Great thread!
I own a pair of Edgarhorn Slimline speakers with upgrades like huge oil filled mil surplus caps, foil inductors and Fostex super tweeters and love them but been in storage 10 years, never going to have a place to use them again so likely sell them when I dig them out hopefully this year. I bought them directly from Dr Edgar at the shop he used inside Image Dynamics where I went often when competing in SQ car audio competition. Bruce was a great guy and I considered him a friend so it will be hard to let them go, they were his demo pair.. I also have a spare pair of the JBL mid drivers and the Pioneer woofers in storage.
I always wanted the Titans but just never had the right space for them but still love the Slimline speakers.
I have read all I could find on Dr Edgar and the Tactrix horn but learned something more on this thread which means a lot to me, thanks! I did know he was giving the plans, etc from Voigt's wife except I did not know it was Voigt, another cool bit to learn about.
The Voigt's would be really fun to see in a retro home setup!
Thanks for the great thread!
Rick
I own a pair of Edgarhorn Slimline speakers with upgrades like huge oil filled mil surplus caps, foil inductors and Fostex super tweeters and love them but been in storage 10 years, never going to have a place to use them again so likely sell them when I dig them out hopefully this year. I bought them directly from Dr Edgar at the shop he used inside Image Dynamics where I went often when competing in SQ car audio competition. Bruce was a great guy and I considered him a friend so it will be hard to let them go, they were his demo pair.. I also have a spare pair of the JBL mid drivers and the Pioneer woofers in storage.
I always wanted the Titans but just never had the right space for them but still love the Slimline speakers.
I have read all I could find on Dr Edgar and the Tactrix horn but learned something more on this thread which means a lot to me, thanks! I did know he was giving the plans, etc from Voigt's wife except I did not know it was Voigt, another cool bit to learn about.
The Voigt's would be really fun to see in a retro home setup!
Thanks for the great thread!
Rick
Glad you like it! Bruce Edgar was a giant and I admire his work. So nice to hear from someone who was closer to him.
He was not in great shape so whenever I was there I helped him as much as I could but usually I was there after hours and weekends. It was a 100 mile drive each way and at least one time worked through the night just to work with Matt Bogart and learn from one of the all time car audio masters. Bruce was very kind and just full of life even if he moved slowly, quick to smile, quick to say thanks.
When my son and I were living in far Northern CA I took him to CES in Vegas and we went to Alexis Park (pretty sure that is the name) to check out all the home audio vendors booths. A motel room not being the best place to addition audio gear though some were setup better than others and some high end setups were just plain terrible. After listening to quite a few my son, who was 18 and had not heard high end home audio yet but had heard some of the best SQ car audio systems even built stated he liked our system in our Tacoma better than anything at the show and I agreed.
Then I took him to see Dr Edgars room with the Titans and the huge sub that went with them, he was blown away and it was easily the best system we heard at the show, by far. When we walked in my son was surprised when Doc saw me and came to give me a big hug🙂
That was when I knew I just had to have some Edgarhorns but did not have room for the Titans at home, a rental. We then moved to Utah and I had more room but was blowing all my money on building race cars, which was great fun but I regret most of it now.
--------------
I just read the interview articles, whew, learned a huge amount doing so, some parts not easy as I was a high level tech but not an engineer!
Thanks again for the great thread!
Rick
When my son and I were living in far Northern CA I took him to CES in Vegas and we went to Alexis Park (pretty sure that is the name) to check out all the home audio vendors booths. A motel room not being the best place to addition audio gear though some were setup better than others and some high end setups were just plain terrible. After listening to quite a few my son, who was 18 and had not heard high end home audio yet but had heard some of the best SQ car audio systems even built stated he liked our system in our Tacoma better than anything at the show and I agreed.
Then I took him to see Dr Edgars room with the Titans and the huge sub that went with them, he was blown away and it was easily the best system we heard at the show, by far. When we walked in my son was surprised when Doc saw me and came to give me a big hug🙂
That was when I knew I just had to have some Edgarhorns but did not have room for the Titans at home, a rental. We then moved to Utah and I had more room but was blowing all my money on building race cars, which was great fun but I regret most of it now.
--------------
I just read the interview articles, whew, learned a huge amount doing so, some parts not easy as I was a high level tech but not an engineer!
Thanks again for the great thread!
Rick
I was building a car project around 12 years ago, or a bit longer, a C5 Z06 vette chassis stretched 16" with a 1953 2 door Studebaker coupe body. Tiny little stock dashboard and deep foot wells left room enough that I was going to have Doc and Eric Stevens of ID, Matt as well, help me design huge horns for under the dash and back into deep foot well recesses behind steel foot panels we could remove. Also in the plans were not so deep a design on the horns if I needed to add a mid which I was looking at least 8" but up to 10" drivers.
I was going to remove the fuel tanks behind the seats and put in two 21" pro audio subs Eric was going to rewind for my needs, infinite baffle into the trunk when the floor of would be mounted a fuel cell.
This was to be a street/track car, fully caged, fire system, had a forged LS that made 600HP on pump gas and was build to handle boost up to at least 1,100 HP if I wished. 12" wide front, 13" wide rear wheels with just slightly rolled rear fenders.
Paint just silver, everywhere, no trim, exhaust tucked up so not seen but have fuel injectors near the tips for some added fun.
I was just about to section the frame, had the body on the lift ready to drop down and start fitment once frame was done.
Anyway, things happened outside my control so I decided to sell off the project but it would of been one heck of a horn car!
------
I have installed ID horns in a Duramax truck and a C5 Vette and a few others.
Rick
I was going to remove the fuel tanks behind the seats and put in two 21" pro audio subs Eric was going to rewind for my needs, infinite baffle into the trunk when the floor of would be mounted a fuel cell.
This was to be a street/track car, fully caged, fire system, had a forged LS that made 600HP on pump gas and was build to handle boost up to at least 1,100 HP if I wished. 12" wide front, 13" wide rear wheels with just slightly rolled rear fenders.
Paint just silver, everywhere, no trim, exhaust tucked up so not seen but have fuel injectors near the tips for some added fun.
I was just about to section the frame, had the body on the lift ready to drop down and start fitment once frame was done.
Anyway, things happened outside my control so I decided to sell off the project but it would of been one heck of a horn car!
------
I have installed ID horns in a Duramax truck and a C5 Vette and a few others.
Rick
The reflector is poured concrete, and should reach the bottom edge of the baffle cut out. The extreme start of the horn, indeed. But that wasn't what I was uncertain about. Where to mount the driver over the baffle cut out? Centered at the middle of its height? That's what I would automatically guess anyway. And it would probably be fine like that.
But the baffle cut out/throat is shaped rather typically, which I assume is deliberate. The cut out is basically the radiating surface into the horn. Its triangular shape seems to be intended to limit/direct sound radiation (to an extent) towards the triangular reflector). I wanted to know how the driver would originally sit in front of the cut out. Obviously, there is more treble coming off the center/whizzer of the driver. I think Voigt will have deliberately placed the driver in relation to the reflector.
I know, caught up in little details that may not matter much.
Anyway, I have seen several images of the driver in a home constructor's horn, the domestic corner horn and, apparently, the Lowther PW1 and PW2 horn. I also read some observations from owners and people who have seen these enclosures up close. According to those sources, the driver was standing on the ground (in case of the bare home constructor's horn without bass chamber) or on a panel inside the horn, simply slid up to the horn. Not screwed or bolted. A thick layer of felt forms a gasket/seal. Because the original drivers have a square frame and the size of said frame is known, I know where the center of that square is, and therefore the center of the driver.
I just drew out the baffle cut out on a piece of cardboard and located the center of the driver. It was a messy, messy process. I didn't take my time to think it through and had to start over a few times. I'll make a neat drawing at some point in this thread and will mark the center of the drive unit clearly, and why. Make it easier for future driver swapping.
Also, the driver is obviously circular and the baffle cut out isn't. So the driver doesn't cover the cut out. I guess I can mount the driver on a square panel and mount that to the baffle.
But the baffle cut out/throat is shaped rather typically, which I assume is deliberate. The cut out is basically the radiating surface into the horn. Its triangular shape seems to be intended to limit/direct sound radiation (to an extent) towards the triangular reflector). I wanted to know how the driver would originally sit in front of the cut out. Obviously, there is more treble coming off the center/whizzer of the driver. I think Voigt will have deliberately placed the driver in relation to the reflector.
I know, caught up in little details that may not matter much.
Anyway, I have seen several images of the driver in a home constructor's horn, the domestic corner horn and, apparently, the Lowther PW1 and PW2 horn. I also read some observations from owners and people who have seen these enclosures up close. According to those sources, the driver was standing on the ground (in case of the bare home constructor's horn without bass chamber) or on a panel inside the horn, simply slid up to the horn. Not screwed or bolted. A thick layer of felt forms a gasket/seal. Because the original drivers have a square frame and the size of said frame is known, I know where the center of that square is, and therefore the center of the driver.
I just drew out the baffle cut out on a piece of cardboard and located the center of the driver. It was a messy, messy process. I didn't take my time to think it through and had to start over a few times. I'll make a neat drawing at some point in this thread and will mark the center of the drive unit clearly, and why. Make it easier for future driver swapping.
Also, the driver is obviously circular and the baffle cut out isn't. So the driver doesn't cover the cut out. I guess I can mount the driver on a square panel and mount that to the baffle.
This is my process at the moment. I get lost in my own handwriting and erroneous measurements, but it's getting there.
Oh, and the drivers have arrived. It feels like a classic fullrange driver, built very well. Surprisingly heavy for a relatively small drive unit. I'm looking forward to hearing it in the horn
Starting to draw it out. I have the straight side panels already laid out. I used a bendy ruler to "connect the dots" for the curved lines and that turned out nice. But no pics. I am rusty with documenting a build.
Here I laid out the throat/baffle. It's hard, for my burnt out brain. I have rulers and straight edges that are in metric and imperial, and somehow this helps and it doesn't. I am enjoying that this is a quick test build, so I just check and correct until it's symmetrical etc. If I want to do a very nice build, I'll probably draw it on a computer and print it out to scale.
Material used is called triplex, it's ply but with just 3 layers, regardless of thickness. It's lighter than birch ply, but also costs just half and it is very resistant to warping. And it looks pretty nice. It's pretty ideal prototyping material.
I'll have to see when I have time to start cutting and glueing. Now is really not the time (getting keys for the new house on Tuesday, yikes), but it is incredibly relaxing to have a side project to distract from all the work that's coming my way. 😉
Here I laid out the throat/baffle. It's hard, for my burnt out brain. I have rulers and straight edges that are in metric and imperial, and somehow this helps and it doesn't. I am enjoying that this is a quick test build, so I just check and correct until it's symmetrical etc. If I want to do a very nice build, I'll probably draw it on a computer and print it out to scale.
Material used is called triplex, it's ply but with just 3 layers, regardless of thickness. It's lighter than birch ply, but also costs just half and it is very resistant to warping. And it looks pretty nice. It's pretty ideal prototyping material.
I'll have to see when I have time to start cutting and glueing. Now is really not the time (getting keys for the new house on Tuesday, yikes), but it is incredibly relaxing to have a side project to distract from all the work that's coming my way. 😉
First glue, even. This is just the horn, not the reflector above it. That will be a separate "hat" to the horn. It's bigger than I expected, but overall pretty small compared to your average corner horn. 😜
So this is how I have been progressing. I fixed the bottom of the curved panel to the bottom of the straight sides. Then I pushed the thin (3.6mm) ply against the sides a bit and traced that length with a thin marker. I took it off and cut the line with a semi-circular multitool bit, which is SURPRISINGLY good for cutting controlled free-hand curves.
After a while, pushing it flush with my hands wasn't sufficient anymore, just too long and the places where I didn't have a finger pushing didn't meet the sides anymore. So from then on, I used masking tape where I had already cut the curve.
The standard size panels I use are a bit too narrow, and the curved panel was curving in a bit, so there's a patch to extend the width on top, and a beam... Beamlette? Slat? Across the width of the edge. It glued up nicely, it's strong and the transition inside the horn is smooth.
After a while, pushing it flush with my hands wasn't sufficient anymore, just too long and the places where I didn't have a finger pushing didn't meet the sides anymore. So from then on, I used masking tape where I had already cut the curve.
The standard size panels I use are a bit too narrow, and the curved panel was curving in a bit, so there's a patch to extend the width on top, and a beam... Beamlette? Slat? Across the width of the edge. It glued up nicely, it's strong and the transition inside the horn is smooth.
Attachments
I finished cutting it. It's a bit rough, it will be trimmed and smoothed in some way when it's glued up.
My preferred prototyping play bends OK at 3.6mm but not the prescribed u
7mm ply. I plan to glue this layer on and then doubling it up. Probably glueing the first section (a bit higher than the driver circumference outlined on the ply here) to ensure that's nicely flat, dripping with glue and clamped effectively.
Perhaps I get really impatient and just double up the first bit and see how it sounds then. 😉
I have a strategy for the simple curved reflector in this design ready. But, you know how it goes. The pretty dual radial curve is attractive as well and becoming an intrusive thought.
There's little sound in our new house at the moment, might be nice to quickly finish this thing and drag it over. Music during home improvement. It would beat a Bluetooth speaker by a good margin, even if only because I made it and Voigt designed it. 😎
My preferred prototyping play bends OK at 3.6mm but not the prescribed u
7mm ply. I plan to glue this layer on and then doubling it up. Probably glueing the first section (a bit higher than the driver circumference outlined on the ply here) to ensure that's nicely flat, dripping with glue and clamped effectively.
Perhaps I get really impatient and just double up the first bit and see how it sounds then. 😉
I have a strategy for the simple curved reflector in this design ready. But, you know how it goes. The pretty dual radial curve is attractive as well and becoming an intrusive thought.
There's little sound in our new house at the moment, might be nice to quickly finish this thing and drag it over. Music during home improvement. It would beat a Bluetooth speaker by a good margin, even if only because I made it and Voigt designed it. 😎
Oh, and we bought a house from 1975, from an elderly couple. They did all the decorating in the '70s and left it at that, so the place is like a time capsule. We will be updating the technical stuff and giving it our own colour scheme, but will retain a lot of the original typical '70s features of the home. My wife is looking at orange lamps and accessories, so I immediately drove to the hardware store and got some orange paint. I am not discussing this, but the interior of the horn WILL be orange and it WILL be prominently placed in our room LOL 🤣
I love it! I am from that era and totally remodeled a house and did all the decorating of it back then, even picked fabrics or couch, build end tables, redwood burl coffee table....but not orange stuff, I was a bit more modern style in taste, some of which I still enjoy.
Really enjoying your project here, excited to see the steps along the way and the end results🙂
Rick
Really enjoying your project here, excited to see the steps along the way and the end results🙂
Rick
Yeah, my parents were from that era as well and had a minimalist and modern style. I grew up with white walls and dark stained hardwood furniture and bare metal high quality design light fixtures. The orange was always a favourite complementary colour to every piece of furniture that my wife and I already own. We never really had it prominently in our interior though, we kept it low-key and understated. I think buying this house gives us the necessary excuse to be a bit bolder.
The original Voigt Domestic Corner Horn had some very nice art deco finishes, that would look good in more modern interiors as well. The Lowther P.W.2 version of this Home Constructor's horn is nice too. Some designs are simply timeless, more dated by colour choice or material choice. This gives flexibility to adapt to many styles. I'm looking forward to that stage, of a second build with additional attention to material and finishes.
The original Voigt Domestic Corner Horn had some very nice art deco finishes, that would look good in more modern interiors as well. The Lowther P.W.2 version of this Home Constructor's horn is nice too. Some designs are simply timeless, more dated by colour choice or material choice. This gives flexibility to adapt to many styles. I'm looking forward to that stage, of a second build with additional attention to material and finishes.