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Everything posted by JohnA

  1. LOL! I simplified. Down to only 5.0.4 and only 2 Heresy IVs in my computer room.
  2. I would say something similar, but it didn't take me that long to notice a resonance/howl in the common range of a French Horn that I found very annoying when listening to 1986 AL La Scalas in the same room with '81 AA La Scalas. My brother has the ALs, now. 😁
  3. La Scalas from 1985, would have many mods to properly use AL5 crossovers. Please do post pics!
  4. It is not my intention to start a kerfuffle, but, .... Now that things and time has passed, is there any possibility of examining the records that NMSU posses and perhaps copying some? It is a shame there is animus between groups that both want to preserve the legacy of Mr. Paul and do it honestly. Could another party mediate? Perhaps an explanation of the issue, depersonalized, would help.
  5. Some Pro "subwoofers" have high pass filters. The box tends to limit the LF excursion well enough, but at only 6 dB/octave. Most music had very little energy below the 41 Hz low E of a bass, further limiting the need for a woofer high pass filter.
  6. I'd say almost all. I would not choose them over my old La Scalas, never mind K-horns of Jubilees. I have found them boomy with recessed vocals and pretty hot somewhere around 4k. Certainly no more low bass output than a La Scala. Mr. Paul compared the frequency response of the La Scala to a "well known theater speaker" in a paper published on the "new" La Scala. I have always suspected it was the A7 and it falls well short. I used the A7's horn and driver in a home-made system similar to my La Scalas. That treble horn/driver has some nice attributes and it's smooth sounding, but lacks the shimmer the K-77-M gives.
  7. JohnA

    SC Estate Sale

    Several Heritage parts, at least one Jubilee. https://www.estatesales.net/SC/Woodruff/29388/3395955/127591818
  8. I read an paper discussing foam around the mouth of audio horns to absorb reflections/diffractions. Since many foams are short lived and too thick, I used 3/4" felt. Clean and easy and it's been there since 2000 or so. Other things made more audible difference, but I'm still a little subject to audiophoolery. 🙃
  9. The very opposite is true. People run Cornwalls with 2 watt tube amps. You have a room placement issue. They should be at least against the wall and as least as far apart as the listener is back from them. There could be other issues with the room, too. Cornwalls do not lack bass unless a woofer failed. Check and turn off all EQ in the receiver and set the speaker size to "Large". Set the receiver to "No Subwoofer" and 2 channel only until you add other speakers. If there is an adjustment, set the speaker impedance setting to 4 ohms so the amp will deliver the current the 4 ohm woofer needs. Listen a while before changing the caps to be sure they need them. Do not use cheap caps; each one should be a film and foil cap and you should expect to spend $70 each, or more, to provide the quality the speaker deserves. Metalized foil caps will sound gritty. I will recommend lining the openings for the squawker and tweeter with heavy felt to absorb reflections off that edge. Perhaps unneeded, but lining the woofer opening won't hurt. Unless your F-I-L intends to so with surround sound, a stereo receiver would be a better, and simpler, choice.
  10. I did not want to modify my H-700s, so I bought these and finished them with polyurethane. The worked very well. https://www.madisoundspeakerstore.com/full-range-speaker-kits/fostex-bk-16-angle-stand-each/
  11. I've been using braided CAT5E for speaker cable for 22 years(!). Must be wore out by now, what with knocking electrons out of their orbits for that many years! 😁 I am currently listening to a Technics SA-300 from '79 that I had recapped. That's probably all yours needs. The SA-200 I bought in college is in the garage driving a pair of Auratone 5CTVs.
  12. LOL! Speed density EFI could also adapt using the O2 sensor and Intake Air Temp sensor, so it was not so dire as that. Add in that the WOT A/F ratio was 12 to 12.5:1 and the best power mixture is almost always 13.2:1, a *little* leaning is a good thing. BTDT with mt '87 Mustang GT. I measured EGTs on each bank to get an independent (cheap) look at WOT leanness. Off topic, so I'll also say, it's still a Mustang.... And I have decided metalized polypropylene caps sound subtly gritty. 😉
  13. You can parallel resistors to raise the wattage limit. The resistance will have to be higher to use them in parallel.
  14. Most likely a function of wave length vs. riser height and marketing/speaker design.
  15. In general, if you can hear the sub, it's 10dB too loud. At +5 dB, my system sounds "impressive" without the subs being obnoxious. You really ought to get a sound meter to accurately setup the sub(s).
  16. The top one is NOT Klipsch. The other one is an HIP, for Heresy Industrial Ported. The woofer is an E-V EVM-12L or Eminence copy and gets to 102 dB/w/m in the midrange. So, the crossover network ("Balancing Network") is a slightly Modified Type AA that was used on the K-horn/La Scala/Belle Klipsch and the squawker and tweeter are the same as the Big 3. They are quite bright, but excel outdoors and in Huge rooms.
  17. I like it! I just happen to have 2 unused K-700s. How did you adapt the socket to the horn's threads?
  18. How about a wall mount? https://www.amazon.com/Monoprice-Profile-Capacity-Speaker-Brackets/dp/B00KFSP82C/ref=sr_1_3?crid=2LQ0UTW1QBA4H&keywords=speaker+wall+mount&qid=1656618366&sprefix=speaker+wall+mount%2Caps%2C102&sr=8-3
  19. The rotation angle of your preamp's volume control has little bearing on actual power output, though that is unusually high. To figure the sound level in your room, 1 watt is 98 dB at 1 meter Add an amp and another speaker +6 dB, 104 @ 1m Double the distance to 2m (6.5 feet) is -6 dB, 98 dB Double again to 13 feet, -6 dB, or 92 dB, @ 1 watt, plenty loud for peaks and a 20 watt amp still has 13 dB of headroom for Flim and The BBs. I sit almost 13 feet from my La Scalas. You won't lose quite 6 dB/doubling of distance in a reverberant field (room) so this exercise is conservative.
  20. Very cool MicroMara, Where might I find such smart phone speakers?
  21. JohnA

    AR La Scalas

  22. I added 4 killer subs. La Scalas need low distortion bass below 60-ish Hz. The DJK mod needs a sharp LF filter and some EQ to stand out. Adding 1 to 3 dB (without the filter and EQ) below about 70 Hz helps, but is is not significant.
  23. That is a question best asked of Al. Will he respond?
  24. Keep pumping the dub step! My new H4 woofers took at *least* 72 hours at tolerable volumes to loosen up so they sounded like the ones I heard in Hope. Have you considered that the old cones were too loose?
  25. I have never heard H2s or H3s, but everyone I know at Klipsch says the H3 woofer is a nice upgrade to the 2s. Supposedly the H4 woofer is the same. Were I serious about upgrading now that I've had H4s for a year+, I'd go with the H3 kit (new caps/inductors) and look about adding volume and a port to make my own H4. A small box added to the rear with a port into the original cabinet ought to do it. Perhaps ClaudeJ1 will help you with the calculations.
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