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Bubo

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Everything posted by Bubo

  1. Another source for custom crossovers, I believe Volti may use this company for their crossovers. North Reading Engineering, North Reading, MA USA http://www.northreadingeng.com/
  2. If you don't mind spending a little coin, drive the damaged one to a reputable cabinet shop or two and get a quote, it's a slam dunk for them the cabinets are simple by their standards. IMHO MDF is OK baltic birch which they have plenty of is better, maybe also ask for a quote to make a new box and move the motor board over and get it veneered?
  3. They all have a personality
  4. https://www.youtube.com/watch?v=sQnBB3J7PHs Peter Malick Group feat Norah Jones.....
  5. While these parts may appear not to "wear" - in the AA type crossovers I have -- they were the lowest production quality to pass #s. Q is very important in design/balance. I have inductors purchaced from Mr Crites, and they are simply made to better standards. The bass is louder/clearer. Perhaps due to the overall resistance being closer to spec, larger wire... The Belle Klipsch AB Type crossover used no inductor for series bass connection. Other similar crossovers use 2.5, 3,or 4mH straight up or w/caps. They all sound differently. IMHO YOU get to pick have a good journey/upgrade. RU suggesting an inductor swap on the existing AA crossover, or the entire crossover for one of BCs? I'm probably going to order the stock replacement caps from BC, so once the iron is hot, a few more joints is easy.
  6. The beginning of the Electronic Harp Craze.....1985 In addition to being very dynamic, and original..... the crystal wind chimes are one of the better tweeter-system tests. Track 2 below, the sparkle is awesome on my system. Review from the company that does the reviews http://www.allmusic.com/album/white-winds-mw0000192331 Andreas Vollenweider - White Winds - Side A (Vinyl) https://www.youtube.com/watch?v=PXeJ4eQKQ8A
  7. Discussion on the K-55, which impresses me every time I hit play. https://community.klipsch.com/index.php?/topic/155463-k-55v-usable-frequency-range/?hl=atlas#entry1840350 https://community.klipsch.com/index.php?/topic/148659-new-k55x-vs-older-k55v/?hl=atlas Comparison, thank you Mr Crites for the traces https://community.klipsch.com/index.php?/topic/73483-squawker-driver-tests-k-55v-k-55m-k-51v-k-52h/
  8. This is another topic that comes up frequently, extending the bass with risers https://community.klipsch.com/index.php?/topic/157687-la-scala-mod-project-completed/?hl=%2Blascala+%2Bdriver#entry1888671
  9. I'll post these as I stumble across them. More LaScala mods, this one focuses on using an EV EVM 15B Woofer https://community.klipsch.com/index.php?/topic/159312-lascala-wev-evm-15b-woofer/
  10. Thanks for another successful get together...... And your nice family hosting us....
  11. AA network takes a 13uF cap not 16. I'm told you can substitute a 12uF without issue if you can't find the 13. Tweeters would be near the bottom of my list of things to worry about but I like the K-77. You might want to go with your alternative crossover update if you use Sonicaps or Daytons. Those caps are cheap enough it wouldn't cost much to experiment. Good catch, I just checked the drawing again. Corrected above
  12. Discussion on updating a used pair https://community.klipsch.com/index.php?/topic/156100-la-scala-tweaks-and-hacks-hit-me/?hl=lascala
  13. I copied my round up post over from this thread, please list any other LaScala mods, threads and parts sources. https://community.klipsch.com/index.php?/topic/149442-lascala-sonic-detail-improvement-for-only-22098/page-7#entry1926774 My LaScalas are circa 1980 Stock AA crossovers If I want to make improvements or changes in incremental steps, this is what I understand: Based on the above posts, and a conversation (2-3 years ago) with B Crites and the Klipsch factory support guy, the drivers in the LaScala don't wear out under normal circumstances. The capacitors, on the other hand do have an end of life, the transformer and inductor rarely fail (it would probably require an amp incinerating failure to fry the inductor or transformer). First: Update the 3 caps on the AA crossover, from the schematic in the pinned section. Stock: Sonicaps from Crites or others inc Parts Express brand. To me, stock always sounded very good 2x 2uF capacitors 1x 13uF Alternative Crossover update to lower the volume mids by 3db aka 50% decrease in power to Squawker. This is done to flatten the output across the bass and mids? I currently use an EQ to add output at the 400Hz point and rolling off into the up and down freqs from this point. 2x 2uF caps 1x 6.8 uF cap Both of these updates-mods are stand-alone and can be listened to and evaluated without further mods or repairs. Second This step could be either replace the K-77 (matched ?) phenolic tweeters with the Crites CT-125 EV driver with custom Crites Lens and titanium diaphragm. OR Replace the woofer with the Crites stamped Woofer $$, or Eminence Kappa 15C $, also mentioned above is the K-44 Factory $$$ woofer. http://www.parts-exp...-4-ohm--290-459 Both the tweeter and the woofer "upgrades" are standalone changes and require no mods to the crossover or anything else. Third If the K-77 is replaced with the Crites CT 125, as an option after moving to the CT-125.....the crossover point between the Squawker and the CT-125 can be lowered to take advantage of the increased range of the CT-125. Thread on CT-125 topic, one of many? https://community.kl...rs-in-la-scala/ Thread on Crossovers https://community.kl...pgrade-options/ Volti take on LaScala http://www.klipschup...upgrades2.shtml More horns + ALK http://www.alkeng.com/trachorn.html Alethia's take on custom crossovers http://www.aletheiaa...m/Services.html Crossover Options with CT-125: Do nothing leave at 400 and 6,000Hz, replace crossover 400 and 4,500 Hz, somehow modify existing crossover to 400 and 4,500. Forgot to mention the ALK Universal, I'm sure there are others.... The existing crossover may be modified, I don't know how. OR The AA crossover can be replaced with a new A 4500 from Crites http://www.critesspe...00-crossov.html "Problem with this is that the K-55 mid-range driver is pressed really hard to reach 6000hz. It would be much more linear in it's operation if the highest frequencies it has to reproduce were in the 4500hz area." Note: I'm guessing that PK the Designer was aware of this, and perhaps no better option was available than the EV K-77 tweeter, AND OR the mid-range K-55 is so sweet with the voice that it is better to leave as much of the voice as possible on the K-55 up to 400- 6KHz. Maybe if we had the engineer's notes we could know how the decision was made, I'm sure lots of trial and "does this sound better than"........ My opinion the LaScala: PK was a very good audio engineer, everything was done for a reason. Speakers that sound good, sell better. Was the mid range 400-6,000 intentionally boosted to put the human (Female) voice more forward aka Hear the Angels Singing? The K-55 really makes the angels sing. The low end could be better, a design trade off
  14. Claude, I'm just trying to get it all on one post, for myself and anyone that comes after me. As you can tell from my post, I am probably going to replace the caps on the AA crossover and keep it stock. If I'm happy, I may stop there since the consensus is that the stock drivers don't degrade over time. I have so may other projects that have to be done. There is also $$ Again, thanks for starting and maintaining this thread.
  15. If I want to make improvements or changes in incremental steps, this is what I understand: Based on the above posts, and a conversation (2-3 years ago) with B Crites and the Klipsch factory support guy, the drivers in the LaScala don't wear out under normal circumstances. The capacitors, on the other hand do have an end of life, the transformer and inductor rarely fail (it would probably require an amp incinerating failure to fry the inductor or transformer). First: Update the 3 caps on the AA crossover, from the schematic in the pinned section. Stock: Sonicaps from Crites or others inc Parts Express brand. To me, stock always sounded very good 2x 2uF capacitors 1x 13uF Alternative Crossover update to lower the volume mids by 3db aka 50% decrease in power to Squawker. This is done to flatten the output across the bass and mids? I currently use an EQ to add output at the 400Hz point and rolling off into the up and down freqs from this point. 2x 2uF caps 1x 6.8 uF cap Both of these updates-mods are stand-alone and can be listened to and evaluated without further mods or repairs. Second This step could be either replace the K-77 (matched ?) phenolic tweeters with the Crites CT-125 EV driver with custom Crites Lens and titanium diaphragm. OR Replace the woofer with the Crites stamped Woofer $$, or Eminence Kappa 15C $, also mentioned above is the K-44 Factory $$$ woofer. http://www.parts-express.com/eminence-kappa-15c-15-driver-4-ohm--290-459 Both the tweeter and the woofer "upgrades" are standalone changes and require no mods to the crossover or anything else. Third If the K-77 is replaced with the Crites CT 125, as an option after moving to the CT-125.....the crossover point between the Squawker and the CT-125 can be lowered to take advantage of the increased range of the CT-125. Thread on CT-125 topic, one of many? https://community.klipsch.com/index.php?/topic/153576-ct-125-tweeters-in-la-scala/ Thread on Crossovers https://community.klipsch.com/index.php?/topic/148350-la-scala-crossover-upgrade-options/ Volti take on LaScala http://www.klipschupgrades.com/lascalaupgrades2.shtml More horns + ALK http://www.alkeng.com/trachorn.html Alethia's take on custom crossovers http://www.aletheiaaudio.com/Services.html Crossover Options with CT-125: Do nothing leave at 400 and 6,000Hz, replace crossover 400 and 4,500 Hz, somehow modify existing crossover to 400 and 4,500. Forgot to mention the ALK Universal, I'm sure there are others.... The existing crossover may be modified, I don't know how. OR The AA crossover can be replaced with a new A 4500 from Crites http://www.critesspeakers.com/bk-sound-type-a4500-crossov.html "Problem with this is that the K-55 mid-range driver is pressed really hard to reach 6000hz. It would be much more linear in it's operation if the highest frequencies it has to reproduce were in the 4500hz area." Note: I'm guessing that PK the Designer was aware of this, and perhaps no better option was available than the EV K-77 tweeter, AND OR the mid-range K-55 is so sweet with the voice that it is better to leave as much of the voice as possible on the K-55 up to 400- 6KHz. Maybe if we had the engineer's notes we could know how the decision was made, I'm sure lots of trial and "does this sound better than"........ My opinion the LaScala: PK was a very good audio engineer, everything was done for a reason. Speakers that sound good, sell better. Was the mid range 400-6,000 intentionally boosted to put the human (Female) voice more forward aka Hear the Angels Singing? The K-55 really makes the angels sing. The low end could be better, a design trade off
  16. Not really, no, unless abused, because they are well protected from the environment. Sealed back, and a buried slot. Besides when a horn gets over 100 db, the cone moves only about 1 MM. Unlike a subwoofer cone, which gets 20X the excursion, this is not a problem for an original woofer. Thanks for the quick reply. I would have thought that they fatigue, but do have to admit every time I walk in the room my reaction is "that sounds good". A bit off topic, but the caps have to be at the end of the road. Crites sells Sonicaps (if I recall correctly) any favorites or suggestions. I just recapped one pair of my Heresy 1s and they sing, also recapped the Yamaha amp with them, so perhaps both are now happy. I'm thinking recap the crossovers, then go from there the CT 125s have fans, the mid horn drivers sound so sweet with female vocal they may be the last thing I would change. Recap, CT-125s?, then replace the woofers. On the current stock woofer the EQ setting that I like is definitely hotter on the 400 Hz than the rest of the bars.
  17. Just finished reading all of the posts, I have heard of this upgrade. The question that I have is this: Do the spiders, cones and surrounds on the original Klipsch LaScala 1980s wear out, has their performance degraded over 35 years?
  18. Simply Speakers version slightly different magnet... No gasket available..... https://www.youtube.com/watch?v=Slbru4arSCQ
  19. I am probably overly neat so for me yes, new gasket. From a practical point of view, perhaps the glue is enough to fill the voids. This kid has apparently been doing speakers since he could crawl, his father is his teacher. So yes, his repairs all look easy.....
  20. This HS Kid in W. Va has his own basement repair shop and cranks out the videos, lots of speaker repairs. This is a diaphragm replacement on the K-77, something I see a lot of people talking about. https://www.youtube.com/watch?v=s90esnzJ22s
  21. Pizza, I'm in, I would like to hear the Mac 240 Anything I can bring?
  22. Funny, I just put the flannel sheets back on........ 50s at night.....
  23. I keep thinking I need a good 20W Amp, and I keep buying powerhouse 200-300W Amps.....Headroom?
  24. As long as there is pizza, I'm in..... Let us know what to bring. Last time we auditioned the MC-30 which met expectations........ Any killer 2-20 watt class A amps out there?
  25. http://www.ebay.com/itm/Pair-of-electro-voice-sentry-iii-speakers-/111766890926?hash=item1a05d369ae Seller says looking for fast sale and local pick up. Was speaking with someone who owns a pair since new, he had them re-coned about 15 years ago.....
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