boom3

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I can see higher efficiency, although the T-35/K-77 is already about at the top of that parameter. That would drive another crossover change to mate with the mid horn. I could see a bucking magnet to cancel the magnetic field to prevent CRT distortion. But unless he is changing the diaphram and/or phase plug, he is not going to get smoother, higher highs.

look at hhscott.com for info about your tuner. I have the Scott 333C and I love it, although one of the AM IF transformers has died so only FM works. Phase inverters are usually used to drive push-pull output tubes.

Thanks!

Me so horny, me love Klipsch long time! Sorry, I could not resist... I guess the first time I heard Klipschorns was in 1972 at a pal's. He wanted to become a dealer but couldn't scratch up the capital. In succeeding years I heard the other models at various hi-end places, including Ideal Acoustics in Starkville, MS which I where is I met PWK in 1978.

I've done a forum search and a couple of Googles, and I can't track this down... Within the past two months, there was a thread about a CD that was specially recorded to yield a flat response when use with the RS SPL meter (analog or digital, I'm not sure). If anyone remembers the CD, plaese let me know. I thought it was Rives or Mapleshade but I can't find a mention on those sites. TIA!

It depends on how the original document was created. If it was created in Word, you can buy "PDF Converter For Microsoft Word" which will turn it back, more or less, into a Word doc. If the original item was scanned in to Acrobat, you can't re-convert it without "full" Acrobat, which can export the images as seperate bitmap files. If you can't buy the full Acrobat, I'd suggest buddying up to a librarian/archivist at a local college or large public library and ask that person if they have full Acrobat (most do) and if they'd be willing to work on the file for you.

The various production companies that made the Tarzan films over the years learned that past about age 8, chimps get very testy and dangerous. Mike Henry, in his time as Tarzan in the mid-60s, got a serious facial bite from the chimp who was playing "Cheetah".

Audio requires high-current devices with large leads. These devices may work in the computer nano-world but would not have the current capacity for audio.

If these are what I think they are, they are angular add-on tweeters that were often used with the AR-1 bass units in the late 50s. Check them out well, electrostatics usually don't age gracefully. If you do a google search on Janszen you find some info, most of it anecdotal.

It's a steerable phased array. It will be rather limited in bass (without a sub) and is probably only suited for smallish rooms. Weird it is, but not as weird as the Yamaha 'ear' speakers from the 70s.

I'm interested, but I wonder if it would be too efficient to be a center channel for my Cornwall IIs?

As long as we are talkin' dawgs...some breeds, due to over-popularity, have been ruined by inbreeding. Our first Cocker Spaniel (1953-1966) was a saint and the ideal family dog. She was protective of her family-like the typical spaniel-and defended my mother on more than one occasion when Mom was alone in a threatening situation. Cocker #2 (1966-1970)was a male that we got from a puppy mill where siblings were bred to each other. We didn't know this until much later. He was never "right". Nervous, subject to nightmares, and would turn on anyone, except my father. Dad was alpha and the rest of us were below the dog (in the dog's mind). After my toddler nephew started spending a lot of time with us, we realized we couldn't have an unpredictable dog around a little child. We had to have this beautiful, but crazy, animal put down. My sister now has a 5 yr old cocker that is very much like cocker #1. Apparently, as the popularity cooled and some discipline was brought to the breeding, the bad stock died out. Anecdotal evidence is that many breeds went through this. German Shephards (Rin Tin Tin), Collies (Lassie), St. Bernards (Beethoven), even Golden Retrievers and Irish Setters, two ur-family breeds, have had problems from over/in-breeding.

Some perspective: When PWK designed and fielded the Klipschorn in the late 40s, the last two octaves (20-40 Hz, 40-80 Hz) were rarely found on phonograph records. As LPs matured in the 50s, the second octave improved, but very few LPs, until the boutique pressings of the 70s, had anything below 40Hz. Now, with digital media and rock-em sock-em sound effects, some folks are worried that the basic design is set for 'only' 40 Hz. In reality, there is very little music down there and most of what we perceive in sound FX are the high-frequency leading edges of explosions, gunshots, etc. The significant compromises in the Klipschorn are not really in the bass horn, they are in the midrange (too small) and the tweeter (antiquainted design). In a bass horn, if you get a 10:1 ratio beteween the lowest usuable frequency and the highest, you are doing very, very good. PWK got 40-400 Hz out of the bass horn through years of refinement. If one wishes the bass horn to grow larger & longer to go to 30 Hz, that means the midrange horn now has to go down to at least 300Hz. That drives one to a larger midrange horn and beefier driver, which may also lead to a lower crossover to the tweeter. This is why we see so many folks using big Altec mids, JBL babycheek tweeters, etc on the basic Klipsch basshorn.

---------------- On 2/25/2005 8:22:11 PM WS65711 wrote: Boom3 - How long ago did you move? Many things have changed in recent years, like Benny Grunch & the Bunch sing, it "Ain't Dere no More". (snip) ---------------- Yeah, you right. I return to NO very frequently, just there for Carnival, of course. We march with St. Anne every year. I lived in the Vieux Carre in 85 and 86, however, I have been running the streets since 1982.

I've fancied about building an MTM Cornwall with two K-34s, two K600/601s and one K-79. Ah well, I will be content for the moment with four CW IIs.

The new definition of "dipthong" is a string-like bathing suit worn by someone who has NO business wearing it!

14 gage low-voltage outdoor lighting wire at Home Depot, Lowes, etc. Cheap, very flexible, and will disappoint the makers of 'audiophile' cable who will not be making a Beamer payment from those who buy it.

I think the answer is the home version of the Jubilee. However, there are no home version Jubilees, official or otherwise, in the wild to compare with Klipschorns, yet. All we can do is deduce what the Jubilee was 'meant to be' and try various approaches. From the threads recently I think a few folks are going to build them soon. I know I'd like to, but I will hang back a bit and let other brave souls take the point.

Hey, there are other Klipsch guys on the Gulf Coast. Woo-hoo! I have PM'd bsbutton that we have a LOT of geography in common, but germane right now is that I am a former New Orleanian and return frequently. I live in the Florida panhandle (AKA Lower Alabama). When in N.O. you can find me in the Marigny, or being a history/culture vulture at La Petite, NOMA, etc. I'm writing a history of the Quarter in the 20th century and I spend a lot of time at the City Archives at NOPL. Inside refs for my NOLA pals: "Where ya at?" "I bet I know where you got dem Cornwalls!"

The 'rules' governing dispersion of direct radiators do not apply to horns. The theoretical models of direct radiators assume perfect planes (or, if you will, an array of points) moving perfectly in phase. The actual measurements are, of course, quite different. The initial flare of the throat of a horn sets the dispersion at the highest frequency of interest, regardless of the final shape or size of the mouth. Paul once sent me an amplitude response curve of a Klipschorn at 0 and 30 degress off axis. The differences were rather small across the midrange and treble; the overall shape of the curve was essentialy the same as at 0 degrees. Of course, with a corner speaker, one cannot get more than 45 degrees off axis anyway.

If you read some of Don Keele's articles in the JAES about his horn designs, you will have this explained far better than I can. Keele worked out some of the deeper science behind what Paul had discovered empiraclly. My take on this question is that the ear's directionality in the vertical plane is poor and the lobing between the mid and tweet is less noticable if it is in the vertical plane. Paul's early mid horn, the K-5-J had flat, sides to control directivity. It was also cheaper to build that way. Since Paul believed the corner was the place of choice for any speakers, he also thought that 90 degrees dispersion-no more, no less-in the horizontal plane was the optimum. IMO, the claim by folks like EV that their vertically mounted diffraction horns have good horizontal dispersion is hogwash. It just doesn't work and no one else in the industry followed suit. Every sucessful PA design uses horns oriented horizontally. I do not hear a marked shift in timbre when I stand up after sitting in front of my Corns. If I did it would indicate that the lobing is marked in the vertical plane. I also hear a smooth transition between midrange and tweeter, so lobing in the horizontal plane must be very small. BTW, my Corns are about 2 feet out from the corners of a 16 foot wall, the room, is 25 feet deep. I moved them out from the corners to cut some of the tubbiness out of the bass.

Chris, you've got mail. I'm interested.

My favorite show and the only show I watch with any regularity. Which begs the question: Why doesn't the show ever feature any electronics? Do they not have any experts to appraise old gear? Among my favorite moments: Leigh Keno finding the husk of an insect in a pie safe and exclaiming that it had "great surface patina". The Kenos getting a little old lady nearly half-a-mill for her 18th century card table. Sisters dancing because their Tiffany lamp is valued at $125K. The guy from FL who had made his collection of costume jewelery into a hat. The tactful way the appraisers tell poor souls their items are repros or outright frauds.

What usually "wears a tube out" is mechanical shock from being moved around. The heater will go down gradually over period of years, but provided the design right to start with, a tube can last for decades, particulary with some kind 'gentle' turn-on feature to limit inrush current.