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Everything posted by JohnA

  1. JohnA

    1950s khorns

    Yes, your was updated to early 80s configuration (1982+). Good components, just not original. Please post pictures.
  2. JohnA

    Klipsch Survives Hurricane

    Yeah. Sometimes its overwhelming to me and I don't live here!
  3. The Palo Alto Church of Christ in Panama City was hit pretty hard by the hurricane last month. It could have been worse but now they are serving as a hub for recovery efforts. I found 3 KP-301s that had survived the hurricane in the gutted sanctuary! Gonna help them check them out next week.
  4. JohnA

    Synthetic Motor Oil.....

    No, that is not what a check valve does. A check valve prevents reverse flow. it would keep the filter full of oil to prevent a dry start.
  5. JohnA

    Synthetic Motor Oil.....

    The oil temp of my airplane (Piper Cherokee 6) ran 20F cooler with synthetic over mineral oil. My '87 Mustang and an '85 Taurus (both with limited idle speed control) both idled ~150 rpm higher with synthetic oil. My Kawasaki shifts gears with less force running synthetic oil. My '07 Colorado's oil change computer called for 10k oil changes on Mobil1 vs 3k on mineral oil. I run synthetic in just about everything, now.
  6. Your La Scalas have K-77 tweeters. They are E-V T-35s that carry a power rating or 1 watts continuous/10 watts program/120 watts peak above 3500 Hz with an unspecified crossover slope, but surely 18 dB or more/octave, like the Type AA and later networks have. I do not run K-77-Ms any more and other tweeters are more robust, but, especially the later K-77-Ms can be safely run at 3500 Hz and above, if you limit the power sent to them.
  7. Mr. Paul's mouth bracing. Note that the braces are not centered. I would have done this if I'd discovered the resonance before I had mine refinished. Yours are striking and quite attractive for raw birch. I'd be likely to just finish them with linseed oil or satin poly. There are lots of mods that provide genuine improvements, the bass horn braces would be one. New caps *IF* your speaker need them would be another. i just picked up a '68 H700 (Heresy) that did not need caps, though my '67 did. Let's prove they are in proper shape before heading down the rabbit hole. Checking ALL of the connections and the seal on the bottom access to the woofer should be checked, especially with your concern about bass output. Later, there excellent mods for the squawker horn and other areas. When you get around to replacing the capacitors, use film and foil. I have used metallized foil caps and have been satisfied, but film and foil is better and is what Klipsch used. You don't want to back up. Your solid wood walls are HIGHLY reflective at all frequencies. The insulation behind them will contribute nothing in audio frequencies because of the stiffness of the wood. It will be especially reflective in the middle ranges, contributing to your description of bright, hard sound. Compared to my 20 year experience with La Scalas, your room may be entirely the cause. Something as simple as Persian rugs (or a velvet Elvis, hee hee) hung in the right place can be enough to kill the first reflection/reinforcement in the midrange. I'm sure you can find a thick tribal style rug or 3. Changes to the room will always dwarf "improvements" to the speakers.
  8. JohnA

    AWR-650 Wiring Help

    Left and right, red to red, black to black.
  9. JohnA

    WTB MP3 Music Files

    LOL! I feel your pain! Put a NAS drive on your router and use. PM me for my address and send me a 64Gb thumb drive. I have old Journey, Trower, Waylon, Hank, Sabbath, Alice Cooper, BS&T, Boney James, Fallout Boy, W.C Clark, Celtic, Guy Clark, Marshall Tucker and Marshall Chapman, Tal Wilkenfeld, Diana Krall, Here Come the Mummies, Skynyrd, ..........
  10. JohnA


    Well, for what? If a speaker was designed without internal damping, adding it will change the cabinet tuning, making the woofer "think" the cabinet is larger. That will produce a ripple in its response at its lower limit and increase bass output a little below that lower limit.
  11. LOL!!! Those 1979 speakers were broken-in *years* before you got them and many on this Forum were born! Your walls are EXTREMELY reflective. At least turn them 45 degrees toward the center of the room and push them into the corner for the most bass output. Consider absorptive panels for the walls at the level of the squawker near the speakers. La Scalas have little output below 50 Hz, but are fairly flat from 60 Hz to 14k Hz. The bass horn is just not long enough for deep bass and it's mouth is small. If the music sounds recessed and behind the speakers, the caps are in need of replacement. It sounds like that is not the case for yours, so you can skip the cap replacement. La Scalas sound forward, alive and big, out in the room. Acoustic instruments will sound real, even in another room. They will ruthlessly reproduce the bad in a bad recording.
  12. JohnA

    Bargain La Scalas found in Dallas

    I'll take some of your kinda pain! Due to (my perceived?) differences in squawker output I'd install a set of Type AL-3s with nice caps in them and run them a (long) while. Type AAs will work best with K-55-V/Xs (PD-5VH, too) There are some nice tweeters out there and even nicer wooden tractrix horns, but they'll prolly cost you 3x what your speakers did! 😀
  13. JohnA

    Filter for La Scala, again..

    Type AA crossovers work VERY well when using K-55-V or K-55-X squawkers. Since you seem to have K-55-M squawkers, you will be better off with the crossover you have.
  14. JohnA

    '78 La Scala top hat grill factory???

    Yes, Grilles were an option, trimmed by 1/4-round from the factory. The grilles resembled the ones you pictured. Mine have the badge at the bottom center of the cloth.
  15. JohnA

    Advice for Beginners....

    The only inherent bias in double-blind testing is the refusal to accept the results. The OP excessively reduced the impact of electronics on the sound of an audio system, but compared to the effect of the devices that change the form of energy (electrical to mechanical, optical to electrical, digital to analog), most electrical components have a very small effect on sound. Even then only the electrical to mechanical change far outweighs the other forms of energy transformation, i.e. speakers and phono cartridges. Dropping below a quality floor, that is exceedingly difficult to define, the difference in sound becomes obvious, sorta like that $200 Pioneer (any Pioneer, really) or any Blose device. Excuses and finger pointing notwithstanding, the same applies above a level of quality. It is difficult to imagine audible differences between a $4000 McIntosh power amp and $30,000 worth of Mark Levinson amps.
  16. JohnA

    Help choosing phono cartridge

    https://www.lpgear.com/product/ATC01.html https://www.amazon.com/Audio-Technica-ATOC9III-Phonograph-Cartridge/dp/B002T6NZM8 You will not regret going with moving coils. The OC9s are higher output and can be used with more preamps.
  17. JohnA

    Speaker cables for Cornwall III?

    I like heavy gauge copper. I use banana plugs for convenience. While contact area where the wire is clamped is important to the resistance of the "system", there is not a significant difference between the contact area of the clamp in a binding post and a banana plug. Ya pay a little more for convenience. I actually run 11 ga braided CAT5e on the front 3. But I miserably failed a blind (ABX) test in Indy between braided CAT5 and some nasty looking test lead wire, to the apparent delight of some Klipsch engineers. Teflon insulated CAT5 when braided exhibits very low capacitance and inductance and using many strands lowers resistance making for a speaker cable with great measurements, but not so audible results. And they are a Huuge pain to build.
  18. Forte III over RF-7 after hearing both side by side.
  19. JohnA

    Raising P.S. Capacitance

    I still have the Technics SA-200 receiver I bought in college, and it still works, but with a little static in the knobs. I intend to re-cap it. It's 8 ohm rating is 25 wpc and its 4 ohm rating is 30 wpc. Typical of these amps, the heat sinks are small as are the P.S. caps. Recovery from clipping is audibly slow. The original caps are 35V, 6800 uF. If I have the power supply cap size increased, what will I do to the amp? There is plenty of room to add more Al plate for heat sink and looks like room for a pair of 25 x 80mm+ caps.
  20. JohnA

    Fairchild 260

    What's a Fairchild 260? Fifty watt mono amp, I know, but what else? Which are the output tubes? Class B? Worth saving? Worth about how much?
  21. JohnA

    Updating to Klipsh

    You could buy a pair of Cornwalls/Chorus/Fortes.
  22. You could try the beaded tool box liner.
  23. JohnA

    custom upgraded heresy, Ithica NY

    What an ugly cluster-----! Then there is the car auto sound deadener inside the cabinet. Run! .
  24. JohnA

    Budget Amp Suggestion for Heresy I

    Something like these, though I hate black: https://smile.amazon.com/dp/B00MXUCN0A/ref=twister_B00NB7Z7OI?_encoding=UTF8&psc=1 https://www.ebay.com/itm/YAMAHA-CA-610-STEREO-AMPLIFIER-SERVICED-NEW-LEDs/292754774280?hash=item44298b5908:g:xrAAAOSwMWpbtA-r https://www.ebay.com/itm/Vintage-Yamaha-CA-810-Natural-Sound-Stereo-Amplifier/113340454791?hash=item1a639e1787:g:TiEAAOSwnnlbl-~M:rk:15:pf:0