Tarheel TJ Posted July 19, 2011 Share Posted July 19, 2011 I was checking the crossovers from my new La Scalas that I bought off of craigslist and I had a few questions that I thought some of you might be able to answer for me. First, what is the item circled in red in this first picture. It is on the schematic, so I assume it is suposed to be there, but I just don't recognize it. http://tarheeltj.shutterfly.com/pictures/11 Second, I discovered a 7.5 ohm resistor wired across the tweeter leads. This is not on the schematic, so I am assuming it was added by the previous owner. The PO had removed the k77s and replaced them with piezo tweeters (the horror!). I'm guessing he added this resistor when he did that "mod." I have a pair of Crites tweeters that I want to use with these speakers, so I'm guessing I need to remove this resistor, correct? http://tarheeltj.shutterfly.com/pictures/11#9 Third, are there any recomended mods for these crossovers? I plan on re-capping them in the near future, and I've also thought of trying the 4500hz mod, since I will have the Crites tweeters in place. Anything else I should take care of while I am working on them? http://tarheeltj.shutterfly.com/pictures/11#10 Thanks, everybody! Quote Link to comment Share on other sites More sharing options...
Tarheel TJ Posted July 19, 2011 Author Share Posted July 19, 2011 2nd pic: Quote Link to comment Share on other sites More sharing options...
Tarheel TJ Posted July 19, 2011 Author Share Posted July 19, 2011 3rd pic, for reference: Quote Link to comment Share on other sites More sharing options...
djk Posted July 19, 2011 Share Posted July 19, 2011 The 100Ω resistor is in parallel with the Polyswitch tweeter protection device. When the Polyswitch opens during protection, the resistor loads the network so it doesn't resonate and burn up. Quote Link to comment Share on other sites More sharing options...
John Warren Posted July 19, 2011 Share Posted July 19, 2011 Here's a pic of a factory pair, no alterations, no revisions. etc. Quote Link to comment Share on other sites More sharing options...
Tarheel TJ Posted July 20, 2011 Author Share Posted July 20, 2011 Well I think that answers my questions. The thing that I didn't recognize is a tweeter protection circuit, and the 7.5 ohm resistor is not stock. Thank you very much, gentlemen. Does this tweeter protection circuit have any effect on sound quality? Has anyone ever removed it to see what it would sound like? Quote Link to comment Share on other sites More sharing options...
.thumb.jpg.1fb40d11b1cb3cc11ef3b2f0f7c8fe89.jpg)
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.