JohnA

AK-3 schematic; not much difference. I believe the tweeter protection MAY have been left out of these drawings.

AK-2 schematic. Type AK-22.pdf

I have not hear either the AK-2 or AK-3, so I cannot tell you if it is a noticable change or not. The people I know change their diaphragms after they fail. That's an easy decision. Sometimes you can hear the voice coil rubbing before it fails. That is another sign it needs replacement. If you have K-77s with the original diaphragms, they are rated at 2 continuous watts and 20 peak watts. The K-77-Ms are rated at 5 watts continuous and 50 peak watts. All replacement diaphragms now have ribbon leads to the voice coils and the 5/50 watt rating. I don't believe replacing the diaphragms will increase output. If you have the AlNiCo K-77, it may have lost some magnet strength. AlNiCo can be remagnetized to full strength by a special machine. I only know of one such machine in the U.S., though. On another topic, can you translate "testastretta"? It is a term Ducati uses describing their engines.

I've heard of the 1RB and seen pictures. It doesn't seem common. It was used beyween the K-500-5000 and Type A. I would have thought a '65 model would have had Type A.

I don't see no Bad English! There is probably not much you can do to increase the tweeter output over the AK-2. High quality capacitors like Solen or Hovland will reduce losses so that the maximum signal gets through the filter and may help by a fraction of a dB. However, the premium caps will improve clarity more than anything else. The ALK crossovers will do the same thing; I have a set. Mine were built by Al and were not home-made from low quality parts. Perhaps your room has too much soft furniture and drapes (curtains). Those things absorb high frequencies a lot.

I recognized some of the parts, but couldn't remember what bike they went with. Both look great!

Flason, Great job on the K-horns! You should really enjoy them. Now, tell me about the bikes.

OR, you could use Mozilla (free) and never get a pop-up, worm, or adware. It has no mechanism that allows worms or adware and it's pop-up blocker is nearly perfect. I hate to borrow someone's PC and be forced to wade through the pop-ups in IESux!

Y'all post pictures. I have an interest in picking up a single Shorthorn to try to make an old-fashioned mono system.

Nancy. Tall and Blonde.

The problem is the compressed mp3 format. I want to go the other way with 24/192 DVD audio. "More Data, Mr. Scott!" More sampling, less smoothing, make it sound like vinyl, but with no pops and direct access to any song or any playback order.

Yes, one set of xovers I use in my La Scalas have had all of the caps replaced with Hovlands. I have an air-core inductor for the woofer but have been too lazy to install it. The comment about the inaudible difference when changing the squawker cap comes from the La Scalas; inaudible to me, at least. The Heresy crossovers are like the ones in the pics, with modern caps and inductors.

I think you might hear a difference (a good difference) by changing the tweeter cap. I really did not notice a difference between the motor-start cap and Hovland on the squawker circuit. Modern design is to have all 3 circuits parallel rather than feeding the tweeter from the squawker cap.

The screws that ho;d components don't hold anything else. There are 4 screws that are behind stuff that hold the board to the cabinet.

I put Hovlands in my Type AAs and love the result. I don't know how Auricaps are made, but better caps AND inductors help the Type AA. The Type A is a good design, but should not be used with a large amp, since accidents always happen.

I had a Yamaha CA-800 for YEARS. It was warm and smooth with my La Scalas. The bass was a bit loose, compared to the Parasound amps I have now, but it did sound very good. It could be switched to Class A and had 8 wpc. In Class A, it sounded a little bit better. The tone controls, filters, tape facillities are all great. It was 2-channel, of course

"3db then needs to be subtracted for every three feet one moves back from the speakers." Dean, this is one of your errors. SPL drops by 6dB with each doubling of distance, IIRC. The other is that your Rat Shack meter (and mine) cannot HOPE to display musical peaks that are just a few dozen milliseconds long. It is not unbelieveable to me that there are peaks 10 dB above the RS meter peak, since it is so "slow", even on the fast setting.

It may not be as hard as you think. Wher you get them, remove a tweeter and look for a string of numbers on the back, maybe in ink. Part of the number is the OEM and part is the manufacturing date. With that you can start a search for new one, recone kits or engineering data to be used to select a replacement. Let's hope the OEM still exists.

Al doesn't work for Klipsch! They would have to buy his design. I'm sure they feel they can do better for less money. Al's crossovers make little concession to cost. The Type AK-3 is said to sound much like the ALK and vice-versa. Due to driver changes, I'm not sure the ALKs would be a good substitute for the AK-4.

That's it and here is a pic of the finished product. I doubt if I published a list of components, but as you can see the inductor and black caps are Solen, the tweeter cap is a Hovland and there is a 1 uF Harmony bypass. The Solen/Harmony pair is my brother's idea. This xover makes a Heresy sound very much like a La Scala, though not exactly the same.

Probably not. The theory is that the AlNiCo reacts differently (can't remember how) to the magnetic fields induced in magnet structure by the current in the voice coil. I can't verify, or dispute it, but I'm not buying just the same.

My Preacher is quick witted, too quick. I gave the church a pair of HIPs (Heresy Industrials). When I carried them in, I apologized for bringing Heresy into the church. He fell right in and ran with it! He said he was sure I could be forgiven.

It sounds like the market demand thing happened to the rumoured "horn amp" from Aragon. That's too bad. I was hoping to be forced to start an amp fund for it. I don't have any bright ideas for marketing the Heritage stuff. As for the electronics, you'd have to "lease" some Aragon equipment to them to be sure they were demo'd well. You might even have to set up the systems. When I win the lottery, .......

That's great news, Jim! We might miss you, but have better things to do.

John! You missed the Heritage demonstration? The AK-4 and the ALK crossovers use film and foil capacitors, probably the best kind. They materially contribute to the sound clarity. The ALKs go another step and use air-core inductors and even Litz wire inductors for the tweeter. Generally, the advantages of these crossovers come from the high quality parts used. The Type A through Type AK-3 used paper and foil in oil motor-start capacitors. I replaced the caps in my Type AAs with Hovland film and foil caps ans like the result, at least on the tweeter; noticible clarity improvement.