Robbie010 Posted April 29, 2020 Share Posted April 29, 2020 A new, more powerful amp has me thinking about the tweeter protection of the Type AA crossover. Is there a guide on how to change a Type A to a Type AA to protect the K77 tweeter? Thanks Quote Link to comment Share on other sites More sharing options...
geoff. Posted April 29, 2020 Share Posted April 29, 2020 I am leaning towards a new pair of tweeters. There are two options that immediately come to mind. I already have one and love it and heard nothing but positive reviews about the other. Quote Link to comment Share on other sites More sharing options...
JohnA Posted April 29, 2020 Share Posted April 29, 2020 The change is easy. Just add water and stir! This is the crossover design I listen to all day. I used a spare screw for the .35 inductor because I wanted to see if I liked it. As happens, temporary becomes long lasting. Modify your tweeter circuit to match this, and a Type A becomes a Type AA (without zener diodes, the KLiP tweeter protection). I recommend adding the inductor shown to knock the K-55-Vs 9k response "bounce" down a little and maybe balance the squawker's phase shift from the high-pass cap. If your tweeter circuit connects downstream of the 13 uF cap, no worries, that is the original Klipsch design. When I had to replace my caps 18 years ago, I changed it, not understanding how it worked and thinking it was weird. The Type AA also EQs a 105 dB hump in the K-77/T-35's response down to 103-104. I think you'll like that, unless your room is dead. 1 Quote Link to comment Share on other sites More sharing options...
JohnA Posted April 29, 2020 Share Posted April 29, 2020 What is your new amplifier? Quote Link to comment Share on other sites More sharing options...
codewritinfool Posted April 29, 2020 Share Posted April 29, 2020 23 minutes ago, JohnA said: Lol, what happened to that poor zener, John? Looks like it is hanging out taking a smoke break. 1 Quote Link to comment Share on other sites More sharing options...
Robbie010 Posted April 30, 2020 Author Share Posted April 30, 2020 40 minutes ago, JohnA said: What is your new amplifier? I’m switching beyween two at the minute, a Bluesound Powernode 2i At 60w a channel and a Trilogy VTi, again 60w a channel. 1 Quote Link to comment Share on other sites More sharing options...
jimjimbo Posted April 30, 2020 Share Posted April 30, 2020 I much prefer the AA to the A network. Have listened to both high end and "budget" mods to both and had the same conclusion each time. 2 Quote Link to comment Share on other sites More sharing options...
twistedcrankcammer Posted April 30, 2020 Share Posted April 30, 2020 35 minutes ago, jimjimbo said: I much prefer the AA to the A network. Have listened to both high end and "budget" mods to both and had the same conclusion each time. Hi Jim, I know the K-42 came in HIP's, was it ever in any non poeted versions of the Heresy or have you ever tried it out in a non ported configguration, and if you have, what are your thoughts on doing so ?? Also, the "E" crossover seems a little lightweight, has anyone changed the crossover points on an AA to be used in a Heresy or am I just nuts here ?? Roger Quote Link to comment Share on other sites More sharing options...
jimjimbo Posted April 30, 2020 Share Posted April 30, 2020 Doesn't seem to me that the K42 was in any non ported config. Hoping someone jumps in here and says that was a political post and I'm close to being banned..... Quote Link to comment Share on other sites More sharing options...
twistedcrankcammer Posted April 30, 2020 Share Posted April 30, 2020 6 minutes ago, jimjimbo said: Doesn't seem to me that the K42 was in any non ported config. Hoping someone jumps in here and says that was a political post and I'm close to being banned..... Jim, Thanks for the reply Jim, I have found a pair of nice K-42's and you have about as much Heresy experience as anyone.... Any thoughts on a better way to do crossover than the stock "E" settup in my daughters slant monitors ?? Roger Quote Link to comment Share on other sites More sharing options...
ZEUS121996 Posted April 30, 2020 Share Posted April 30, 2020 32 minutes ago, jimjimbo said: Doesn't seem to me that the K42 was in any non ported config. Hoping someone jumps in here and says that was a political post and I'm close to being banned..... I just had a friend get a 30 day timeout on FB, I'm sure with the proper language you too can take some more time off too. Looks like you could use a little time off, maybe the gnats will go away. 🙄🙄🙄 Mark Quote Link to comment Share on other sites More sharing options...
Robbie010 Posted April 30, 2020 Author Share Posted April 30, 2020 19 hours ago, JohnA said: The change is easy. Just add water and stir! This is the crossover design I listen to all day. I used a spare screw for the .35 inductor because I wanted to see if I liked it. As happens, temporary becomes long lasting. Modify your tweeter circuit to match this, and a Type A becomes a Type AA (without zener diodes, the KLiP tweeter protection). I recommend adding the inductor shown to knock the K-55-Vs 9k response "bounce" down a little and maybe balance the squawker's phase shift from the high-pass cap. If your tweeter circuit connects downstream of the 13 uF cap, no worries, that is the original Klipsch design. When I had to replace my caps 18 years ago, I changed it, not understanding how it worked and thinking it was weird. The Type AA also EQs a 105 dB hump in the K-77/T-35's response down to 103-104. I think you'll like that, unless your room is dead. Thanks John. I’ll need to get the crossover in front of me to really understand how this works but from what I can see, all I need is another 2uf cap, a .35 mH inductor and a 245 uH inductor. One last question, is there any specific type of inductor I need - air core, iron core etc? Quote Link to comment Share on other sites More sharing options...
jimjimbo Posted April 30, 2020 Share Posted April 30, 2020 17 hours ago, twistedcrankcammer said: Any thoughts on a better way to do crossover than the stock "E" settup in my daughters slant monitors ?? Update the caps, that should be fine for what you want to do. 1 Quote Link to comment Share on other sites More sharing options...
JohnA Posted April 30, 2020 Share Posted April 30, 2020 Robbie, use air-core for both. A Litz wire inductor for the 245 uH may make a small improvement. They measure a little better at those frequencies, anyway. Klipsch did not use Litz. Yes, all you need to do is add 3 parts. Note that the .35 mH inductor is my mod and not part of a true Type AA. Quote Link to comment Share on other sites More sharing options...
JohnA Posted April 30, 2020 Share Posted April 30, 2020 18 hours ago, twistedcrankcammer said: Also, the "E" crossover seems a little lightweight, has anyone changed the crossover points on an AA to be used in a Heresy or am I just nuts here ?? Roger Roger, the Type HIE is a Type AA modified for the K-700 horn and K-42. 1 Quote Link to comment Share on other sites More sharing options...
JohnA Posted April 30, 2020 Share Posted April 30, 2020 20 hours ago, codewritinfool said: Lol, what happened to that poor zener, John? Looks like it is hanging out taking a smoke break. Nah. It is out of Vitamin V. 1 Quote Link to comment Share on other sites More sharing options...
OO1 Posted April 30, 2020 Share Posted April 30, 2020 19 hours ago, twistedcrankcammer said: Hi Jim, I know the K-42 came in HIP's, was it ever in any non poeted versions of the Heresy or have you ever tried it out in a non ported configguration, and if you have, what are your thoughts on doing so ?? Also, the "E" crossover seems a little lightweight, has anyone changed the crossover points on an AA to be used in a Heresy or am I just nuts here ?? Roger ------you can add on a port ala Claude Super Heresy , since his design does use a non-ported Heresy cab , but he adds it to the rear section instead of the frontal on the motorboard -----remember that the new Heresy 4 - also uses a rear port ------and that added a 10hz to the bass over the H3 , now Claude also uses the K42 ,Whether the EVM12L or the Eminence woofer ---the DELTA PRO 12A is a 3rd option ---- Super Heresy 1 (Baby Cornwalls Mod.) By ClaudeJ1, May 28, 2014 in Technical/Modifications 1 Quote Link to comment Share on other sites More sharing options...
twistedcrankcammer Posted April 30, 2020 Share Posted April 30, 2020 49 minutes ago, 000 said: ------you can add on a port ala Claude Super Heresy , since his design does use a non-ported Heresy cab , but he adds it to the rear section instead of the frontal on the motorboard -----remember that the new Heresy 4 - also uses a rear port ------and that added a 10hz to the bass over the H3 , now Claude also uses the K42 ,Whether the EVM12L or the Eminence woofer ---the DELTA PRO 12A is a 3rd option ---- Super Heresy 1 (Baby Cornwalls Mod.) By ClaudeJ1, May 28, 2014 in Technical/Modifications Thanks for the info, but this is for a Klipsch Pro Slant Monitor Heresy. Don't know how I would add a port and don't really want one. I plan on having a horn sub built for her, so I am not really looking for low Bass out of these Heresy. Was more so hoping the K-42 would add more and better Mid Bass like the K-43 does over the K-33 for her LaScalas... Am I nuts in thinking / hoping for this Jim, anybody ??? Roger Quote Link to comment Share on other sites More sharing options...
OO1 Posted April 30, 2020 Share Posted April 30, 2020 4 minutes ago, twistedcrankcammer said: Thanks for the info, but this is for a Klipsch Pro Slant Monitor Heresy. Don't know how I would add a port and don't really want one. I plan on having a horn sub built for her, so I am not really looking for low Bass out of these Heresy. Was more so hoping the K-42 would add more and better Mid Bass like the K-43 does over the K-33 for her LaScalas... Am I nuts in thinking / hoping for this Jim, anybody ??? Roger the specs of an EVM12L -80-7kHZ --an Eminence K42 - -52-4,5KHZ Quote Link to comment Share on other sites More sharing options...
twistedcrankcammer Posted April 30, 2020 Share Posted April 30, 2020 1 minute ago, 000 said: the specs of an EVM12L -80-7kHZ --an Eminence K42 - -52-4,5KHZ Doesn't make a difference. The LaScala plays down to about 50 Hz., but is not acting as a horn till about 100 Hz and above. I am planning on crossing over to the sub pretty high for this very reason Roger Quote Link to comment Share on other sites More sharing options...
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