drobo1 Posted June 20, 2001 Share Posted June 20, 2001 Al Klappenberger, I copied the post below from a thread on the AudioAsylum high efficiency speaker board. I was curious if you had tried this since this guy seems to be so sure that the autoformer is the wrong way to attenuate the squawker to balance the drivers in the Heritage line. Thanks ahead of time, drobo -------- Hi Sam P, Paul Kipsch uses a autotransformer to attenuate the midrange by about 6 dB. However that is a very oldfashioned way to do it. A bonus as regarded by Klipsch is that the impedance seen by the amplifier is high and not a difficult load for that amplifier. The Klipschorn sounds MUCH more open and transparent with the transformer removed and a 3 pole Butterworth or 4 pole Bessel high pass network with polypropylene caps. And a resistor network for the attenuation. Try it if you don't believe me! ELSO This message has been edited by drobo1 on 06-20-2001 at 03:21 PM Quote Link to comment Share on other sites More sharing options...
Elso Kwak Posted June 20, 2001 Share Posted June 20, 2001 Hi Drobo1, Thanks for bringing my AApost here! So you did not believe me? Al Klappenbergers version 3(?) was also without autoformer. ------------------ ELSO Quote Link to comment Share on other sites More sharing options...
Al Klappenberger Posted June 20, 2001 Share Posted June 20, 2001 Drob1, Yes, I tried to remove the transformer. It went back in pretty fast! The transformer IS the better way. It provides damping to the driver back from the amp. A resistor pad isolates the driver and allows it to do it's own thing. The result is a better response WITH the transformer. Al K. Quote Link to comment Share on other sites More sharing options...
drobo1 Posted June 20, 2001 Author Share Posted June 20, 2001 Elso, I didn't say I did not believe you. I don't have the resources to test your statement. I have the ALK's that Al believes need the autoformer. They are much improved over my 22 year old stock X-overs. I am looking for responses to your opinion. drobo Quote Link to comment Share on other sites More sharing options...
Elso Kwak Posted June 21, 2001 Share Posted June 21, 2001 Hi Drobo1, Recently I made a comparison between the original Klipsch AAnetwork <13 µF cap and autoformer> the latest Klipsch network with the inductor across the midrange and of course Al Klappenbergs latest network; with the original Klipsch autoformer. Of these three networks I liked the latest Klipsch one the most, and Al's the least. But all the networks with the autoformer bring a certain mudding to the sound. Yes my network is also more revealing and less forgiving for bad frontend especially digital equipment. I mean your amplifer CDP and DAC have to be absolutely first class! You don't need large resources to build these filters. Let your ears decide if you like it without autoformer. I played years with the third order Butterworth filter (highpass) but not so long ago switched over to Bessel fourth order for the mid and the tweeter. This is my end station so far. ------------------ ELSO Quote Link to comment Share on other sites More sharing options...
johns02 Posted June 22, 2001 Share Posted June 22, 2001 Elso, How about posting your diagram, I am always looking for a project. Quote Link to comment Share on other sites More sharing options...
MacKlipsch Posted June 23, 2001 Share Posted June 23, 2001 I have a set of "sonically superior" stock Klipsch AA networks for sale.....Let's see...ALK's were $500....how about $600 for the set?..... Quote Link to comment Share on other sites More sharing options...
Elso Kwak Posted June 25, 2001 Share Posted June 25, 2001 Hi Johns02, That would be nice but how do I post a schematic here on this forum or on Audio Asylum? Maybe you can help. ------------------ ELSO Quote Link to comment Share on other sites More sharing options...
Elso Kwak Posted June 26, 2001 Share Posted June 26, 2001 Message for Wolfram in Germany: Hi Wolfram, My e-mail does not reach you ; I got it back undelivered! Please email your phone number to make a appointment to audition my filters as you desired. ------------------ ELSO Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.