Cross over for an SDA-2

kkd

I need a complete crossover network for an SDA 2. I bought a nice pair of SDA 2's from a friend and the only issue is one missing woofer and one of the crossovers is missing!
He has had these since new and cannot seem to explain why parts are missing.
I would really love to get these SDA's going, so please let me know if you have an extra crossover that you will part with, know of one for sale somewhere, or have a lead on one.

Thanks

ben62670

First welcome to Club Polk, and second could you post a pic of the XO, and speaker. I am sure someone can help you.
Ben

zingo

Have you checked ebay? I feel that there is often people parting there's out on there.

danger boy

kkd, good possibility you'll have to build one yourself or have someone build one for you.. but you never know. one may show up on Ebay.. but that could be quite a wait too.

if you end up having to build one.. rebuild the good one too. so they match soundwise.

kkd

I have tried Ebay. Nothing yet.

I will try to post pics of the crossover tomorrow.

danger boy

kkd, please also post a picture of the front of the speakers with the grill off.. that way we know which model of SDA 2 you are talking about.

kkd

The label on the back of each speaker just says SDA 2 Right and Left. There is no 2A, 2B, etc.

kkd

Here is the crossover that I need

F1nut

That's the SDA 2B and if the first crossover pic wasn't so blurry, I'd bet I could read 2B/BE1807-B on that little white sticker.

You are going to have to build one or keep looking on eBay. Tip, it's the same crossover used in the pin/blade version of the CRS+ speaker.

BTW, could you remove the tags as they serve no purpose being that this is a wanted ad.

dcmeigs

Welcome to the forum,

Those are SDA-2Bs. You might find a sticker on the crossover (or perhaps in the bottom of the cabinet if it fell off) that says: SDA-2B/CRS+.

Watch for a crossover from an SDA-CRS+ too, because that speaker uses the same crossovers.

If you want to do this on the cheap, I can send you the caps and resistors and you can build one with parts that are identical to the pictured crossover. I have them laying around from previous upgrades. Of course, you will still need to buy inductors.

The much better solution is to search the threads and find some very detailed accounts of upgrading to metalized polyproplyene caps and non-inductive resistors. The improvement is worth the time and expense.

ben62670

Do you have the other large coil that the XO board is connected to?

kkd

The other crossover is missing completely. Nothing left

danger boy

some good advice... you may find one for the 2B or the CRS+ would also work as mentioned.

good luck.

ben62670

If you can come up with a 16mh coil I would be able to help. Did you check with Polk for an XO?
Ben

kkd

I called Polk and the nice Customer Service Rep directed me to this site. Accordong to he, there are no SDA X'overs available from Polk.

He said that the schematic for the cross over is available from this site, perhaps I can build it myself.

I don't know about that....

Face

17mh
http://www.partsexpress.com/pe/pshowdetl.cfm?&Partnumber=266-956
1.3mh
http://www.partsexpress.com/pe/pshowdetl.cfm?&Partnumber=266-830
2.5mh
http://www.partsexpress.com/pe/pshowdetl.cfm?&Partnumber=266-836
.4mh
http://www.partsexpress.com/pe/pshowdetl.cfm?&Partnumber=266-814
12uf
http://www.partsexpress.com/pe/pshowdetl.cfm?&PartNumber=027-246
20uf
http://www.partsexpress.com/pe/pshowdetl.cfm?&PartNumber=027-436
40uf
http://www.partsexpress.com/pe/pshowdetl.cfm?&PartNumber=027-442
2.7ohm resistor is available from Sonic Craft
http://soniccraft.com/mills_resistors.htm

kkd

Ben,
I will give you a call tomorrow (thursday)!