You have the option of using paper strips. Apply the glue to the edges with a paint brush and stick the paper to them. Then cut away the excess and lay a bead on top before placing the baffle. It's a little more work but I used this method (full sheets, and individual strips, with success.
Sorry, no pics of just the strips.
Sorry, no pics of just the strips.
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An article on the Cornu Spiral.
Spiral Functions for Horns – The Cornu Spiral – Sphericalhorns
Used in the example for a FLH, but probably useful for a more refined BLH as grace these many pages.
dave
Spiral Functions for Horns – The Cornu Spiral – Sphericalhorns
Used in the example for a FLH, but probably useful for a more refined BLH as grace these many pages.
dave
Update:
The front plate is glued on and I ran into my first major error...
I didn't leave enough room in the center to properly fit the bulky driver frame and rear that I had on hand. I also should have run my cabling differently.
It's a funny first time builder oversight that's for sure.
I decided to install the driver on the front exterior and add a couple panels of foam board to get it to be flush mounted but I didn't do it all that well so it's a bit rough
PS: Sorry the pictures aren't rotated correctly for easy viewing.
The front plate is glued on and I ran into my first major error...
I didn't leave enough room in the center to properly fit the bulky driver frame and rear that I had on hand. I also should have run my cabling differently.
It's a funny first time builder oversight that's for sure.
I decided to install the driver on the front exterior and add a couple panels of foam board to get it to be flush mounted but I didn't do it all that well so it's a bit rough
PS: Sorry the pictures aren't rotated correctly for easy viewing.
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What size driver is that? The way the scaling works is the base 28in one is good for 4in driver. That looks like a 5in driver? Your “tiled” look is actually interesting. It breaks up the boring flat front. Paint each one a different color and it would look like modern art. How does it sound?
The driver cone is 3.5.
The tiling is actually due to some issues I had with mounting. I was going to finish smoothing out the surface then make a cloth cover for it.
I realize the cabinet size is not ideal for the driver, I assumed I needed something like 26 inches based on what I saw in previous posts.
The cabinet size I used for this project was based only on the native width dimensions of the foam board panels that I got from the dollar store.
It sounds pretty good, though I'm wondering what it'd sound like if they were more dimension appropriate.
The tiling is actually due to some issues I had with mounting. I was going to finish smoothing out the surface then make a cloth cover for it.
I realize the cabinet size is not ideal for the driver, I assumed I needed something like 26 inches based on what I saw in previous posts.
The cabinet size I used for this project was based only on the native width dimensions of the foam board panels that I got from the dollar store.
It sounds pretty good, though I'm wondering what it'd sound like if they were more dimension appropriate.
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Hi Cal,
I’m not sure I ever understood your reasoning for doing this... is it to provide extra surface area for the glue to make a tight seal? Because the paper itself adds negligible thickness.
Hey V, Before the boy genius came up with the paperclip trick on the glue bottle he wanted to find a way to make the gluing faster. Since my hands are no longer rock steady, these paper strips are cut wider than the edge of the foam board so they provided a shelf for the glue. Since I use yellow glue and not white, I wanted to get the glue on as quickly as possible before it started to tack.
I found a pic. You can see here if you look closely that when I made Penthorn, I used strips on top. It was a hassle so on the 36" Cornu, I tried the full sheets and trimmed them after. Still a hassle.
I found a pic. You can see here if you look closely that when I made Penthorn, I used strips on top. It was a hassle so on the 36" Cornu, I tried the full sheets and trimmed them after. Still a hassle.
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Just curious if anyone completed a Cornu with the Mark Audio Alpair 10.3 drivers. I have an empty wall looking at me daily for something to hang on it. Any impressions on these drivers. I believe somewhere in this someone mentioned 36" square and 5" deep. Comments appreciated
I tried a pluvia 7 in one to replace some burned up tangbands. They sound much more detailed and refined in the mids and highs, base wasn't as strong, the TB's had more bounce. The pluvias were burned up also in short order. Life is tough in a college animal house. If you search you can find my build. Don't know where they are now, they didn't make it home when my son graduated.
By whom? This is called the Cornucopya for a reason. This is an old design that never got much airplay but is a heck of a fun build. It's not for critical listening, it's to make your friends eyes bug out.
Another Cornu update
I demoed the first one for the person that I was making these for and got good feedback, so I went ahead and built the second one.
The next plan is to cover it in galaxy printed cloth so it looks more like an art piece than a foam box on the wall.
They'll be paired with a polk ps110 subwoofer that I got broken and repaired.
I demoed the first one for the person that I was making these for and got good feedback, so I went ahead and built the second one.
The next plan is to cover it in galaxy printed cloth so it looks more like an art piece than a foam box on the wall.
They'll be paired with a polk ps110 subwoofer that I got broken and repaired.
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Those look great. I would upgrade your amp though. Get a TDA8932 PBTL - super bass with a 19v laptop brick. You need two as they are mono blocks. You can share the PSU though.
35W TDA8932 Mono Amplifier Board | eBay
35W TDA8932 Mono Amplifier Board | eBay
The planet10 modified 5.25" RS-1354 was a huge hit in the 36". The bass was staggering and lacked the mid bass hump of the 27".
It's not the best driver used in these horns but it was definitely the best cabinet for these drivers I've ever heard.
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You can save yourself some typing next time and call it a coaxial or just a coax. We'll know what you mean.
That might work in the 36" but I'd be inclined to go bigger. Maybe 42" or 48". Worked well for the Airborne 6.5" wood cones.
