JohnA

The Cat5 I used had 4 pair per run, so that's 6 x 4 = 24 wires per "phase" (11 ga?). The braiding/twisting is to follow the theory that the intertwining cancels the EM Fields to reduce inductance. You could certainly try only braiding the last 3 feet.

Who postd the warning about an audio cable company? What was the company's name?

I did it! Sore Fingers. Use teflon insulated cable. Six runs is about equal to 11 ga. I twisted 2 runs and braided 3 of those. The solids become + and the dashed become -. Be careful so you don't short out the amp. These wires have excellent measured HF response, but I can't hear any difference.

Buy the factory service manual.

Also consider this. It has better tweeter protection than the Type A, with many of its attributes and premium parts.

Here are the schematics in 2 messages. I can't remember how to paste 2 in to one message. Some of the parts are reusable. The autoformers should be the same. If not, you can substitute the 3916 Al uses.

4 K-horns and a La Scala Center. La Scala rear center. No receiver, never; must be separates with high Class A bias. May be tube or SS, but you need a minimum of 50 watts for every channel. At least one of the biggest, harriest subwoofers you can find; Klipsch RSW-15 is the minimum, consider 2 of those. Others would work. Must have subs for proper LFE.

First off, a '75 Heresy has an AlNiCo midrange and tweeter that are self-shielded. They don't need shielding or bucking magnets and you can't use them either. The woofer should be a K-22-E with an unshielded ceramic magnet. It is the source of your problems. Try turning the speaker upside down (tweeter closest to the TV). If that doesn't work, you have 2 options: buy an old AlNiCo woofer from a 60s Heresy (seen on ebay) or bucking magnets. Bucking magnets are probably the cheaper option. I'm guessing the Klipsch tech is young and not versed in the older speakers. The things he described make it sound like he was confusing your Heresy with an HII. Klipsch Audio Technologies is in the unusual position of having properly operating products in the wild that are older than any of the employees.

The upper enclosures are SpeakerLab, not Klipsch. I can't tell about the bass horn.

Probably and yes. Vacuum cleaner and tooth brush?

Next time tell him yours are open. Al did some tests and said the iron-core inductor used in his Belle crossovers (and apparently the same one in yours) saturated and changed inductance at surprisingly low power. That is unacceptable. As to 14 or 12 ga., there is a point where diminishing returns intersects the weight of unloaded wallet. That's your call. In a simple crossover like the Type E, you cannot have little DCR. Lowering DCR increases the woofer's output, but the difference is surely less than 1 dB.

I don't recall a huge improvement in sound, but the design goal of making the Heresy sound like my La Scalas was achieved, as much as that was possible. I had 2 speakers tested at a local speaker manufacturer. Attached is the graph. The lighter blue line is my modified crossover. Somehow I did not get an impedance curve from it. The test was done indoors with the speaker facing the unfinished 12' ceiling of his commercial building. I don't know what to make of the curves except that they are useful for the differences. Oddly, the speaker generating the light blue line has the "superior" solder terminal K-55-V and K-77-M. The other Heresy has the spring terminal K-55-V and K-77. Except for 3 dB in the midrange, there is little difference. I don't know what happened to the -3 dB the tweeter circuit was supposed to show. Maybe the K-77's magnet is weak.

djk knows what they are. I believe they were an experiment, of sorts, by Atlas to build a "better"(cheaper?) K-55-V. Atlas changed something and I don't think Mr. Paul liked it. The K-56 may have led to the souring of the business relationship. I wish I could remember the story.

Here's the finished picture.

That sure looks like a T2A, on the right. Are you sure you haven't misread the tap numbers? My modified Heresy center sounds nearly identical to my Type AA La Scalas done like the schematic attached.

Lynn, What a great story! LOL! It's 2 AM and I'm laughing like a loon at the Farting Contest, too! At to the autoformer question, the image below is of a Heresy Type E crossover. The autoformer, aka transformer, reduces the voltage applied to the midrange and tweeter. The red lines show a mod to reduce the output further so that the 107 dB squawker and the 105 dB tweeter are more in line with the 95 dB woofer than Klipsch originally intended. This mod was intended for an easy test to see it they would then sound more like my La Scalas. They do. Each tap on the automormer is a 3 dB step. http://forums.klipsch.com/idealbb/files/TypeEExpr2.jpg

Your tweeters should be essentially the same, other than the dates. The schematic you listed is the esperimental version. If you don't have a T2A, you'll have to post some close-up pics so we can help figure out what you do have. If you have an AC voltage source, like an AC adapter (4 to 8V), it could be used to help figure out the taps on your autoformer. The crossover will have to be out of the speaker, of course.

Sorta like some lawyers?

In this case, it is. You'll hear!

Remove the backs and be sure the woofers are the same and both are K-33-Es. You can check their phase with a 1.5V battery. When the + of the battery is connected the the + of the driver, the cone moves forward.

LOL!

Capt'n, The K-77-M was used with the Type AA, so, if you change just the crossover and the K-55s, then they will be correct for the '78 or '79 to 'early '80 configuration.

Madisound.com has Hovlands, but PartsExpress has a line of polypropylene film and foil caps that may be just as good.

Roughly 1990. I don't think I've ever seen that factoid.