Wrench Posted May 7, 2021 Share Posted May 7, 2021 (edited) Newbie questions: 1. Is it possible to increase the attenuation for the tweeter by changing, adjusting, anything on the crossover? I would like more output on the tweeter side. 2. Can the crossover be changed from 7k to 6k or 5k? Thank you. Edited May 8, 2021 by Wrench Quote Link to comment Share on other sites More sharing options...
Deang Posted May 8, 2021 Share Posted May 8, 2021 “Everything is permissible but not everything is beneficial.” Just replacing the capacitors will bring back some high frequency energy. Quote Link to comment Share on other sites More sharing options...
geoff. Posted May 8, 2021 Share Posted May 8, 2021 Titanium tweeter diaphragms will give you a nice and inexpensive boost, as well as higher highs. LMAHL lenses on the driver of your choice will produce even better results. Here is a really useful schematic comparison, but I am not knowledgeable enough to know what you could change. 1 Quote Link to comment Share on other sites More sharing options...
Wrench Posted May 9, 2021 Author Share Posted May 9, 2021 Thank you for the schematics!! Quote Link to comment Share on other sites More sharing options...
geoff. Posted May 10, 2021 Share Posted May 10, 2021 It seems all of the newer Klipsch speakers are handing off to the tweeter at lower frequencies. The La Scala II and Hersey IV are 4.5kHz, 5k on the Cornwall IV, and 5.2kHz on the Forte IV. Hadn’t consciously recognized that yet. The Cornwall IV and Heresy IV let the woofer run a bit higher too now at 700 and 850Hz vs the earlier 600 and 700Hz respectively. That is certainly one effective way to tame a horn. Quote Link to comment Share on other sites More sharing options...
Deang Posted May 10, 2021 Share Posted May 10, 2021 They also use different drivers and horns that allow for that. Quote Link to comment Share on other sites More sharing options...
KT88 Posted May 10, 2021 Share Posted May 10, 2021 Deang, I thought the current midrange driver was an alnico Atlas again, like the K55V used to be. Only that Atlas now specifies a maximum of 4500 Hz for some reason. The modern tweeters are indeed different from the classic K77 and they run easily lower than before. Quote Link to comment Share on other sites More sharing options...
Deang Posted May 10, 2021 Share Posted May 10, 2021 Sorry, missed the big Heritage reference. Yes, they still use the Atlas PD5-VH. The new Heresy, Forte and Cornwall use something different, maybe the Celestion CDX1-1742? Steeper slopes on the filters allow for lower crossover points. You get more protection for the tweeter, a bit more power handling, with lower distortion. 1 Quote Link to comment Share on other sites More sharing options...
Wrench Posted May 10, 2021 Author Share Posted May 10, 2021 (edited) Is the polarity for the tweeter on the Forte II and Chorus II being swapped from input values + and - according to the schematic? Edited May 10, 2021 by Wrench Quote Link to comment Share on other sites More sharing options...
Deang Posted May 10, 2021 Share Posted May 10, 2021 You can find all of those schematics in the “Klipsch Crossovers” thread, which is pinned at the top of this section. Quote Link to comment Share on other sites More sharing options...
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