Mark Dyrbye

Thanks all. A fellow emailed me the Dope from Hope note, and my Heresy speakers were made just before the note went out in 1975. I compared my type D crossovers to the Type E, and yes, the polarity of the two horns is to be reversed, per Klipsch's recommendations. That is the only change I am aware of when the D became the E, unless the component (caps, etc) suppliers were changed. I made the polarity change in my speakers, and could not be certain of the difference. However, I have some lower quality parts in my system I have to upgrade (very soon!!!) so my listening patience is short. I'm sort of caught in a audiophile "hell" right now, not enjoying the music as I have listened to some great sounding equipment recently. I also changed taps on the T2A autotransformer (horn tweeter was at tap 3, moved to tap 2 to lower horn output by a few dB). This change I could hear right away - the brightness was decreased, yet the clarity was retained. The midrange is still too annoying on intense notes, so the other upgrades I need to do are still needed. I am planning to upgrade the crossovers with either Al K's design or just do a straight improvement of the existing 2 uF caps and the choke to much higher quality pieces. Since I live in Canada, and don't want to import (customs duties and other associated problems) I'm still reseaching suppliers. When I make the upgrades, I'll share my impressions. I sure value the information available through this BB! Thanks to all of you who keep it alive! Best regards, Mark

My 1975 Heresy crossovers are Type D. The tweeter is a K-77 and the crossover places a 2 mF cap (brown plastic) in series with connections to the T2A transformer. The mid horn K-55V also has a 2 mF cap (also brown plastic)in series with connections to the T2A transformer. The K-22-EF woofer is in series with an inductor labelled 2133. I have searched the archives and so far cannot find any references to this Type D crossover. I hope it is not rare. Anyhow, I would like to reduce the harshness of higher and more intense notes. Does anyone have any suggestions?

Say, all the responses are great! I have done a lot of reading of old threads since I started this one, so now I have much more insight into what fellow Heresy owners feel about their speakers and what tweaking is likely worthwhile. Regarding the 10 inch or 12 inch size of the woofer, I had measured the baffle cutout, which is about 10 3/8 inches, so I mistakenly declared it to be a 10 inch woofer. When I opened the enclosure and saw how small the volume is for the size of woofer, and how the two horns and crossover take up a fair bit of space, my first reaction was, hmm - lower notes cannot be formed in such as small sealed box, can they? So, I thought why not throw out the question to Klipsch as they must have made some tradeoffs to keep the size down. When I went to the Web page to find the email address, I noticed the forum, and rather than do the hard work of researching and reading, why not just throw out the question and see if someone has done some enclosure mods. Now that I have improved my music source with the Audio Note DAC, the Heresy's sound much better and so much tighter. I have to revamp most of my old stereo, and have a upgrade plan. But the Heresy's are certainly worth upgrading - the two issues I have with them are the lack of low bass, and the "horn glare" or whatever I am hearing on intense higher notes which bothers me. Anyhow, I absolutely appreciate the feedback I have received so far. Mark

Hi Soundog, thanks for your response. I will agree that the Heresy is a good speaker, as I doing some extensive shopping to replace them, when I decided to take my old CD player (1979 Carver) to an Audio shop to compare it to an Audio Note DAC 1.1 that I had been impressed with earlier. The short story - I bought the later version of Audio Note DAC kit 1.2 and wow, the Heresy's sound so much better! The bass is now tight, the transients on any notes are immediate, the definition of instruments vastly better, and so on. So now I am trying to improve the Heresy's in whatever practical ways possible. From the BB archives I have read about the P-trap (the squawkers are K-55-V), the crossover improvements, etc. But I sure would like to explore the lower bass question further. Anybody else checked the technical possiblities? Thanks so much for your help!

Brian, did you do anything to improve your Heresy's? I have 1975 vintage Heresy speakers and want to improve the lower bass.

I would like to improve a set of 1975 "unfinished" Heresy speakers with the 10 inch woofer to get lower bass. Has anyone done this or does Klipsch have some dimensions to try? I am prepared to build new enclosures with rounded edges, internal bracing, etc. The current inside dimensions are 11" deep, 14" wide, and 20 " tall. My first thought is to make them deeper, and possibly taller, to get the horns to ear level when sitting. Years ago I added a 12 inch base to them which helped very much. Also, I am wondering if aligning the drivers would make a difference, particularily the mid and high horns.