in my basement. Having omni speakers so the sound doesn't change much as I moved around horizontally in the space would actually be a benefit. So if they do well, that's where they'll live.
Not at the scale of the Bayz because PVC that size is expensive, and I'm cheap.
It's about 20" tall and 16" deep. The enclosure is 1.55L sealed. The midrange drivers are spaced 6" apart at their face, which should get me within one wavelength at 2250hz. Midrange are TC9's, one will be mounted in each reducer. Tweeters will be NE25's, one per speaker mounted centrally between the TC9's facing up. I have some wood cones coming from Amazon I'm going to try to use an inverse waveguide for the tweeters. I figured the NE25 would work well because the rear chamber is cone shaped already to aid with deflecting the soundwave from the bottom speaker.
I have a few options and ideas for the midbass, but haven't made any final decisions yet. First we'll see if this even works because if not, no sense in going any further.
I may try these for the theme at InDIYana. Eliminate the tweeter and use the wood cones for inverted waveguides on the TC9's. The enclosure volume being small controls excursion well. F3 of 147hz and at 50w they don't exceed Xmax anywhere in the spectrum according to WinISD.
Comments
Unfortunately, the 2025 theme limits the widerange to a single unit, no multiples.
Otherwise, I applaud your cheapness and creativity. Carry on!
InDIYana Event Website
Ah shoot, it'd been a while since I'd read the rules. No biggie
Throw a lowpass on one of them. Then it is only 1 widebander.
The original desigh appeares to be two MLTLs? one per woofer.
Held together with tape, hot glue, hopes and dreams, I was able to get some starting measurements tonight.
With the 360 degree horizontal off axis energy the mids throw out, my impulse response was a bit of a mess. This is with a 2ms gate, which I know is very short but it seems to weed out a lot of the noise to get an idea of what the speakers are actually doing. I could probably work with this. 0 - 90deg horizontal
The tweeter however, not so much....0deg and 90deg horizontal. Clearly my plan of a 1.25" wood cone for dispersion was not nearly enough. Need to find someone with a 3D printer who can print me a reverse waveguide. Also will need to more solidly mount the tweeter. I didn't think it would have enough excursion to matter, but it buzzed like crazy under 1khz.
I have some skills that might be of use. Send me a PM if you want help on a 3d design and print.
Place a stuffed pickle ball between them. Then you get absorptive and reflective influences. Should be big enough diameter. Might have one handy if you want to try it....
InDIYana Event Website