besides the amusing quarrel i find this thread quite informative.
the "rodspeaker" ad is simply hilarious, and the speaker itself looks interesting. good proportions in my opinion.
im happy having learned about it.
cheers,
mikey
I'm selling a pair of JBL 4435 in Vienna, Austria
Have to wonder where this system is today, if it still exsist at all.
Russ
Thanks for doing that / they've been extremely useful .Originally Posted by SkyWave
What magazine did you find them in ? ( R.E.P. , db Magazine, Modern Recording, ???? )
- Yes, that's sure what the new scans appear to show, to these eyes .Originally Posted by grumpy
- OTOH, "Apparent Beaming " may not be as great, as one would assume .Originally Posted by Mr. Widget
- That sudden ( 70 - 90 degree ) termination of the throat will encourage some HF diffraction / giving a wider pattern than what's "seen" . Fostex tweeters use this phenomena to some effect .
- ie; it could be worth simulating this UHF setup and then measuring the polar patterns .
- I still agree that the low speaker placement in the picture is pretty poor .
- Yea ( too bad about all that noise ) .Originally Posted by demon
- Sometimes I choose to get involved in a thread because I feel the "concept" has some merit and hasn't yet been explored here ( to date ) or in any of the other usual forums .
<> cheers
ps ; I'm not finished here ( unless the op gets back on his soapbox ). I'm just catching up on some wiring projects that are for this weeks' work .
Pretty sure I'd first seen that ad in Playboy.
je
Think I saw it in Rolling Stone.
Hi,
Can't respond to your PM, tried.
To answer your question,
I used an Epson Workforce 310 scanner/printer. Too small to do the entire ad in one scan.
I don't understand why you replied "no" and quoted me saying "I made some scans" in your post number 30.
http://audioheritage.org/vbulletin/s...7&postcount=30
Maybe something was deleted by you or the moderator? Just seems odd. Anyway, I don't come to this forum too much, perhaps I missed something.
Good luck with your speaker building.
Earl, I bought a repro of the ad from a guy on EBay. It's a great ad. I have it next to my 9844s in my office. I'd wondered for a long time what that tweeter in the RodAd could be.
". . . as you have no doubt noticed, no one told the 4345 that it can't work correctly so it does anyway."—Greg Timbers
Are the tweeters in Post 36 above "one-offs" except Fostex or are they conversions of other production 1" compression drivers with custom fabricated horns?
They remind me of 075 bullet nose tweeter designs that have been "ripped-off" and modified using some metal stock and a lathe for the unique horns.
I'm reasonably sure JBL had patents on 075 tweets but they were introduced very early and patents run out in 15 years.
Anyway, these are interesting. I don't believe I have seen any of these before now.
Those 3 are all current Fostex tweeters available from Madisound.Are the tweeters in Post 36 above "one-offs" except Fostex or are they conversions of other production 1" compression drivers with custom fabricated horns?
They've been making similar "bullet style" tweeters like that, since the 1980s .
Here's are some pics of the more affordable models ;
Morning, Mr. Widget, and All,
I got to thinking about this, and remembered that I have a pair of Altec MR902-16HF drivers, that came to me without the little Mantaray horn. I used them, for many years, in a PA situation, and later in my home stereo, and always with much satisfaction. I always thought that, without the MR horn (which Altec rated as offering 60°x40° dispersion), they were nothing more than regular 902 drivers, and used them as such, crossing over to them at 1,200 HZ (Community Horns/ 60x40). They always came across to me as sounding very smooth and (dare I say it?!) "sweet"!
Since Altec rated this driver, with it's "Tangerine phase plug, up to 20KHZ, it's very possible that they did use it behind the plate in those "Rod Speakers", as a HF tweeter driver. I know that, somewhere down in the Hobbit Hole, I have a magazine with that original ad that began this thread, don't have time to dig for it, right now. Interesting, nonetheless..... Take care, and God Bless!
Every Good Wish,
Doc
The only thing that can never be taken away from you, is your honor. Cherish it, in yourself, and in others.
There are currently 1 users browsing this thread. (0 members and 1 guests)