Deano1974 Posted September 30, 2018 Share Posted September 30, 2018 Hey guys a quick question is there any benefit from removing the phase plug on La Scala II's tweeter Has anyone done this? Sent from my LG-H990 using Tapatalk Quote Link to comment Share on other sites More sharing options...
pbphoto Posted September 30, 2018 Share Posted September 30, 2018 No and no. What don't you like about it? 1 Quote Link to comment Share on other sites More sharing options...
Deano1974 Posted September 30, 2018 Author Share Posted September 30, 2018 It's fine, I have just seen people upgrade their horn mouths and these dont have the phase plugSo was Just wondering if it was essential or just protection for the diaphragmIm just curious thats all [emoji6]Sent from my LG-H990 using Tapatalk Quote Link to comment Share on other sites More sharing options...
Don Richard Posted September 30, 2018 Share Posted September 30, 2018 The phase plug is necessary for accurate high frequency response, otherwise you get phase cancellation. Some HF horns appear to not have phase plugs because those horns use detachable compression drivers which have their own phase plugs. 2 Quote Link to comment Share on other sites More sharing options...
boom3 Posted September 30, 2018 Share Posted September 30, 2018 What Don said! The phase plug is not decorative. Without it, phase cancellation will produce a deep dip in response at some frequency. The K77/T35 series of tweeters used a two-piece "Avedon" phase plug which was a marvel for the late 50s but has been superseded by better designs now. EV Avedon T35.pdf 2 Quote Link to comment Share on other sites More sharing options...
Deano1974 Posted September 30, 2018 Author Share Posted September 30, 2018 Thanks guys.. just curious [emoji6]Sent from my LG-H990 using Tapatalk Quote Link to comment Share on other sites More sharing options...
moray james Posted September 30, 2018 Share Posted September 30, 2018 There are replacement drop in tweeters to upgrade from the K77 you can take a look at bob Crites's site and check them out even the least expensive CT125 is a significant improvement it drops right in and he has better options as well for a little more. Best Klipsch parts help on earth a superb individual to deal with. https://critesspeakers.com/klipsch_tweeters.html Quote Link to comment Share on other sites More sharing options...
Schu Posted September 30, 2018 Share Posted September 30, 2018 I am wondering how much of this: Is do to the change in lens profile? Quote Link to comment Share on other sites More sharing options...
derrickdj1 Posted September 30, 2018 Share Posted September 30, 2018 They did not throw it in there just because there were extra's laying around. Mods can be good but, 98% of the time it is hard to out do the acoustic engineers for most of us. Quote Link to comment Share on other sites More sharing options...
pzannucci Posted October 2, 2018 Share Posted October 2, 2018 On 9/30/2018 at 5:19 AM, Deano1974 said: It's fine, I have just seen people upgrade their horn mouths and these dont have the phase plug So was Just wondering if it was essential or just protection for the diaphragm Im just curious thats all Sent from my LG-H990 using Tapatalk The upgrades already have phase plugs in them, hidden typically behind a screen. The K77 just has one that is integrated in the horn. Without them there is high frequency cancellation. 1 Quote Link to comment Share on other sites More sharing options...
JohnA Posted October 3, 2018 Share Posted October 3, 2018 Phase plugs http://education.lenardaudio.com/en/07_horns_2.html Quote Link to comment Share on other sites More sharing options...
Deano1974 Posted October 3, 2018 Author Share Posted October 3, 2018 Ok so how does DaveA horn lens as below replace the LSII's horn lens as below when the phase plug is part of the horn lens itself unless what i think is the phase plug in fact is notSo in photo below the black diaphram in the center of the horn lens, is that the phase plug?Sent from my LG-H990 using Tapatalk Quote Link to comment Share on other sites More sharing options...
Dave A Posted October 3, 2018 Share Posted October 3, 2018 The K-77 is designed to work only with that driver/lens combination. Drivers like the DE10,110 120 and APT50 incorporate phase plugs internally and independent of the horn lens because they are meant to be used with differing horn lenses. From B&C " Standard features in our compression drivers include copper shorting rings, FEA optimized phase plugs, and edge-wound copper-clad aluminum voice coil wire. " Quote Link to comment Share on other sites More sharing options...
Deano1974 Posted October 3, 2018 Author Share Posted October 3, 2018 Ok thanks Dave so technically yours wouldnt work if i understand correctly?Sent from my LG-H990 using Tapatalk Quote Link to comment Share on other sites More sharing options...
Dave A Posted October 3, 2018 Share Posted October 3, 2018 Wouldn't work for what? I don't understand your comment. Quote Link to comment Share on other sites More sharing options...
Deano1974 Posted October 3, 2018 Author Share Posted October 3, 2018 Sorry im new to lens and drivers etc, So if the la scala II has the phase plug moulded into the horn lens of the tweeter as in the photo i posted before and your lens does not, then how would the phase plug be incorporatedOr does your lens not require the phase plugSorry for the stupid questions Wouldn't work for what? I don't understand your comment.Sent from my LG-H990 using Tapatalk Quote Link to comment Share on other sites More sharing options...
Dave A Posted October 3, 2018 Share Posted October 3, 2018 If you read the quote from B&C they tell you that phase plugs are there in all those drivers. They are meant to be used in different horns so the phase plug has to be an integral part of the driver and not the horn. This thing Klipsch has made can only work with itself so they could put the phase plug on the horn lens or the driver and chose to put it on the horn lens. This K-77 is the strange one here compared to most drivers on the market so don't get hung up on the idea that this K-77 is the only way or the best way because most drivers are not made like this. Quote Link to comment Share on other sites More sharing options...
Don Richard Posted October 3, 2018 Share Posted October 3, 2018 4 hours ago, Deano1974 said: Ok so how does DaveA horn lens as below replace the LSII's horn lens as below when the phase plug is part of the horn lens itself unless what i think is the phase plug in fact is not On 9/30/2018 at 6:38 AM, Don Richard said: Some HF horns appear to not have phase plugs because those horns use detachable compression drivers which have their own phase plugs. Quote Link to comment Share on other sites More sharing options...
pzannucci Posted October 3, 2018 Share Posted October 3, 2018 1 hour ago, Deano1974 said: Sorry im new to lens and drivers etc, So if the la scala II has the phase plug moulded into the horn lens of the tweeter as in the photo i posted before and your lens does not, then how would the phase plug be incorporated Or does your lens not require the phase plug Sorry for the stupid questions Sent from my LG-H990 using Tapatalk Refer to this thread: Quote Link to comment Share on other sites More sharing options...
Deano1974 Posted October 3, 2018 Author Share Posted October 3, 2018 If you read the quote from B&C they tell you that phase plugs are there in all those drivers. They are meant to be used in different horns so the phase plug has to be an integral part of the driver and not the horn. This thing Klipsch has made can only work with itself so they could put the phase plug on the horn lens or the driver and chose to put it on the horn lens. This K-77 is the strange one here compared to most drivers on the market so don't get hung up on the idea that this K-77 is the only way or the best way because most drivers are not made like this. Understood thank you Sent from my LG-H990 using Tapatalk Quote Link to comment Share on other sites More sharing options...
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