JohnA
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Posts posted by JohnA
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The Heritage series crossovers underwent several iterations with the "modern" set of drivers. The original Type A was used in the K-horn. Type AA was used in KH/B/LS. Then Type AB/AL/AK was used in the corresponding speaker. Next, there was a Type AK-2 and AB-2, but maybe not an AL-2. Next, was the AK/AL-3; I've never heard of an AB-3. Now the new ones likely have an AB/AL/AK-4 network. Al's network has been nicknamed Type ALK; it can replace anything from Type A to Type Ax-3, or the entire A-series of networks except perhaps the Ax-4 network. I'm sure he's working on that.
John
This message has been edited by John Albright on 04-17-2002 at 05:49 PM
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I'll bet you won't hear much difference at all. Bi-amping first started when amps were small and speakers were generally inefficient (the 70's). It gave you more power/channel. It was then discovered that a good electronic crossover could improve the sound quality by removing the reactive elements in the passive crossover.
Crossover parts are a lot better, now. And, your KLF-30s are so efficient that you will be hurting at 10 watts out of the 140 the Parasound produces. You will never tax the power amps in your receiver, so I doubt the Parasound will do you any good at all. If the receiver's power amps are so poor you hear a big difference with the Parasound, then your preamp section is also suspect. The better use of the Parasound is to hook it to a HT Pre/Pro.
John
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Tom,
Be patient with ebay, a pair will show up after a while. Altec 511Bs could also be used and some say they sound better. I haven't bought any adapters to try them, yet.
Builder,
This LB-76 you mention; is it a narrow (about 18" wide), tall "J" bass horn or "scoop" with a Belle squawker horn and K-77 tweeter? Did it have optional wings to improve bass performance? The patent date for that was 1979. That's why the -76 confuses me. The '79 patent bass horn is the subject of an inquiry of mine. I toying with having a pair made for rear surrounds. I'm guessing it is taller that a La Scala and would be able to "see" over my furniture.
John
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You need an amplifier for every channel. I also think the B&K will sound a little bit better than your Yamaha, but very little. I wouldn't spend the money to buy an add-on amp unless you also buy a better Pre/Pro to feed it.
John
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Munghkiman,
You're going to have to post pictures. Do your La Scalas have an open top like the attached?
All 4 of my La Scalas have 15" K-33-E woofers, even though 2 have square magnets and 2 have round magnets. One pair is mismatched and was made in 1981/1982; the other from 1987.
Tom,
The La Scala requires the K-400 or K-401 squawker horn. The bass horn cannot go much higher than 400 Hz. I hope to test one to see how much higher, soon. The K-700 horn in the Heresy is intended for 700 Hz and above, so it is unsuitable for use in a La Scala. It cannot play low enough to match the bass horn. The K-401 is available new from Klipsch. Both sometimes show up on ebay. Most Heresies used the same squawker driver the KH/LS/B/C used from the same year. It unscrews from the horn and will thread onto the K-400/401 horn.
A very early La Scala, perhaps the prototype, used a 12" woofer. It's in the Museum at Hope.
John
This message has been edited by John Albright on 04-15-2002 at 11:46 AM
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If they are in good shape (all drivers work and are undamaged, the cabinets are not ratty and chipped up (2 or 3 small chips are to be expected) and the finish is well done or in original factory condition) $1000 is a fair price. Deduct as appropriate for non-working drivers. All of the drivers can be overhauled rather than replaced. Plan on about $50/tweeter and $75/squawker and woofer. The crossovers are probably not bad.
Be forewarned, La Scalas don't reproduce deep bass. They will go down to 50 Hz in a corner and that's about it.
John
This message has been edited by John Albright on 04-14-2002 at 03:18 PM
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There is a Promedia Forum that will give you answers. This is the Home Audio Troubleshooting Forum.
John
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Mungkiman,
Can you post pictures? I can scan and post photos if you want. La Scalas ARE nailed and glued together, but there is a woofer access plate on the bottom that is held on with 12 screws. It looks like a riser to some. Are they black lacquer, or covered in black wrinkled vinyl? What is the model name, LS-BR, LS-BL, LSI-xx? If so, the access plate is the bottom plate. No cutting required. I've never seen the bottom of an LSI, but *Klipsch* would never have made a speaker that couldn't be serviced.
John
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I missed the nailing part. That Sucks!
John
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You will likely have 10 times the power needed for Klipsch speakers. Since you have RP-3s I doubt bi-wiring will provide any benefits at all. The woofer is self powered so you essentially have a bi-amped speaker system with only one set of speaker cables,
John
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There is no cutting required to get the woofer out of a La Scala. The botton plate unscrews and comes off.
The only place to get K-33s is from Klipsch. Eminence cannot sell them directly. Klipsch only charges $110 each.
John
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The new squawker and tweeter are both less efficient and have a little less max. output. The difference in efficiency is about 1.5 dB, I'm told. They may not have the power handling capability the old ones had.
John
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M.H.,
There cannot be too much difference between the La Scala and Belle. The Belle squawker crosses over 100 Hz higher than the La Scala's 400 Hz. In many years both used the same crossover and they have always used the same drivers in the same year. I lack proof, but I believe the Belle's bass horn is capable of going higher because the effective bend radius is longer than the La Scala's (it is bent more gently). That should make up for the shorter squawker horn. That shorter horn should also be less prone to ringing since it shorter length makes it effectively stiffer.
John
with 4 La Scalas
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It would depend entirely on the ribbon and horn in question. The Heritage tweeters only go up to 17K.
John
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You'll have to move the RC-3 farther from the TV. You need to do it just to comfirm the TV is inducing the hum in the speaker. Also try rerouting the speaker wire to the RC-3.
John
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As best as I can remember, it's about +15%.
John
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The K-55-X is so close the the late K-55-V it would scare you. They are still using the K-401 horn. The throat hasn't changed, it's still 1" and the voice coil is still 2". I'll bet that is what you saw. The K-55-X is made by the same outfit that made the K-55-V, but has a new name.
John
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Hi B,
I think I saw him! Just wait till I get to complain about my flickering power switch and hissing processor!
Just kidding! When are you moving? A commute that long stinks!
John
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As long as you don't drive the car amp into distortion there will be no damage at all. However, power amp ratings on car amps are notorious for being overstated. In addition, car amps are rated at 4 ohms or even 2 ohms, but your La Scalas are about 8 ohms.
A car amp rated at 150 watts per channel into 4 ohms would pull over 17 amps. Does it have 2 10 amp fuses? If not, it won't put out 150 watts/ch.
Assuming typical peak power ratings, a 150 watt/ch amp will put out 37.5 watts RMS into 4 ohms and half that into 8 ohms. 19 watts/channel will not make La Scalas rock outdoors. 37.5 watts is about 3 amps into 4 ohms. Does it have two 3 or 4 amp fuses?
Still, as long as you can't hear distortion, you won't hurt anything. Should you actually have 150 watts RMS/ch, you will have plenty of power, as long as the battery lasts.
John
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Al's crossovers primarily use better components. In fact, they are pretty much the state of the atr, hence the price. The crossover points and slopes remain about the same as the AK/AL-x series. The tweeters have less protection, but fewer components to interfere with the sound. The impedance curve is pretty well flat from about 80 Hz to 20k. Al uses a trick with a resistor to control the impedance in the midrange so it doesn't get so high. That should be good for tube amps. The Klipsch networks tend to have more losses in the tweeter circuit so Al's networks sound a little hotter.
I prefer them to the Type AL by a long margin.
John
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I see new drivers and different crossover frequencies! The K-horn and Belle crossover to the squawker is 450, but the La Scala is still 400, curious.
John
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According to BobG, some time ago, the tweeter in the C7 is actually turned wrong for horizontal use. If you turn the speaker on its end, vertically, the tweeter has the intended dispersion pattern. He encouraged me to look at a pair of C7s for my rear channels. I founs a second pair of La Scalas cheaper, in the end. i say go for it!
John
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It looks like Tom has several nice money pits!
My favorite Colt is a Series 80 Satin Nickle Gov't, Model. I've only seen the one. Most people have never seen one. I also have a DW 41V with 4" and 8" bbls. Shoots great! I could never get a handload to work well in it, though. I always had unburned powder left and poor groups. When a Ruger Blackhawk in .44 Mag. hurt my hand, I bought the .41. It turns out a .41 Mag. has more energy than some .44 loads.
John
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O.K. Dean,
Let's have it, Dish. I remember BobG mentioning the Super Klipsch, but I thought that was the Jubilee. Tell us about elaborate cabinet designs!
John
Published Response Curves for older speakers
in 2-Channel Home Audio
Posted
Ray,
I know you didn't generate any of these, but why should there be any difference betweet the K-horn, La Scala, and Belle above 500 Hz? They used the same drivers and crossover for most of their lives. Even after the crossovers began to diverge, they only had minor differences.
John