erik peterson Posted June 4, 2002 Share Posted June 4, 2002 i built a set of k-horns from speaker labs plans and i am looking for a set of original k-horn crossovers or a suggestion of another good crossover to use, help Quote Link to comment Share on other sites More sharing options...
HDBRbuilder Posted June 4, 2002 Share Posted June 4, 2002 find some good condition AA networks...on the cheap...OR save up your aluminum beer cans so you can afford to have AL K make ya up some of his crossovers...like I have to do!!! ------------------ I can now receive private messages Quote Link to comment Share on other sites More sharing options...
j-malotky Posted June 4, 2002 Share Posted June 4, 2002 Erik What components are you using. Especially the Sqwaker and tweeter? Try to match the same vintage of components if you are going for a vintage sound. Talk to Big D - He is building a set of K horns right now. The ALK is a great option as HDBR points out. I talked to Al several months ago and he was selling them for $200 each for the A version used in Khorns. I may go to ALK's in the comming months. If so - I may have a pair of AK's from 1983, but that is not for sure. JM Quote Link to comment Share on other sites More sharing options...
Elso Kwak Posted June 7, 2002 Share Posted June 7, 2002 Hi Erik, The schematic of the KWAK-CROSSOVER for the Klipschorn is available by sending me a email. It is a fourth order Bessel Highpass filter for the squawker and the tweeter. The midrange level is adjusted by means of a L-pad; not a autotransformer. One Klipsch enthusiast has builded my filter and reported back that KWAK-CROSSOVER was much better than AA type and ALK replacement type at the high listening levels he enjoys. ------------------ ELSO Quote Link to comment Share on other sites More sharing options...
Al Klappenberger Posted June 8, 2002 Share Posted June 8, 2002 Erik, Many people, including me at first, have tried to replace the autotransformer used in Klipsch networks to reduce the squawker level with resistor "L" pads. Consider that the transformers Klipsch use in their networks cost above $30 each. If it was an improvement to replace them with two power resistors that cost 30 cents each Paul Klipsch would have done it in a heartbeat! The fact is that a transformer is far superior to an "L" pad. The main reason is the resistive loss divorces the driver from the amp. Energy generated by the voice coil when it overshoots (back EMF) will see the resistors, which is a rather high impedance. With a transformer, the back EMF is actually transformed up and sees a virtual short circuit looking back at the amplifier. PWK wrote an article describing the difference between the frequency response of a speaker attenuated with a L pad versus using a transformer. The transformer results in better frequency response. Listening test have shown that the transformer will actually sound better. Another misconception is the use of linear phase filters (Bessel) in crossover networks. The fact is that "inverting" a lowpass prototype filter to make a highpass filter preserves only the amplitude response of the filter. The linear phase (constant delay) component is totally lost. Since the amplitude response is very poor, a 3rd order Butterworth filter is nearly as good. In short, using Bessel filters is an expensive waste of parts! Al K Quote Link to comment Share on other sites More sharing options...
erik peterson Posted June 8, 2002 Author Share Posted June 8, 2002 thanks for all the help, now i think more confused about what to do , i wish someone had a pair of used crossovers to sell that would mush easier than building ones. erik Quote Link to comment Share on other sites More sharing options...
djk Posted June 8, 2002 Share Posted June 8, 2002 What are you doing for the drivers? I'd offer to sell you a pair of used Klipsch networks but they won't do you much good unless you have the K33E/K55V/K400/K77 parts set. Quote Link to comment Share on other sites More sharing options...
Rob's Klipsch Posted June 8, 2002 Share Posted June 8, 2002 Hi DJK, What kind of networks do you have to sell? I have 86 la scalas with k-77, k-55-m and k-33e in them with the AL network. I want a new net, but am tight on cash right now. I really want to get Al's network bu tI don't have 500 right now... Quote Link to comment Share on other sites More sharing options...
erik peterson Posted June 8, 2002 Author Share Posted June 8, 2002 i allready have my k-horns built for a few years with klipsch woofers out of a set of k-horns i bought off of e-bay the mid horn i got from mcm a university sound 1824m i don remember what the tweeter is but it sounds good now but i think it could be improved with good crossovers, when i built them i had just enough cash to do what i did and got a cheap set of ams enterprises crossovers ,now i want to upgrade erik Quote Link to comment Share on other sites More sharing options...
djk Posted June 9, 2002 Share Posted June 9, 2002 "Hi DJK, What kind of networks do you have to sell? I have 86 la scalas with k-77, k-55-m and k-33e in them with the AL network. I want a new net, but am tight on cash right now. I really want to get Al's network bu tI don't have 500 right now..." I wouldn't use my AA networks with the K55M. You might want to read this. http://216.37.9.58/ubb/Forum6/HTML/000925.html "but i think it could be improved with good crossovers" While you have the correct woofer the Klipsch networks will not work properly without the correct mid horn/driver combo and the correct tweeter. I have a pair of fiberglass K400 knock-offs with K55V (alnico) and K77 (alnico) and AA networks (oil caps). I would sell the set for $400 plus shipping. If your University 1824M are in good shape I would consider taking them in trade if you wanted. Quote Link to comment Share on other sites More sharing options...
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