BEC

I am not completely sure who first used the term "Cornscala" but think I may have made that up. I know I used that term in this thread on Sept 24, 2004. I think I had just made it up when I posted that, but not sure. http://forums.klipsch.com/forums/t/45759.aspx?PageIndex=2 I know that from the beginning, I always thought of the Cornscala as a "concept" rather than as a specific speaker. That is, midrange performance out of a large horn like the Lascala rather than the tiny horn of the Cornwall and bass exactly like a Cornwall. Bob Crites

This one also.

Yes, the K-24 should be all right. Probably one of the K-22s was replaced later with the K-24.

The K-23 is the woofer used in the Forte 1 and is a 4 ohm. The K-22 used in the Heresy is an 8 ohm. Bob Cries

Dennis, There are certainly good caps and bad caps. Let's just use the good caps though. Using caps as tone controls (selecting caps with varing degrees of badness) is what I disagree with. Use a tone control if you want. Just let the crossover perform as a device to make the output of the speaker conform to the input. Do your adjustments somewhere else.

Some things are inaudible. I am glad I can't hear them. There is a word for those who can hear the inaudible.

Thanks for all the Happy Birthday wishes. Bob Crites

Ca. you post a pic of your crossovers? I've not seen one with no screws on it. My '89 LaScalas even have the terminal strip on them.Bruce Burce, The OP is correct. After about 1982, the Khorn is no longer easy to work on. In fact, I don't know how Klipsch could have made it more difficult to work on than they did. All connections are soldered to the crossover and all the drivers with no terminal strips anywhere. The bass section of the crossover is in the bass bin and all wire connections are with Monster Cable most of which by now is turning green. The Lascala with allmost the same crossover design as the Khorn, kept the standard of easy maintenance with the crossover all together on one board and a terminal strip.

Let's see... Here in the south it was "Dixie". Up north I think it was "Battle Hymn of the Republic".

That is a relatively new replacement diaphragm in your picture and not what would have been in a 1990 Lascala originally. The diaphragm you are showing is the replacement diaphragm for the K-77F used by Klipsch now. The OEM made by EV would have looked like the picture attached. Notice the copper-beryllium flat leads used on the OEM diaphragm. Bob Crites

Would have to be Dennis, I really don't know. All I know is that I am unable to get any more of the OEM diaphragms. The sad part of this is that I know where there are 1000 of them, actually OEM diaphragms lying in a warehouse. They will just no longer sell them. Bob Crites

Mike, those were not done at the same time and I was not making any attempt to calibrate for SPL to be right. They are just FR curves on axis. Bob

Actually that HF200 is pretty tough. I crossed one on the Eliptrac 1st order and went to 100 watts into the speaker and left it running for at least an hour. Never got any indication of any problem with the Fatal running like that. That is the test I was doing. Seeing if the Faital HF200/Eliptrac could be used on a Khorn at 400 hz and live through the test. I did not want to recommend it for use on the Khorn unless it could survive that.

This is the HF200 on the Eliptrac 400.

Not sure I understand this one. If the Faital goes low enough with the Eliptrac it goes low enough with the 402. I would not pass up a chance to get a good deal on a pair of 402s as they don't come up too often. The KPT-305-MB uses the 402 as low as 150. OK, I was in a hurry so did not post proof. But someone will always want proof so here you go. This is the HF200 on the K402. The red trace is raw (no crossover) green trace is with a passive crossover. Bob Crites

The Eliptrac 400/Faital HF200 will definately work on top of a Khorn. Problem with using the K-402/Faital HF200 is that I am not sure the combination goes low enough. My traces of the K-402/Faital HF200 do not look like you could use that combination low enough to meet up with the output of the Khorn bass bin at 400 hz. But, it might. Just depends on how it looks with a crossover.

yes, but niether of those numbers appear in the EV discontinued products listing. People have dsigned alternative crossovers for the K55 , k77 drivers so they must have this exact information yet it appears to be a mystery ... some say its 16, others suggest 13 ohm ( dc probably) and my own Spice simulation of the AK-3 xo suggests its is 8 ohms otherwise the mid response is underdamped. I can help you with impedance. I measured impedance vs frequency on a K-55M and a K-55V many years ago. I have attached that set of numbers. Bob Crites k55mimp.pdf

Just a bit sore and walking around like an old man. Humm.... That is about like normal, I suppose.

The actual acoustic crossover frequency is about 2khz. When I did the trace I have attached, I was not looking for the crossover frequency. I was measuring the effect on the FR of three different woofers, looking for one that would be good for a replacement. But, even though I was not looking for the crossover frequency, it is easily visible on this trace when you look at the part of the trace the woofer effects and the part that the woofer does not effect.

He's probably had that as a back up for quite some time, before there were as many alternate choices. As a matter of fact, where I live dial-up is still the only thing for lots of folks. Just happened that a few years ago, they managed to stretch DSL at only 1 Mbit to where I am. The next house down the road is too far away to get DSL and there are lots more of them on down the road with nothing but dialup. I guess there is the Direct TV internet service. I tried that many years ago and found it to be barely usable then. Could be better now. Back when I was using that, you had to have a dial-up connection to do the upload part. No cable available anywhere close to me. I can tether my iPhone now for a back-up, but that just barely works here because of the low cell phone signal. So, I will probably sign up for another dial-up service as a dependable back-up.

The reality of this thing is that we are not talking about lots of money. We are talking about $10.00 per month. But, for whatever number of months I paid that without them even being available to provide that service, I woud like that refunded.

A little update. Earthlink has decided to give me a credit for the current months charge for service they are not providing. Still working on some refund. Main problem is how to know when they stopped providing the service. They can not or will not check on when the service was discontinued. What they say is that perhaps the service was discontinued the same day I mentioned it, so unless I can pinpoint the time they stopped providing the service, they will not do anything. Now, here is the only fact I have on that. The local dial up number was 479-498-0952. If you dial that number, you get the recording saying that the number has been disconnected. The telephone company says they can not tell me when it was disconnected. They do know, of course, just will not give out that information. I sure need that one more piece of information and the two places that could provide it will not provide it. By the way, already tried the wayback machine. It did not record the particular page that gives local dial-up number for this area. Thought I had them for a moment when I was inside the wayback machine.

If a company stops providing a service, do they have to tell you, or is that your job to figure that out and complain? I had kept a dial-up internet service with Earthlink as a back-up for my normal DSL service. Over the years, I had to use it a few times to keep going during an outage of my regular internet service provider. So, last night, I decided to connect using the dial-up service to make sure it works on my new computer. I found that the dial-up number had been disconnected and Earthlink has no local dial-up number for this area. The monthly bill though has always been sent and I paid them. Called Earthlink and requested that the service be cancelled (since they no longer provide the service) and that my monthly payments be refunded back to the time that they discontinued service to this area. Spent a lot of time being transferred and finally got up to management level of supervisor, (at least that is what he told me). He told me that it was my responsibility to let them know when the service was discontinued not their responsibility to let me know. He has refused to tell me when service was discontinued, actually, he says that there would be no record of that. I think there is a record of when they had their local dial-up number disconnected. By the way, they also want the money for the rest of this month. They say that they cannot cancel it until the end of the month. So, even though Earthlink and I both know they are not providing a service to me right now, they still mean to get one more month of payment.

The K33 is made by Eminence, K69 by P-Audio... As far as all the newer lines... maybe. And K-55X made by Atlas Sound. K-77 now made by Dai-ichi.

Not really related to the discussion, but here is a nice chunk of good old 63/37 solder. I have had this bar for so long I have forgotten where I got it. There is probably still about 5 pounds left. I use it occasionally to top off my solder pot.