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Important new information (help if you can please): Changed prices of Zener diode. I found that there are two Zeners, and they are 10 watt chassis mount type. The part number for them is Microsemi Corporation 1N3998A, and they are readily available but are expensive. They are $30.71 each, and you need two so $61.42 per network or $122.84 per pair of networks. I would like to know what Klipsch uses now days for tweeter protection. Surely there is an alternative which isn't so expensive like a polyswitch in the KP-201 I have. Can you help:: ?? Is a crossover person here who could elaborate on a good tweeter protection that doesn't cost more than a pair of used networks would. Turning your AL crossover into an AA or AL-3 crossover or performing the "wdecho mod" on your AL. (This what wdecho has done with his AL's and he is very pleased with the results.) Lot's of folks are stuck with the "Notch Filter Happy" AL they don't like. Rather than throw money at it with new caps etcetera, perhaps you might consider modifying it to be an AA, an AL-3 or perform wdecho's mod on it? That's what this thread is about. Perhaps it would be more to your liking to simply snag a pair of used AA or AL-3 networks or buy some new improved ones or even build your own AA's. The important thing is that the decision is yours. Prices are as of July 2016 at Bob Crites' and Parts Express. Here they are. From cheapest to most expensive: wdecho's Modded AL (cost per pair of networks $19.00 plus shipping) NEW! ADD $122.84 if you need Zener diodes: [this is the AA but leaves the T2A transformer (-6db) and the 125mH on the tweeter] 1) woofer - remove the 2.5mH and 30uF 2) squawker - change the 8uF to a 13uF $8 each ($5-9 at PE for 12uF's) 3) squawker - remove the 2.7mH 4) squawker - remove the 2.5mH 5) squawker - remove the 8uF 6) squawker - remove the 8 Ohm 7) tweeter - remove 0.5 mH 8) tweeter - remove 125uH 9) tweeter - remove 2uF 10) tweeter - add two Zener diodes (if your crossover doesn't have one) $61.42 per pair for a network! Note: if you wish, you could buy a Crites AA re-cap kit ($96) per pair plus shipping with all new caps. If you need Zeners then I would recomend looking into the polyswitches used in the KP-201's wdecho's AL mod: AL to AA conversion (cost per pair of networks $97.00 plus shipping) NEW! ADD $122.84 if you need Zener diodes: 1) woofer - remove the 2.5mH and 30uF 2) squawker - change the 8uF to a 13uF $8 each ($5-9 at PE for 12uF's) 3) squawker - change the T3A to 3654 Crites $31 each 4) squawker - remove the 2.7mH 5) squawker - remove the 2.5mH 6) squawker - remove the 8uF 7) squawker - remove the 8 Ohm 8) tweeter - remove 0.5 mH 9) tweeter - remove 125uH 10) tweeter - remove 2uF 11) tweeter - add two Zener diodes (if your crossover doesn't have one) $61.42 per pair for a network! 12) tweeter - add 245uH (.25mH) $8 each Note: if you wish, you could buy a Crites AA re-cap kit ($96) and a pair of Crites 3654 autoformers ($62) and a pair of .25mH for a total cost of $174 per pair plus shipping with all new caps. If you need Zeners then I would recommend looking into the polyswitches used in the KP-201's. AL to AA conversion: AL to AL-3 conversion (cost per pair of networks $224.00 plus shipping): 1) woofer - change 2.5mH to 4 mH $21 2) woofer - add 2 - 68uF's $20 each 3) squawker - change 8uF to 13uF $8 each ($5-9 at PE for 12uF's) 4) squawker - change T3A to 3636 Crites $35 5) squawker - remove 8uF 6) squawker - change 2.5mH to 5mH $24 7) squawker - remove 8uF 8) squawker - remove 8 Ohm 9) tweeter - remove 1N3996 10) tweeter - add RDE 050 (varistor) $4 Note: if you wish, you could buy a Crites AL-3 re-cap kit ($123) and a pair of Crites 3636 autoformers ($70) a pair of 5mH's a pair of 4mH's and a pair of varistors for a total cost of $291 per pair plus shipping with all new caps. AL to AL-3 conversion: Thanks to wdecho, Bob Crites, and Matthews for helping create this thread... Oh and indirectly wvu80 gets some credit too.