[JN] Darling Speakers

Jeffrey W. Jackson experiencemusic at hotmail.com
Thu Apr 25 10:27:04 CDT 2019


that is a blast from the past!  I built those way back when... Radio Shack RS-1197....

I actually preferred the larger RS-1354... but both were volume limited.. I ended up using a forward 1354 and a rear facing 1354.. and low pass crossed the rear and used it for baffle step compensation... at least I think I crossed it over... man... been a while...

all that was right before I abandoned direct radiators.. figured I would spend a "few months" investigating horns... bwahahahhaa!!!!


peace,
me


Jeffrey W. Jackson
Chronically Terrible Judge of Time





To: John Day

Oh, that does look like fun! Any ideas about what I might use for drivers? A list member kindly offered me two of the Radio Shack drivers, which I plan to take him up on, though the massive Canadian post bill for them is anathema. I wouldn't mind paying him, but giving the money to the post? Well...

Just another John

On Thu, Apr 25, 2019 at 5:42 AM John Day via Sound <sound at soundlist.org<mailto:sound at soundlist.org>> wrote:
I have used Martin King's design process multiple times for tapered quarter wave transmission line speakers. Though he has done extensive math, and his Math-CAD is now proprietary, it is not really necessary to use it, if you read and understand his articles and analysis from the early part of this century. I don't find my favorite design of his, that uses a couple of little Fostex (from Radio Shack on closeout around 2002...) FR drivers in a folded tapered line, with one angled of the top/back corner and the other front-firing. These are in front of me, but the images are gone from the ethersphere these days.
https://www.tiffe.de/roehren/ML_TQWT.pdf<https://nam04.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.tiffe.de%2Froehren%2FML_TQWT.pdf&data=02%7C01%7C%7Ccb6b2326cf7d4954f08c08d6c98e5fb5%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636918010666173229&sdata=69lwaqtcWg463nBVHEkskpUS%2BKams8I1zr4ZhuF5Nx4%3D&reserved=0>
http://www.quarter-wave.com/Gallery/Gallery.html<https://nam04.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.quarter-wave.com%2FGallery%2FGallery.html&data=02%7C01%7C%7Ccb6b2326cf7d4954f08c08d6c98e5fb5%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636918010666183234&sdata=iulFEMzLbNouO2fzm0eurmJ6sHpNKWEXRxe2pzErf7s%3D&reserved=0>
http://www.quarter-wave.com/<https://nam04.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.quarter-wave.com%2F&data=02%7C01%7C%7Ccb6b2326cf7d4954f08c08d6c98e5fb5%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636918010666193245&sdata=VvXJOWs982oolrEk1umWzQy5ny3Rh4yORXukKtpV2EU%3D&reserved=0>

Ah, Found It!
 http://diyaudioprojects.com/Speakers/BD-Pipes/BD-Pipes.htm<https://nam04.safelinks.protection.outlook.com/?url=http%3A%2F%2Fdiyaudioprojects.com%2FSpeakers%2FBD-Pipes%2FBD-Pipes.htm&data=02%7C01%7C%7Ccb6b2326cf7d4954f08c08d6c98e5fb5%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636918010666203250&sdata=rYm1bLF%2FciBzDtB8FWZrWpegBAlAkP1Er12sV0J0Ydw%3D&reserved=0>
[image.png]


On Wed, Apr 24, 2019 at 2:52 PM ben via Sound <sound at soundlist.org<mailto:sound at soundlist.org>> wrote:
On 4/24/2019 9:01 AM, BBands via Sound wrote:
> Jeremy put me on to this idea with the tl design he uses at home. I
> forget the details, a small Fostex driver of some sort. He is driving it
> with just a couple of watts and said it was quite efficient. I built a
> larger tl design with an 8'' driver that I like a lot, so it seems
> logical to try a smaller one for the darling. In any case I like the
> wood work...
>
>        John
>
> On Wed, Apr 24, 2019 at 7:05 AM Hans Hedal <hans.hedal at post.cybercity.dk<mailto:hans.hedal at post.cybercity.dk>
> <mailto:hans.hedal at post.cybercity.dk<mailto:hans.hedal at post.cybercity.dk>>> wrote:
>
>     Just curious - you want to make a transmission line enclosure - perhaps
>     small in size.
>     Is this enclosure type chosen, because it is known to have higher
>     efficiency than other loudspeaker cabinet types?
>     (the efficiency could of course also depend of cabinet size)
>
>     Hans
>
>
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