@metzb1 Hey there, nice looking project. I considered that Celestion CD too.
@bwaslo I pretty much bought my table saw for the purpose of building these, but it will get a lot of use for other projects. I went with a Hitachi (now Metabo) jobsite saw, the C10RJS. Very nice rack and pinion fence. Also the soft start and motor break when stopping are great.
BTW, I have no idea yet what to do for the bass, I need to get down to around 50 or 60 where the tapped horn sub takes over. I hate the thought of cutting 4 big ports in that nice birch plywood of my horn to make it a 3-way. I may end up just building a big ported box with a good 15" like a FaitalPro 15PR400 that the guy over at Humble Home Hifi used in the "Calpamos" design.
Hooking up a quick and dirty crossover to give it a listen, report soon...
@bwaslo I pretty much bought my table saw for the purpose of building these, but it will get a lot of use for other projects. I went with a Hitachi (now Metabo) jobsite saw, the C10RJS. Very nice rack and pinion fence. Also the soft start and motor break when stopping are great.
BTW, I have no idea yet what to do for the bass, I need to get down to around 50 or 60 where the tapped horn sub takes over. I hate the thought of cutting 4 big ports in that nice birch plywood of my horn to make it a 3-way. I may end up just building a big ported box with a good 15" like a FaitalPro 15PR400 that the guy over at Humble Home Hifi used in the "Calpamos" design.
Hooking up a quick and dirty crossover to give it a listen, report soon...
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Ok. So, these synergy horns are really something else aren't they? I listened to a bunch of different stuff on the 1 horn for about 2 hours, including some mono recordings of the Beatles and I'm hearing things I haven't ever before. They have a crazy ability to separate the details in a dense mix. Even with the tonal balance way off since this is not a real crossover yet. Just a few caps to protect the drivers, and a few resistors to try and even out the mid/tweeter levels. Now I can't wait to finish the second horn!
Some progress to report. Both horns functionally finished, I haven't built outer enclosures for them yet. Even though the sound is amazing, I am still not satisfied with the crossover, I have been through about 10 versions of the mid-tweeter crossover. The BMS tweeter is proving to be very difficult to level out and mate with the mid response. I'm thinking about trying the FaitalPro HF10AK.
Since I am still undecided what mid bass design to build, I temporarily have them crossed over at about 325 to my main speakers (JSE Infinite Slope 1's) for mid bass. Using a mini DSP 2x4 HD and a separate amp for the JSE's so I can equalize and match the level to the synergy's. What mid bass design would you use to go with these to cover from about 50 or 60 Hz up to the horns around 325 Hz? BTW, the horns are 27" wide by 17" high.
Since I am still undecided what mid bass design to build, I temporarily have them crossed over at about 325 to my main speakers (JSE Infinite Slope 1's) for mid bass. Using a mini DSP 2x4 HD and a separate amp for the JSE's so I can equalize and match the level to the synergy's. What mid bass design would you use to go with these to cover from about 50 or 60 Hz up to the horns around 325 Hz? BTW, the horns are 27" wide by 17" high.
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Others with more experience can chime in but I’m not sure you should be mounting foil/metalized capacitors in the core of air-core inductors. The presence of metal in the core of an inductor can change its inductance. Not sure if the magnetic flux of the inductor will do much to the electrical field in the capacitor but it’s probably not helping the caps either.
Brinkman, thanks for noticing that detail. That was in an earlier version, I don't have any caps inside air core inductors now and would not finalize the build that way. It was just a quick way to solder the parts together and test the effect. It was a resonant peak compensator so not in the direct signal path.
What design for mid-bass would you use to go with a synergy horn like this? Hoping to get some suggestions before moving forward. Thanks!
Good looking horns! Here is a nice way to implement the midbass https://www.diyaudio.com/forums/multi-way/324097-synergy-build-tf0410mr-mids-2.html#post5501378
Well, in theory it would be a large woofer array to get efficiency up to the horn's, though if just sizing for a ~325 Hz HF corner, then a ~33.692 cm dia./891.54 cm^2 [Sd] driver/channel, so a <35 Hz Fs 15-18" in a sealed cab.
GM
GM
Hey tmuikku, thanks. I actually found your build thread before I built my horns and like your solution, I might have to give it a try. How is the mid-bass quality, does it keep up with the dynamics of the synergy?
Thanks for the suggestion. I'll definitely build a pair with the second expansion eventually. I left it out on these partly because I wanted to minimize size and, honestly, because I wanted to finish the horns faster and see what it sounded like. I've got 42 more Gentos to use up! 😀