Hi,
Yes, the real problem is to find the best compromise between all the possible solutions. And there are still a lot of things to write...
About this project, the box with the curved side is nice.
Wait and see the evolution of this project. This one is interesting because the driver is a hard cone. Hard cones are interesting to use because they are excellent in the pistonic range but out of range, it could be a nightmare. Imagine a sound with super clean parts and some dirty parts. The tuning can take a lot of time. All things come at a price...
Cheers.
So, this has turned almost completely 180 degrees. While looking around for tweeters better than the XT25 for this application, I fell in love with the B&G Neo 3 PDR, which I ordered yesterday, in the OEM version with larger back cups.
The salesperson I spoke with had lots of very grumpy things to say about the Dayton RS180.
So, now that I have B&G Neo3 tweeters on their way, I've realized that this project could very quickly morph into a ZX Spectrum, with a very slightly different crossover (I don't want to order 6.8uf caps when I have 7uf sitting in my bin!) and slightly less BSC because I'm using a much smaller, sloped side cabinet than Paul's Spectrum (am I thinking about this correctly?)
Maybe a topic change is in order!
The salesperson I spoke with had lots of very grumpy things to say about the Dayton RS180.
So, now that I have B&G Neo3 tweeters on their way, I've realized that this project could very quickly morph into a ZX Spectrum, with a very slightly different crossover (I don't want to order 6.8uf caps when I have 7uf sitting in my bin!) and slightly less BSC because I'm using a much smaller, sloped side cabinet than Paul's Spectrum (am I thinking about this correctly?)
Maybe a topic change is in order!
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Of course GR Research had nothing good to say about the RS180. It's not their driver and they want you to use their "custom" Peerless drivers. I'm sure they already know that the RS180 is twice the driver of any of their offerings, hence why they bashed the RS180. Don't pay any attention to them.
Personally, since they worked side by side with AV123, I wouldn't deal with them anyway. And if I knew back then what I know now about AV123, I certainly wouldn't have bought their speakers (X-Statik's).
My point is, don't let them or anyone else discourage you from using the RS180 drivers or doing this build. Just know how to avoid those nasty 3kHz, 6kHz and 9kHz peaks of the RS180 and you'll be fine.
And sorry for the little "rant". My apologies.
And sorry for the little "rant". My apologies.
Oh, no, I appreciate every bit on input on drivers I've never heard. I suspected that some of his hatred for the driver was because they had their own offering (an india manufactured driver I'd never seen), but it was enough to keep me from pushing the button on that order for the moment so that I could do more research.
I've got the tweeters coming, which I think I might have to do a little listening on anyway because of the back cup difference.
I don't understand why you went to them for the tweeters anyway. You could have just as easily gotten them at Parts Express.
Bohlender Graebener Neo3W Planar Tweeter w/Back Cup
Hi,
GR Research are obviously pointlessly going to bash other drivers.
Well I say obviously, only because of the grief they gave Zaph
when he had the temerity to realistically comment on their stuff.
BSC amounts relate to placement, basically baffle width determines
the frequency transition point, the cabinet does not define BSC.
rgds, sreten.
GR Research are obviously pointlessly going to bash other drivers.
Well I say obviously, only because of the grief they gave Zaph
when he had the temerity to realistically comment on their stuff.
BSC amounts relate to placement, basically baffle width determines
the frequency transition point, the cabinet does not define BSC.
rgds, sreten.
Hi,
Generally yes, but it would not apply to e.g. a square baflle.
A typical bass/mid placement, baffle width dominates.
rgds, sreten.
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Whenever I get around to doing another speaker build, it's going to be based off of my current design (8" woofer and small fullrange driver), yet closely mimic the large "AN-E" bookshelf speakers from Audio Note, even incorporating their hemp 8" drivers, possibly two per channel. This means they'll not only be close to 40" tall, but they're going to be fairly wide as well, about 14" or so.
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Joined 2009
The idea behind curved cabinets is that they help reduce standing waves. Parallel walls trap waves to bounce back and forth thus creating the worst case scenario for standing waves. To be honest though, I can't hear a difference between curved and straight wall boxes.
I used the curved cabinets from Prats Express. I think they are very well built I recommend them. They are somewhat deeper than what I expected so if you are thinking about it, make sure you the dimensions satisfy you.
Those look like a decent speaker...did they do that crazy audio note thing with hand-wound pure silver coils and stuff?
This one looks almost exactly the size I'm planning on making.
Dayton TWC-0.75BK 0.75 ft³ 2-Way Curved Cabinet Gloss Black
I'm trying to figure out the best way to get the curves right, I'm trying to find a template I can print and trace but I can't find one that's the right size.
Hi,
Not really. The fundamental principle is that curving makes the walls vertically
far stiffer. Changes in cabinet resonances dominate, not standing waves.
rgds, sreten.
I'm planning on using layers and putting 5/8ths thread rods to hold them together along with glue, 2 on each front corner and 1 in the back.
Hmmm........
FWIW basic curved cabinets are made by a different process,
look here : Zaph|Audio
Nothing wrong with a labour intensive stacked cabinet, but
it would be a shame not to optimize the stacking profile.
rgds, sreten.
I thought about that idea of scoring and bending but I was worried that I wouldn't be able to fold far enough without breaking. It seems as though Zaph was able to fold pretty far!
That might be a good idea, too.
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