edzu1234 Posted May 31, 2022 Share Posted May 31, 2022 EXPERTS ONLY PLEASE!---Will ALK AP12-500 Crossovers work seamlessly in my stock 1980 La Scalas?? Thank you in advance for your expert input! Quote Link to comment Share on other sites More sharing options...
bribassguy Posted May 31, 2022 Share Posted May 31, 2022 This is such an easy thing to google... http://www.alkeng.com/ap12_xo.html The AP12-xx series networks are designed to operate with the Klipsch K33 woofer which represents an impedance of 6 Ohms in series with 1 mHy voice coil inductance. AP12-500 This one is intended for the Belle Klipsch or the La Scala. The crossover is at 500 Hz. AP12-600 This one is intended for the Belle Klipsch or the La Scala using squawker drivers or horns that will not safely go down to 500 Hz. Quote Link to comment Share on other sites More sharing options...
Deang Posted May 31, 2022 Share Posted May 31, 2022 Be aware that the AP12 series is only half of the network. It's for the woofer/squawker transition. You need the AP15-6000 or ES-5800 to complete the network. 2 Quote Link to comment Share on other sites More sharing options...
edzu1234 Posted May 31, 2022 Author Share Posted May 31, 2022 Hello Crankysoldermeister, Thank You very much for the "HEADS UP". This puts things into a different prospective. It's nice to have EXPERTS like YOU giving us SOUND ADVICE!!! Quote Link to comment Share on other sites More sharing options...
Deang Posted May 31, 2022 Share Posted May 31, 2022 I'm not an expert, but thanks. 1 Quote Link to comment Share on other sites More sharing options...
Curious_George Posted June 7, 2022 Share Posted June 7, 2022 On 5/31/2022 at 9:58 AM, bribassguy said: This is such an easy thing to google... http://www.alkeng.com/ap12_xo.html The AP12-xx series networks are designed to operate with the Klipsch K33 woofer which represents an impedance of 6 Ohms in series with 1 mHy voice coil inductance. AP12-500 This one is intended for the Belle Klipsch or the La Scala. The crossover is at 500 Hz. AP12-600 This one is intended for the Belle Klipsch or the La Scala using squawker drivers or horns that will not safely go down to 500 Hz. In this case Google is the expert… Quote Link to comment Share on other sites More sharing options...
John Warren Posted July 4, 2022 Share Posted July 4, 2022 On 5/31/2022 at 9:58 AM, bribassguy said: The AP12-xx series networks are designed to operate with the Klipsch K33 woofer which represents an impedance of 6 Ohms in series with 1 mHy voice coil inductance. Really? 1 Quote Link to comment Share on other sites More sharing options...
Deang Posted July 4, 2022 Share Posted July 4, 2022 “Loudspeaker people don’t understand how crossovers work.” -ALK I gave up trying to convince him it didn’t work the way he thought I do like the Universal. It’s the only thing he designed that made any sense to me, but I build it with a 2.5mH low pass coil. Quote Link to comment Share on other sites More sharing options...
John Warren Posted July 4, 2022 Share Posted July 4, 2022 24 minutes ago, Crankysoldermeister said: “Loudspeaker people don’t understand how crossovers work.” -ALK Here's the Z of the Klipschorn bass unit (alone) measured by yours truly some years ago. The plot starts at 10Hz and ends at 1kHz. Below is Heyser's plot from the Audio magazine review article where he measured the 3-way system and plotted the result. The loop in the middle is the bass section, similar to what's shown above. Here's the alk plot using his Klipschorn "emulator". Here's the contraption. 1 Quote Link to comment Share on other sites More sharing options...
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