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Everything posted by JohnA

  1. Horns have a low frequency cut-off based on their dimensions (length, mouth area, etc.). Some Heresies used a K-55-V squawker driver with their K-600 horn. The K-55-V is capable of going down to 110 Hz, but the K-600 is not. It is intended for use above 600 Hz. It's true cut-off is probably 450 to 500 Hz; somebody will know. Below the true cut-off frequency the driver diaphragm will unload, there will be little output and it can be damaged by excessive excursion. You must be intending to use the squawker and tweeter near your TV and let your sub pick up the lower frequencies. It would be a VERY unusual sub that could hit 600 Hz. I think you'll be disappointed with the results. I'd keep the Heresy intact and crossover to the sub at 100 Hz, or get a real center channel. While it would probably be better for your amp and would make the crossover behave as designed, I don't think inserting a resistor in place of the woofer is necessary. You would need a very high power resistor to ensure it didn't burn out. Squawker is a term coined by Mr. Paul, so we all seem to keep using it. John
  2. Happy Thanksgiving to all of you on the BBS, too. John
  3. The teflon insulation has less capacitance than PVC. That's why it's better. John
  4. A woofer's excursion increases as the frequency goes deeper. To test the phase of the woofer, use a 1.5 volt battery and connect it to the terminals. When the + terminal of the battery is connected to the + terminal of the driver, the cone will move forward. Normally the - terminal of the speaker wire connector is connected directly to the - terminal of the woofer and the active elements are on the positive side of the circuit. There is no reason for this, but it seems to be habit. Expect black wires from the crossover to be negative, but be sure to connect both speakers the same way. John
  5. '79 should be one of the best years. Check to see if the K-55-V has solder terminals. If it does they are the best of the early versions. Avoid the Type AL network. You can change the Type AL to a Klipsch Type AL-3, the latest rev. or to Al Klappenberg's crossovers. Al's crossovers are a just audible tad hotter on the tweeter section than the Type AA and noticably clearer. John
  6. JohnA


    Age certainlyreduces HF hearing in our noisy industrial culture. However, I prefer age to most known alternatives. John <50
  7. I have a set of ALKs in my rear channel La Scalas that had Type AL networks. They work very well. The tweeter is slightly hotter than the front La Scalas with Type AA networks; just enough to tell. I looked at it and decided I couldn't buy the parts enough cheaper to make building myself worth the trouble. John
  8. Heresies about the age of your Cornwalls, so they have the same squawker driver and tweeter, would be the best. I use a KLF-C7 with my La Scalas and it matches well. John
  9. The K-55-M was used by Klipsch until this year. E-V may not have made any new ones for several years and Klipsch may have been using stock-piled drivers. John
  10. Someone will have to take the lead and organize the trip. That someone will have to write some letters and e-mails to pull the trip off. I may just come back for another trip to Hope. The last one was a blast! John
  11. If there was a Type AL-2, I don't have it, but I have a copy of the others. I like the Type A and Type AA best. Watch the mail. John
  12. More Heresies would be the hot ticket! If you can't work in more Heresies, A KLF-C7 will work well for a center and I'd look at RS-3s for surrounds. I use a KLF-C7 with my 4 La Scalas and it is a pretty good match. John
  13. The RSW-15 was VERY impressive when used in a 5.1 system with Jubilees as mains, K-horns (or a series of Heresies) as rears and a Belle as a center. It had the output capability to match the Jubilees. When pushed really hard, its distortion was probably higher than optimum, but it was not objectionable. At sane levels it sounded nice and it could move air! I'd have one. John
  14. One good speaker wire per speaker is enough. Biwiring is running 2 wires from the same amp terminals to each speaker. The speaker must have 2 pair of terminals for biwiring. One pair connects to the woofer only and the other pair connects to the high frequency drivers. The theory is that large current flow in the bass cannot affect the high frequencies because they are carried in the other wire. I do not believe it is audible. John
  15. Tom is generally correct. You will enjoy the addition of subwoofers if they are high output and low distortion. I use 2 VMPS Larger Subs with my La Scalas. The subs are placed in corners and powered by an Acurus amp capable of more than 400 watts/channel. They seem to keep up pretty well and the distortion is low. The Larger Subwoofer has a 12" and a 15" active driver and a 15" passive radiator that's slot-loaded. John
  16. I have a poor copy. If you want to analyze yours it will be O.K. If you want to build a pair, it won't be much help. If I were you I'd build a pair of Type As or Type AAs. The Type ALs sound pretty rough. They have a midrange ring to them that makes French Horns sound like a howl. John
  17. Do your calibrations while seated in your "sweet spot' with the meter pointed at the ceiling at a 45 degree angle from vertical and facing the TV. Don't point the meter at any speaker. John
  18. Watch your Language! We don't need that kind of stuff here! John
  19. The square tweeter is a K-77-M. It was probably a replacement for a defective K-77. The K-77-M has more and smoother VHF performance. Only damp the back (out) side of the horns and don't remove the tweeter's magnet. It isn't supposed to come off. John
  20. You'll get a better answer in the Promedia forums. It does sound like an amp failure, though. John
  21. Ross has a valuable suggestion that will improve the value of the BBS. I like it! I especially like the voluntary, self-policing part of it. John
  22. Those are VERY new, so $400 pretty well qualifies as a steal. They would have sold for ~$1100 a pair. John
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