Need SDA Crossover help

gdphoto

Hello everyone! Recently my SDA1's started to sound as though they lost a little something. They still sound good, but to my ear that's been listening to them for 25 years, they seem as though they lost a little depth. I called Polk and they said it sounds like they need the crossovers rebuilt. Said the electrolytic caps go bad after 15 years or so. I am not a technician and the closest shop I found so far is 2 1/2 hours west of me from the Philadelphia area. Are there component parts I can remove and send to them? Is it something a novice can rebuild? Any help at all will be welcome.

Thank You!

mopar paul

It can be done by anyone with good soldering skills. There are some examples of rebuilds on this board. I would recommend going to the Vintage section and snooping around. Theres a lot to learn. If your not comfortable doing it I'm sure someone here would do it for a small fee.

thsmith

Here is a link to my crossover update.

http://www.polkaudio.com/forums/showthread.php?t=89067&highlight=crossover

hearingimpared

Welcome to Club Polk gdphoto. If you are not comfortable doing the crossovers yourself you should PM ben62670, he'll hook you up for a good price.

ben62670

Thanks Joe. I would be glad to help.
Ben

gdphoto

Hello Ben, If you would email me your phone number I would like to talk to you about replacing the caps on my SDA1 crossovers. <gdphoto@verizon.net>

Thanks for the tip Joe!

gdphoto

Thank you everyone for the quick response. I'll keep you posted.

gdphoto

I found a Polk Dealer in Chambersburg, PA which is about 2 1/5 hours from me. He says he can do the XO rebuild. With him I can also take both speakers to his shop and have the drivers checked out as well. He said he would call Polk to see whats needed. Any opinions on me going this route?

gdphoto

How do I tell if these SDA1's are a's, b's or c's? where would I find the schemats?

F1nut

He said he would call Polk to see whats needed.

Can't be a very good tech, all one has to do is look at the value markings on the crossover components.

Send them to Ben, he'll use better parts and do the job for less.

ben62670

First we need to identify your speakers. I shoot you my number. But please shoot some pics with the grills off and the rear where the cable plugs in.
Thanks much.
Ben

gdphoto

Thanks Ben, I'll do that tonight. This is all new to me so please bare with me. I was nervous about removing boards which are soldered to the speakers, but now after reading a bunch of posts, I believe I have SDA1C's. I'll also check that tonight. That would mean 1 board per cabinet with plugs...no soldering.

ben62670

A little side note. Try posting in the vintage posting area so you can pm later.
Ben

gdphoto

I sent the XO's to Ben to be rebuilt, can't wait to get them back up and running.

ben62670

I love doing these for Polkies! See them soon:) BTW post a new thread in the vintage section so you can PM;)

gdphoto

Here's a link to a few photos of my SDA1c's and the crossovers.

http://donnellyphotography.com/sda1c/

hearingimpared

gdphoto wrote: »

Here's a link to a few photos of my SDA1c's and the crossovers.

http://donnellyphotography.com/sda1c/

Wow those 1C crossover look way more ominous to redo than the 1.2 TLs.


Nice pics.

george daniel

Joe,, they are really pretty easy,,the first one is the most challenging, as in anything,, the largest hurdle for me was replacing the original caps with new-larger caps and leaving enough room for the tweeter and midrange connectors "snap connectors" to lock in,,lol.