raiders of the lost MW6600X

newbie308

I've posted in the wanted forum that I'm looking for a replacement driver for a SDA1 project, but to no avail. So, I thought I could look for a replacement driver still in a cabinet. The problem is, I don't know which speakers in the Polk lineup used the MW6600X. If someone has this information, can you please help. I only need one, and I will likely sell the other parts on CP!

Toolfan66

MW6600?? SDA 1?? From what I see the SDA 1 ( any model ) took a MW6600.

Toolfan66

Are you sure you have the right part number?? I can't find any SDA/Monitor taking a MW6600.

inspiredsports

If they are (1984) SDA 1's wouldn't the mid woofers be MW6501's ??

newbie308: Polk generally printed the WM model number and manufacture date on the back of the mid woofers. Have you removed a driver and taken a look?

Can you post front and back photos of the cabinets with the grilles off?

newbie308

I have one of the drivers in my hand, and on the back label is stamped MW6600X. These are the 1983 SDA1 Signature speakers. They have two SL1000 tweeters, four MW6600 drivers, and a passive sub woofer. Unfortunately a previous owner must have slipped with a screwdriver and punctured the surround on one driver. Since I'm trying to restore these, I'd like to replace the dammaged driver. I havn't been able to locate one, so I was hoping to find annother model of Polk speaker that was known to use this driver. I thought maybe I could dismantle annother set of speakers (early Monitors?) to get what I need for the SDA's!

Toolfan66

The parts list calls for MW6501's, 2 SL1000 tweeters and 4 MW6501's.

http://www.polkaudio.com/forums/showthread.php?t=55888



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geppy1

The 6600s were developed of the RTA 12B and used in early SDAs I had a pair of 1983 SDA1s and they had 6600s in them I even mentioned it to DK You have to be careful about going by Polks parts lists. For example they show all RTA12 and 12Bs with 6500s and 12Cs with 6600 and 6500 Yet every single 12B I have had has 6600s and MP response to a review of the 12B by Off the Record talks about the new 6600X driver being developed for the 12B. It is even mentiond in 1982 Lit. Point being he has the right drivers but the later ones could have come with 6501s. I prefer the 6600 in the 12s as i have compared them both but never did it in the SDA Keith




. RTA 12 6500s RTA 12Bs 6600 and early RTA 12Cs 6600s late Cs 6501s

Bobsama

newbie308 wrote: »

I have one of the drivers in my hand, and on the back label is stamped MW6600X. These are the 1983 SDA1 Signature speakers. They have two SL1000 tweeters, four MW6600 drivers, and a passive sub woofer. Unfortunately a previous owner must have slipped with a screwdriver and punctured the surround on one driver. Since I'm trying to restore these, I'd like to replace the dammaged driver. I havn't been able to locate one, so I was hoping to find annother model of Polk speaker that was known to use this driver. I thought maybe I could dismantle annother set of speakers (early Monitors?) to get what I need for the SDA's!

I've got an MW6600X over on a cabinet. I sold two MW6600X's here. I have another 4+ MW6600X's in my SDA-1's. They're definitely Polk though documentation of them is scarce.

Toolfan66

Now I'm in the know!!

inspiredsports

newbie308 wrote: »

I have one of the drivers in my hand, and on the back label is stamped MW6600X. These are the 1983 SDA1 Signature speakers. They have two SL1000 tweeters, four MW6600 drivers, and a passive sub woofer. Unfortunately a previous owner must have slipped with a screwdriver and punctured the surround on one driver. Since I'm trying to restore these, I'd like to replace the damaged driver. I haven't been able to locate one, so I was hoping to find another model of Polk speaker that was known to use this driver. I thought maybe I could dismantle another set of speakers (early Monitors?) to get what I need for the SDA's!

So when you mention "Signature", are these SDA 1's or SDA SRS 1's.

I thought Matt's signature was only placed on the SRS (Signature Reference Series), or were early 1's an exception?

gimpod

According to the literature on this form (Link check post #7) they are a Transitional Model that came out between the SDA 1 & SDA 1A.

inspiredsports

gim54pod wrote: »

According to the literature on this form (Link check post #7) they are a Transitional Model that came out between the SDA 1 & SDA 1A.

Looks like you hit the nail on the head! A non-SRS "Signature" model. I learn something new every day.

newbie308

inspiredsports wrote: »

So when you mention "Signature", are these SDA 1's or SDA SRS 1's.

I thought Matt's signature was only placed on the SRS (Signature Reference Series), or were early 1's an exception?

I say they are signature series since they have a brass badge below the tweeters that say "signature series" and have M. Polk's signature on them. I read a few old posts that discuss the SDA1 A having vents below the tweeters and this badge is where the ports would normaly be. However there are no ports drilled when I looked inside the cabinets. The other thing I read was how to convert a SDA1 A to SDA1 B by removing an inside horizontal baffle. That baffle is not in these cabinets.

newbie308

oops! my bad. I was working from a failing memory. The upgrade was from SDA1 to SDA1A. Sorry!

newbie308

Bobsama wrote: »

I've got an MW6600X over on a cabinet. I sold two MW6600X's here. I have another 4+ MW6600X's in my SDA-1's. They're definitely Polk though documentation of them is scarce.

Do you have any spares that you would be willing to sell?

Bobsama

newbie308 wrote: »

Do you have any spares that you would be willing to sell?

Sorry, no. I'm keeping this last spare for myself. They pop up on eBay every so often--that's where I got a trio of them.

newbie308 wrote: »

I say they are signature series since they have a brass badge below the tweeters that say "signature series" and have M. Polk's signature on them. I read a few old posts that discuss the SDA1 A having vents below the tweeters and this badge is where the ports would normaly be. However there are no ports drilled when I looked inside the cabinets. The other thing I read was how to convert a SDA1 A to SDA1 B by removing an inside horizontal baffle. That baffle is not in these cabinets.

Wrong. It was a SDA-1 to 1A conversion. Polk did some at the factory and others were sold by Polk as part of a DIY kit. You had to open the cabinet a bit more to fit SL2000 tweets and plug up the port holes. In addition, you had to remove a horizontal baffle (the vertical baffle was to be kept in). In addition, you had to further stuff the cabinet and modify the crossover and rewire the midwoofers.

Toolfan66

Funny how there is one on eBay now... Go get it MW6600X

http://cgi.ebay.com/Polk-Audio-SDA-1-Midrange-Woofer-Driver-/180554501504?pt=Speakers_Subwoofers&hash=item2a09e30d80

You think someone reads this fourm or just luck??

newbie308

I didn't get there in time Blast it! So I guess I'll be hovering on Ebay for the unforseen future until annother MW6600X pops up! Thanks for the heads up, but I was too late. Explative, curse, & some more explatives!!!

gimpod

newbie308 wrote: »

I didn't get there in time Blast it! So I guess I'll be hovering on Ebay for the unforseen future until annother MW6600X pops up! Thanks for the heads up, but I was too late. Explative, curse, & some more explatives!!!

What are you talking about? it's still there with 0 bids & 6 days to go.

newbie308

Weird! the last 2 times I tried to look it up, I got a message that said the listing was removed? I'll try again thanks!

gimpod

Your welcome dude, Hope you get it!

newbie308

O.K. Whew! I'm the first bid, and hopefully the last! One step closer to SDA heaven!

newbie308

It looks as though my 2 channel system is comming together nicely! My gear is neither new or high end, but it is what I can afford right now. I'm waiting for Sonicaps and Mills resistors for the SDA's crossovers, and I don't know if standard 14ga 300v tinned copper wire will be suitable for connecting the speakers to the crossovers. Once I have completed the rebuild of these speakers, I will be ready to plug it all in and throw the switch. Here is a list of what I have gathered so far:
SDA1 Signature speakers with upgraded crossovers
Adcom GFA1 amplifier (not sure if I'm going to use this)
Adcom GTP500 II preamp with tuner and remote (definitely going to use this)
Thorens TD280 MK II turntable (will do for now)
Carver TFM35 amplifier

Im open to suggestions for: interconnect cables, future turntables (and cartridges).