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Hi there. Has anyone ever come up with building plans for the Altec 1215A folded horn?
I was wondering what they may have sounded like with 416B (or A) or 515B. I haven't read any specs as to the sensitivity or anything else that would be useful, even with a 421. Can anybody fill me in?
Greets!
Yeah, IIRC they only have a ~41" pathlength.
GM
2 of them is much easier to move than a 210 http://www.hostboard.com/forums/
They don't work too badly in a 4 stack (2x2).
But if I were looking for home stereo I'd check newer cab designs.
I tried for a while with no luck.
The 1215A was superseded almost immediately by the 1215B, the only difference being widened for the newer frames. I owned a batch way back when, they worked well and were loud. The horn isn't much longer than a 210 horn, so they don't go much deeper.
Hi all... I'm looking for subs for my SR system and home theatre. At home I have 5 model 19's and 2 8184 (I don't like the 8184's). For sound re-inforcement, my main system consists of 8 SS-817-R's loaded with 421's and 421-LF's, 8 288/291 driver on MR94-8 horns and 16 MR94HF tweeters.
I'd post some pictures if I could. As yet, I don't know how. I can't even use a custom avatar because "custom" isn't on the list in the drop down menu. I follow instructions but, there is no "custom" listed. http://www.hostboard.com/forums/
Greets!
I believe I've already addressed your sub Qs, so I'm waiting on you to do something with the info.
'Custom' is available and in the instructions tells you to click on the word 'here' to take you to a browse link to get it off your computer. In the drop down menu, click on 'custom' to see it after uploading. If you see an A7 drawing as my avatar, then we know it works. http://www.hostboard.com/forums/
For posting pics you'll have to load them on a website such as Photobucket and add the appropriate link to your post. If you see a frequency response sim in this message, then it works too. http://www.hostboard.com/forums/
http://www.hostboard.com/forums/hbmc...2007/01/26.jpg
If either doesn't, then it's my inability to follow instructions and not the system's fault. http://www.hostboard.com/forums/
GM
Hmm, I see the avatar on my 'profile' page, but not attached to my post. http://www.hostboard.com/forums/
...........and now I do, I forgot to scroll down and click the 'update' button. http://www.hostboard.com/forums/
Hi GM
Custom' is available and in the instructions tells you to click on the word 'here' to take you to a browse link to get it off your computer.
I FOLLOWED THE WRITTEN INSTRUCTIONS. IT SAYS MY PICTURE HAS BEEN UPLOADED BUT MY PICTURE DOESN'T SHOW IN THE LITTLE BOX SHOWING THE AVATAR PICTURE SELECTED. WHEN YOU LOAD YOUR PICTURE DO YOU SEE IT IN THE LITTLE SQUARE BEFORE YOU GO TO THE DROP DOWN MENUE? MY PICTURE DOESN'T SHOW AND WHEN I GO TO THE DROP DOWN MENUE THERE IS NO "CUSTOM". I WONDER IF IT'S BECAUSE I USE LINUX INSTEAD OF A WINDOWS OPERATING SYSTEM? I WOULDN'T THINK SO BECAUSE I UPLOAD A .JPG FILE.
In the drop down menu, click on 'custom' to see it after uploading. If you see an A7 drawing as my avatar, then we know it works.
Hi GM
Custom' is available and in the instructions tells you to click on the word 'here' to take you to a browse link to get it off your computer.
I FOLLOWED THE WRITTEN INSTRUCTIONS. IT SAYS MY PICTURE HAS BEEN UPLOADED BUT MY PICTURE DOESN'T SHOW IN THE LITTLE BOX SHOWING THE AVATAR PICTURE SELECTED. WHEN YOU LOAD YOUR PICTURE DO YOU SEE IT IN THE LITTLE SQUARE BEFORE YOU GO TO THE DROP DOWN MENUE? MY PICTURE DOESN'T SHOW AND WHEN I GO TO THE DROP DOWN MENUE THERE IS NO "CUSTOM". I WONDER IF IT'S BECAUSE I USE LINUX INSTEAD OF A WINDOWS OPERATING SYSTEM? I WOULDN'T THINK SO BECAUSE I UPLOAD A .JPG FILE.
In the drop down menu, click on 'custom' to see it after uploading. If you see an A7 drawing as my avatar, then we know it works.
Hi GM
I changed my avatar. I thought it would only effect the new post but, it changes all the posts, current and past. I will change it back after posting this note.
My old avatar is back.... There simply is NO CUSTOM in my drop down menue. If you look at your profile, without changing the avatar picture, open the avatar drop down menue, does your's show the word "custom"? If it does, where is it located? When I open mine the first one listed is "none" followed by a line "-------" then "1015booptee", then "1015booptee2" etc.
As for subs for my home and SR systems, I think the first thing I'm going to do is dig out one or more of the custom ServoDrive units and give them a try. They are already bought and paid for and just packed away in my garage. Since my budget is tight, I think that's the smartest thing for me to do. If they don't work to my satisfaction, I'll try another "affordable" option.
Greets!
Why the 'shouting'? Your caps lock button broke?
I'm not very computer literate, so don't have a clue about how different operating systems handle the various forum software designs. FWIW, I have XP pro and use Mozilla Firefox. I tried a variety of file extensions and the only difference I noted was how the pic is scaled, though I don't know if that was the reason or a function of the forum software. Tall pics get squashed and vice versa. The current one is a jpg.
When I click on the drop down menu, its between 'none' and the line:
http://i120.photobucket.com/albums/o...tarpreview.jpg
Nothing I tried would make the word 'custom' disappear (other than moving the scroll bar down of course), so don't have a clue why it would be missing in your menu. Seems like you would either see them all or the drop down wouldn't function.
GM
Greets!
Bummer, makes no sense to me. Post a query here about your problem:
http://www.hostboard.com/cgi-bin/ult.../ubb/forum/f/1
GM
Hi GM
Sorry about the cap lock. My goal was to make my response to your text stand out. I didn't mean to shout.
The picture you show isn't what I get. Where you have "Custom" I have nothing but the line. I just tried it again, only this time I was intentional with my cursor and started with "none" then moved it down hoping there would be a blank space I could click on but, there wasn't. It went from "none" to "--------" to "1015 booptee", no "custom" like it shows in your picture or blank space I could try clicking on. How disappointing.
I'm playing with these.
http://www.billfitzmaurice.com/T36.html
I built a couple prototypes from scrap wood. They work.
Certain amount of PT Barnum at work, but as I say, was surprised with the results.
Most Altecs have too low a resonance for these. I intended to try 515 GHP's but just never got around to it.
Greets!
Yeah, with the advent of digital delay, long, coiled up bass-horns could now be used, so Tom Danley didn't waste any time unleashing his ServoDrive BT-7, and later, his freebie woofer design LABhorn that has been adapted by many for different drivers.
GM
Tom Danley is one sharp cookie. Never met him in person, have had a couple conversations on the net.
Greets!
Indeed he is! I had to miss his few summer BBQs c-u-m horn auditions up at his home in Illinois, but his factory is only ~45 mins north of me in the self proclaimed (and maybe actual) 'chicken capitol of the world', so if all goes well, I'll meet him there the next time he comes down. In the meantime, he's offered to let me see his latest secret project, so looking forward to this: http://www.diyaudio.com/forums/showt...65#post1115465
GM
OG, i'm also looking over the tuba 36's with great interest, but am stuck in a bit of a rut with the drivers i want to employ.
I have four NOS Emilar EW15's that i'd like to use for subwoofers. I'm unable to find any T/S parameters on these woofers. With my limited knowledge I've been able to only determine the very basics including an Fs of 21hz.
I suspect this is lower than ideal for an enclosure like the T36. I'm only interested in using these below 100hz as subwoofers for use with A7's, and possibly 817 or 815's in the future.
Opinions and suggestions for a foolproof box design for these are invited and welcome as well as appreciated.
Wow, 21 hz. Yeah that's not gonna work well in the T36.
Best Altec candidates would be probably 421 or LF, or maybe the 515 GHP. I haven't modeled any of them yet. I have a pair of Eminence I got as samples that are basically the 3015 LF with a couple of tweaks. They work well in that box.
With the emilars you probably want to go ported or maybe even a large IB.
You might want to check some of the high efficiency boards, you may find a geek close to you who could measure them for you.
Isn't there a guide in one of the Altec enclosre books on the "old style" tuning method? Maybe that would work for Bowtie...
Yes, large ported box seems to be the consensus for these. I played with a pair in some ~9cft boxes with 6in dia 8 inch long ports and they seemed to perform quite admirably down in the 30 hz region, i'd like to get lower and am confident these are capable.
These seem to by all appearances demonstrate a lot of influence from the altec designs, no doubt from Renkus' tenure at Altec working directly under Mr. Hilliard. They even sport a 16 inch frame quite similar to the Altecs.
Any experience or info out there on these?
http://i107.photobucket.com/albums/m...7ss/ew15-2.jpg
http://i107.photobucket.com/albums/m...7ss/ew15-1.jpg
Greets!
Nope, have you queried the HE asylum members? They know a lot about their horns, so maybe: http://64.154.92.195/scripts/etv.pl?forum=hug
GM
I haven't actually tried this.
http://sound.westhost.com/tsp.htm
Have you tried the folks at Plus One Engineering?
They have some old Emilar docs. I know at one point they were considering marketing recone kits for these.
I found this drawing ,looks similar to Altec 1215A.
http://www.hostboard.com/forums/hbmc.../2007/01/7.jpg
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Hi Convergence- that's a lot bigger. I think that is the Shearer horn with space added to square off the ends. I have that print, been meaning to compare it to the Shearer print but just haven't had a chance.
<font size="2" face="Verdana, Helvetica, sans-serif">The Shearer, was my first thought too.Quote:
Originally posted by Old Guy:
Hi Convergence- that's a lot bigger. I think that is the Shearer horn...
<font size="2" face="Verdana, Helvetica, sans-serif">The Shearer pictures that I have from the Lansing Heritage site look to have squared ends, although they are open on the back side, so you can see the angular pieces of the horn flare.Quote:
...with space added to square off the ends.
<font size="2" face="Verdana, Helvetica, sans-serif">Is the Shearer print online someplace?Quote:
I have that print, been meaning to compare it to the Shearer print but just haven't had a chance.
All the Shearers I have seen have had angled ends- at least several dozen, maybe over a hundred. They were widelu used in SR in the late 70's.
The only Shearer print I know of is in the Audio Cyclopedia- mine is packed away. I should scan it and put it online somewhere- I don't know of any place where it is.
Btw the print shows angled ends too. It's credited to Olson.