3dzapper Posted March 14, 2004 Share Posted March 14, 2004 Has anybody seen or tried these? http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=50597&item=3083984435 Rick Quote Link to comment Share on other sites More sharing options...
3dzapper Posted March 14, 2004 Author Share Posted March 14, 2004 Rick Quote Link to comment Share on other sites More sharing options...
Q-Man Posted March 14, 2004 Share Posted March 14, 2004 I think I saw those on ebay. Wern't they home built? Being home built would make me wonder if they were really 300Hz horns or not. They do look nice and the size looks like they could be 300Hz horns. Do you know the depth measurement? Quote Link to comment Share on other sites More sharing options...
3dzapper Posted March 14, 2004 Author Share Posted March 14, 2004 Q-Man, No, I know nothing about them. I saw them on ebay too and wondered about them. They do look nice though don't they? My wife wouldn't go along with the Altec horns so I'm still looking. Rick Quote Link to comment Share on other sites More sharing options...
djk Posted March 15, 2004 Share Posted March 15, 2004 The bass horn is not a Klipschorn, it is much larger. By the time you get a 2" driver on this horn it will be hanging over the front of a stock Klipschorn by about 8" or so. Quote Link to comment Share on other sites More sharing options...
ZAKO Posted March 15, 2004 Share Posted March 15, 2004 Is,nt the cutoff of the K401 lower than 300hz? Quote Link to comment Share on other sites More sharing options...
IB Slammin Posted March 16, 2004 Share Posted March 16, 2004 ---------------- On 3/14/2004 8:06:15 PM 3dzapper wrote: Q-Man, No, I know nothing about them. I saw them on ebay too and wondered about them. They do look nice though don't they? My wife wouldn't go along with the Altec horns so I'm still looking. Rick ---------------- Rick, Try telling your wife to stop bit*hing, close her eyes .....and listen Works for me....... Terry Quote Link to comment Share on other sites More sharing options...
IB Slammin Posted March 16, 2004 Share Posted March 16, 2004 ---------------- On 3/16/2004 6:19:53 PM IB Slammin wrote: ---------------- On 3/14/2004 8:06:15 PM 3dzapper wrote: Q-Man, No, I know nothing about them. I saw them on ebay too and wondered about them. They do look nice though don't they? My wife wouldn't go along with the Altec horns so I'm still looking. Rick---------------- Rick, Try telling your wife to stop bit*hing, close her eyes .....and listen Works for me....... Terry ---------------- Sorry....couldnt get the attachment to send..... Quote Link to comment Share on other sites More sharing options...
boomer9911 Posted April 12, 2004 Share Posted April 12, 2004 sweet.... Quote Link to comment Share on other sites More sharing options...
WMcD Posted April 13, 2004 Share Posted April 13, 2004 This is from memory. I once calculated that the Fc of the K-400 is 370 Hz or so. PWK's article said they double in area every 2.75 inches. The K-5 doubled in 2.25. You can calculate from there. Gil Quote Link to comment Share on other sites More sharing options...
WMcD Posted April 13, 2004 Share Posted April 13, 2004 Revisiting the calcs. PWK said the Fc wavelength is 18.1 times the L (should be the Hebrew lahmed symbol) to double area. I confimed that some years ago using the classical exponental equation for horn expansion and Fc. Sorry, can't do that right now, but maybe over the weekend if anyone is interested. From memory of the article the L of the K-5 is 2.25 inches The speed of sound is 13500 inches per second. This is part of the conversion from wavelength to frequency. Fc = 13500 / (2.25*18.1) = 331 Hertz The L of the K-400 is 2.75 inches. Fc = 13500 / (2.75*18.1) = 271 Hertz I don't quite know why PWK was using L in his publications. There was good reason in that it allows some rough mental math. On the other hand it keeps the Fc out of the hands of uneductated pundits. Please note that in horns of infinite lenght, good loading takes place down to about 140% of Fc. Looking at some other data from Harry Olsen, a somewhat long, finite horn with a properly sized mouth does better. This is based on the very complicated impedance transfer equation discussed by PWK in one of his papers. There PWK goes into the transfer ratio but does not tell us about the mouth load he used. Now you know what I know. Gil Quote Link to comment Share on other sites More sharing options...
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