Value, thanks Ron: these are great looking and sounding speakers!
Geoff
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C-Note - Iron Driver Build
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ImageShack has dropped most of the images from this post so I've put them on Google Drive. https://drive.google.com/drive/folders/1NfusS6W4bf3lnJiKloNqlMdlwyNYWp2M?usp=sharing
Ron
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Re: C-Note - Iron Driver Build
I've re-tuned the port to around 36Hz and there's substantial improvement in the low end. The images are R-Carpenters original response measurements, the new near-field and port summed response and the new impedance.
The response looks a little better than the original design simulation.
The current port length is 5 5/8". The 1/2" Baltic birch cabinet external dimensions are 27 x 12 1/2 x 8. There was a small piece of 1/4" plywood behind the tweeter so there was something left to fasten the tweeter to after cutting the rebate. The port is 4"s from the bottom. The tweeter is 18"s from the bottom with the woofers evenly spaced above and below with an 8 1/2" center to center spacing.
These will be in Grinnell this weekend.
Ron
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Re: C-Note - Iron Driver Build
I forgot to mention that I rubbed the finish out with Pumice stone and then Rottenstone. http://www.woodcraft.com/product/200...e-4f-1-lb.aspx I make a slurry with Paraffin oil and rub the finish out with a piece of felt on a sanding block. I was looking for a video and ran across this short one on rubbing out oil finishes. http://www.youtube.com/watch?v=CAZ9I...eature=related
Ron
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Re: C-Note - Iron Driver Build
Originally posted by Ron_E View PostThe Tung oil will protect the wood all by itself. Yes, the product I used was an oil and stain mixture by Watco. http://www.rustoleum.com/CBGProduct.asp?pid=46 Our local Lowes stocks some. The Watco product says you can put Poly over the top if you wait 72 hours. I've used wipe-on and regular satin poly as a top coat. You can probably do the same with Tung oil. If you can't verify that's OK I'd do a test piece.
Ron
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Re: C-Note - Iron Driver Build
Originally posted by dcibel View PostRon, those looks great! I am just getting started with veneering, can you give some details of how you finished these speakers? I am starting by refinishing a pair of old Realistic speakers. See here. I have refinished these by simply sanding and rubbing Circa 1850 tung oil on them. I did 4 coats, rubbing 0000 Seel wool inbetween coats. They look great! Have a very nice sheen and good color. I want to protect the wood, so am thinking to do wipe-on polyurethane as well. I want to get it just right though, I'd hate to put anything on right now that makes the finish look worse.
By dark walnut danish oil, do you maen a pre-mixed oil and stain type of thing? I was thinking of using semi-gloss myself, but yours seem to have a bit of sheen with the satin finish.
Ron
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Re: C-Note - Iron Driver Build
I bet they sound as good as they look (awesome!), that's a great driver combo
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Re: C-Note - Iron Driver Build
Ron, those looks great! I am just getting started with veneering, can you give some details of how you finished these speakers? I am starting by refinishing a pair of old Realistic speakers. See here. I have refinished these by simply sanding and rubbing Circa 1850 tung oil on them. I did 4 coats, rubbing 0000 Seel wool inbetween coats. They look great! Have a very nice sheen and good color. I want to protect the wood, so am thinking to do wipe-on polyurethane as well. I want to get it just right though, I'd hate to put anything on right now that makes the finish look worse.
By dark walnut danish oil, do you maen a pre-mixed oil and stain type of thing? I was thinking of using semi-gloss myself, but yours seem to have a bit of sheen with the satin finish.
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Re: C-Note - Iron Driver Build
Originally posted by ROTECH View PostGreat job. Very nice cabinet work. And you painfully remind me that Veneer can and should be easier than paint, yet I still end up painting.
I guess its time for me to get a 1'' roundover bit too.Originally posted by [email protected] View Postreally nice ron. this make me a bit less afraid to try venneer.
Ron
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Re: C-Note - Iron Driver Build
Ron
As a participating member of the judging panel I must agree with Mike it was a "it was a game of inches". Your craftsmanship and design was impecable and when I saw them I said "I want them!". Love the veneer choice.
I will be building a set of Iron drivers as a momento of my trip to NYC and as of now yours are top runner. I will be listening to Mike Z's entry again after he has "completed" them (added in a zobel putting the price over $200/pair).
Thanks for making DIY-NY such a success
Randy Duck
ps Removable bottom... Who does that (I will from now on)? GREAT IDEA!!!
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Re: C-Note - Iron Driver Build
I liked them and in this contest the 9 entries were not far apart. The 200 price limit and the iron driver inclusion forced close competition.
Many times I found myself not being able to hear any differences from one speaker to the next.
It is also a real demo in how the internet can level many different playing fields in this case speaker design/building. The resources available to a diy guy/gal in this world are amazing.
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Re: C-Note - Iron Driver Build
really nice ron. this make me a bit less afraid to try venneer.
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