Georges

Hello To finish my project upgrading the Cornwalls I am looling for a piece of black cloth circa 1976 for the Conrwalls. Size I need maximun the size of a single Crnwall baffle. It is too complicated ordering it from France so if someone have some overdue willing to sell it most welcome thank you george

Good evening, I believe that we are loosing a little bit of sense in here. I donnot believe that there is any universal true quality test on acoustics since human behavior is THE main input. Of couse I am talking about coparing relatively equal products. I spend sometime sometime ago building the ALK-Cornwall crossovers. I sold them 15 days afterwards. That donnot means that they are bad. Some people like them some not. The same is with the Klipsch crossover, some they like them some not. The issue is your ear your amplifier and the music you hear. It reminds me this discussion also the eternal debate oil caps or hi-tech polypropylene. I got all species original oil from the Klipsch new from Jensen, Hovland and Auricaps. I tried them all. I donnot care their ECR if it s 200 2000 or 200000(I send once to AL on Hovland and one Jensen to measure them). I donnot liked the hovlands so I stick with the Jensens. Does that means that Hovlands are bad. No only there are not for my ears, same for some others. So trying to prove that Hi-Tech approaches can achive the best recults it is not always true. One thing is measure in the bench something. Another is to put it in an apparattus. It is not the same thing. I am of the Japanese approach; tuning the crossover and other components by ear not simulations. i did a lot of simulations in my life to believe them. cheers george

Hi here a simple way to do it. I test it and worfs fine. regards george http://engr.nmsu.edu/~etti/fall96/electronics/induct/induct.html

Hello, thank you for the informations; definately this 100uF on the woofer helps a lot and I use a crappy electrolytic sprague Atom...I assembled one of the 7uF type crossover. I will listen to the speaker for a few days to get the ideas clear. Still i am puzzled why Klipsch change so much the mid-freq section for the Klipschorn/Lascala. Apart the cutoff is it the efficiency of the horn versus the bass-reflex ??!! There should be a reason.. cheers george

Hello After reading and reading I decided to embarque in the ala mode project of mixing the bass bin of a Cornwall with the mid-high of the Klipschorn. The unfinished result is on the photo. For the rest of the descussion here the techicalities. Cornwall from 1977. Mid horn the Atlas with the push-button to put the cable in. T35 the round magnet one. Original Crossover type B. So I emptied the bass bin from everything except the Woofer. Install the top housing the mid K400 metal horn Plus tweeter. Crossover then the dilemma. I looked on the various comments/tests/etc on the forum. I opted to start from with the AA crossover. So the woofer got the coil from the original Cornwall crossover, the mid horn was cabled to 4-0 on the Autotransformer, via a 56uF cap. install also the non-p-trap combo (.2mH+4uF) on the Atlas, for the tweeter it goes to 5-0 on the autotransformer after the various 2uF caps and .2mH coil as on the original AA schema. plugged everything to my amp ( monoblocks from Fisher 100 with EL37 etc) AND: I cannot decide. Definately there is less bass than the Cornwall. Much more mid-high too much I could say. the total image is not so impressive. especially the lack of low frequency; the whle thing is less punchy also. So do you have any comments ??? To say also I tried in the beginning to leave the crossover as is but replace the 4uF with a 7uF...No much worse...Thank you george