WMcD

It is instructive to look at US Patent 4,210,which concers the big MCM bass horn woofer. The Length to double area is 23.3 inches which gives an Fc of 31.95 Hz. You can find the document at USPTO.GOV or Google Patents. There is in that patent document some design information. And Klipsch and Gillim use the 18.1 figure (so I was correct!) Many thanks toJames and also to John A for helping me through this stroke time. WMcD

Typically horn flare rates (areas)are described by the term "cut-off" frequency aka "Fc"; at freques below this this the horn just about stops working. You put Fc into the exponential equation however, PWK often used the term "lamedh" (I'll use "Ld") to describe the horn area expansion; It is the lengh of travel down the horn in which the area doubles (or halves). Therefor the expansion works like animals / bacterium doubling every time period. If my math is correct, the cuttoff wavelength (I'll call it "Lc) is 18.1 times the length to double. We can examine the LaScala's two paths (combined) and notice the area at the throat is 0.5 ft^2; then the paths go across the back to the interior corners where the area is 1 ft^2; then toward the front for a foot to where the area is 2 ft^2; then another foot to the mouth where the combined area is 4 ft^2. Therefore we see the Ld is 1 foot or 12 inches. The Lc is thus 18.1 * 12 and we dived the velocity of sound 15,00 in/sec by that wavelength to get an Fc of 62 Hz. We can check the PWK article on the K400 horn and notice that the length to double is given as 2.75 inches. The math like the above shows that it's Fc is 270 Hz. PWK was really getting it to go as low as possible to where the bass bin on the Khorn is running out of steam! Good night all, WMcD

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i l live. wmccd

The ussual response to a question like this is to try different things and see what you like. But I think that is a cop-out (unless you'asking an aesthetic question -- like what color to paint the spare room. Rather,you are asking a technical question in view of conflicting instructions. IMHO your likely best starting point is to use the output tap with the lowest ohms rating. *Very generally this will have the least hum and noise. (if those are a problem) *Very Generally using a light load (16 ohm load on an 8 ohm tap) will result in lower distortion. WMcD

It looks like Im wrong about hair spray. https://en.wikipedia.org/wiki/Hair_spray

The attached cut-sheet provides some info. It appears to me that the LS (at least that year) was available in unfinished, clear lacquer, or black lacquer. I can only think that Raw is unfinished rather than clear lacquer. It is my understanding, and small experience that lacquer is used on furature because it can be sprayed and cures very quickly. I think hair spray is lacquer. Otherwise it is poor finish because it can be damaged by water. White Rain can be washed out. Clear lacquer causes very little change in the grain of birch. I would try veneer first. WMcD LaScala and Belle Cut Sheet (blue grid) (1).pdf

In a similar situation I used foam weather stripping. Getting the right angle bend worried me even though I thought that under compression the bevelled edges (like a picture frame) will mush together. I did not investige further. Then I tried using the foam sheet which HD sells as a liner for tool drawers. It was too gummy and would not allow the hatch to open . You know the cable saws HD sells to cut PVC? I had to get the cable in the gap but it was a messy job. Next time I may cut the gasket from a yoga mat . WMcD 1. fo

I think Klipsch will sell you a new woofer, though not a Jensen, but might ask for the serial number of the speaker. If it is not available I don't know. I would get two. WMcD

Lye as in Murphys is the major ingredient in Easy Off oven cleaner. I have not checked for its use on wood. smile.

https://www.popularwoodworking.com/woodworking-blogs/murphys-oil-soap-a-most-unusual-story/ This gives you a solution of lye and water.

It is possibly okay as long as neither the water nor the soap reach the wood. WMcD

One of our members found that it ruined speakers. DO NOT USE!!!!

After the second Pfizer I had a little ache while reaching for a bottle of ketchup. That is all. "Doctors and scintists can't tell you the long term effect. " Ridicule is not sufficient to address this. The scientists didn't use the flux capacitor Delorian to go ten years to the future and check the results? Gasp. They didn't even use the Sherman-Peabuddy Way-back to go to the past, jab a few people and then see the effect in the present. Double gasp. People who harp on this lack of information as if they have seen through a magnificent deception do not have the sense that God gave a goose. They are dangerously sophmoric (wise fool). Being vaxed is not a matter of whimsical or political personal choice -- that crabby refusal kills our fellow citizens. (Daddy, why did grandma have to die? Was it because you refused to get a jab?) They should be forced to go to a nursing home or hospital or even India where people are attempting to breath their last breath, and can't. In India the funeral pyres are located in the hospital parking lots. The anti-vaxers should go and help chop wood. WMcD

In my view that is how it works, to the extent it works. I've never seen a Klipsch design with this technique BTW. WMcD

I don't know. Maybe it allows the lamp to light after you've blown out your tweeter. !!! I suppose there is some sense to this because some people might assume the tweeter is still good and continue to crank the power. Though I'll admit it seems like the resister will not allow much current. BTW, incandescent bulbs have a low resistance when not getting hot enough (current) to illuminate. Then when there is sufficient current, i.e. temperature, to glow the resistance increases and thus supply some protection to the tweeter by current reduction.

The T-35 (K-77) tweeter is rated at 5 watts long term and IMHO that can be assumed for other tweeters as a ballpark figure. Therefore long term current is about 0.8 amps. Obviously the tweeter is the most delicate part of the system. WMcD

I'm Gobsmacked.

I had only hear about it.

I can't quite make out the picture on the wall of the drawing. It could be people worshiping the golden cow.

Ha. The story begins in modern times when it was found that infecting people with cowpox prevented smallpox (which of course was deadly). Brilliant medical work. Smallpox it mostly eradicated now of course and millions, and millions of lives have been saved. The term "vaccine" derives for the word for cow, naturally. Journalists, then, of course lost no time in creating propaganda that patients would start looking like cows. Had NPR been around it would have been stirring this pot. These sorts of people should get a new angle.

I agree with Larry. WMcD

I was looking for info on the H-Bomb and the atoll.. Where does that show up? I thouht I'd get flack about Svengoolie.

Please excuse my ignorance. Attached is a screen shot of something which apparently Google has installed on my computer and adds to when it figures the site is something I visit regularly. What is it called? One thing to chage, first; You'll not that G-Mail is one of icons although it has recently changed to being labeled with a family nickname (which I've been tryin to stomp out) which is used by my neice. (She is lonely and so emails me once or twice a day to Dear Uncle ___.) And clicking on the icon i transports me to a recent email from her rather than the general Gmail in box or home page. Something which I want to change. Don't ge me wrong. The overall scheme works for me and a collegue has asked me to put something similar on her computer. However it is difficult to learn about it (research) because I don't know the name of this dang utility. Can someone help, please. TiA, WMcD