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InDIYana 2021; Loudspeaker DIY event...
- Thread starter Wolf
- Start date
Colonel7
Addicted to Fun and Learning
Wish I could go but covid has pinched $ this year. Will it be held same time next year? Thanks for putting it together.
Speedskater
Major Contributor
I think that May 2021 is several months early.
- Thread Starter
- #4
As of right now, this event is still scheduled for May 2021.
Annually, more often than not, it is held mid-April. We targeted later this year for feasibility due to Covid. Last year was just transplanted for this year.
Annually, more often than not, it is held mid-April. We targeted later this year for feasibility due to Covid. Last year was just transplanted for this year.
Skeptischism
Active Member
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- Sep 6, 2019
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have a great meet guys!! post lots of pics.
- Joined
- Nov 22, 2018
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The scale-model LX521 is hilarious! And beautifully done. Is its SPL very limited?
- Thread Starter
- #10
Surprisingly, not in that large room. We had entries level matched to ~79/80dB all day with -20dB Pink Noise, at the first row of chairs using RTA on Omnimic, or about 10' distance.
The columns/stands below are an MLTL loading for the dual ND91 push-pull pair that give bass into the 30s. They did the whole 3D soundstage really well, and you could tell where stuff was placed in the mix. John did a great job on the passive xover. BTW- He had SL's blessing to build these as a tribute, and they sound great!
The columns/stands below are an MLTL loading for the dual ND91 push-pull pair that give bass into the 30s. They did the whole 3D soundstage really well, and you could tell where stuff was placed in the mix. John did a great job on the passive xover. BTW- He had SL's blessing to build these as a tribute, and they sound great!
- Joined
- Sep 10, 2019
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Totally agree. I could put those in my room and tell everyone they're actually just really far away
Cool idea and nicely made.
Dang! I didn't realize this thread was here. I would've liked to have made the trip up to meet new folks and hang out. Maybe next year. :/
- Thread Starter
- #15
Meredith brought a single PS220, in the upfiring gray "pawn" you see there. Waveguided with BSC to sound the same via one speaker anywhere in the room. He used a mixer to combine left and right before the amp.
It sounded quite good, considering its foam and cardboard construction. He never fails to surprise me, and never disappoints.
The next one in, in case you didn't know that above was a speaker, was Dan Neubecker's new waveguide-omni design. He's been working on the scope of that design for on/off 12 years. I first saw conical waveguides. Then he was using compression driver waveguides from PE, and then they discontinued them. He eventually found enough to finish the project. As it sits, it has AE TD12H woofers upfiring from the bottom cab into the back of a 12" waveguide. The waveguide entrance is left open, and the front inside stuffed. This eliminated the cone breakup very well. The next section has a prosound B&C 6.5" as the midrange, firing at a convex cone in the same stuffed manner. The top was also rather novel. It had 2 tweeters, both variants of SB 29mm textile, with the front conventionally waveguided and the rear out of phase firing into the back of a waveguide. This yielded a cardioidal lobing pattern to give better imaging to the design. He did this as most omnis don't image very well.
While Dan says they were meant for smaller rooms to allow the tweeters to work properly, with a slight resistor tweak they sounded very good!
It sounded quite good, considering its foam and cardboard construction. He never fails to surprise me, and never disappoints.
The next one in, in case you didn't know that above was a speaker, was Dan Neubecker's new waveguide-omni design. He's been working on the scope of that design for on/off 12 years. I first saw conical waveguides. Then he was using compression driver waveguides from PE, and then they discontinued them. He eventually found enough to finish the project. As it sits, it has AE TD12H woofers upfiring from the bottom cab into the back of a 12" waveguide. The waveguide entrance is left open, and the front inside stuffed. This eliminated the cone breakup very well. The next section has a prosound B&C 6.5" as the midrange, firing at a convex cone in the same stuffed manner. The top was also rather novel. It had 2 tweeters, both variants of SB 29mm textile, with the front conventionally waveguided and the rear out of phase firing into the back of a waveguide. This yielded a cardioidal lobing pattern to give better imaging to the design. He did this as most omnis don't image very well.
While Dan says they were meant for smaller rooms to allow the tweeters to work properly, with a slight resistor tweak they sounded very good!
Thx very much! I meant the "pawn". Do you know if there is more info about construction somewhere?
Meredith Cargill
New Member
- Joined
- Jun 2, 2021
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Wolf, Thanks for the notice that Tomtoo is curious. And for the complimentary things you said about it. Having the chance to hear it after hours of listening to all the other speakers, I was pleasantly surprised at how good it sounded.
Tomtoo, I did produce a full write-up, but I have not posted it yet, probably at Parts Express Speaker Gallery.
It is, as Wolf said, a single driver, facing upward, with a deflector over it. Sealed rear chamber. Made of layers of MDF and Ram Board, with the driver's magnet held on a stalk of 3" PVC pipe.
Tomtoo, I did produce a full write-up, but I have not posted it yet, probably at Parts Express Speaker Gallery.
It is, as Wolf said, a single driver, facing upward, with a deflector over it. Sealed rear chamber. Made of layers of MDF and Ram Board, with the driver's magnet held on a stalk of 3" PVC pipe.
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