How do I tell if i have SDA 1C's ?

bobt

I bought these around the later 80's, not sure when. There is nothing I can find on the back that has "C" on it. Is it only the speaker layout that defines the "c" model. Mine look exactly like what is on ebay saying it's a C model.
It has the tweeters sitting vertical in the middle of the cab.
I believe it IS the 1C, but funny theres no markings on them that say that.

Schurkey

There was a pair of 1C for sale recently; they looked exactly like my 1B.

I e-mailed the seller; he claimed his invoice specifically said they were 1C.

He also wouldn't answer whether they used a blade/pin or blade/blade interconnect cable.

The "true" 1Cs have a (narrow) wood board at the top and at the bottom; everything else on the front is fabric.

The 1B has the grille all the way to the top; and a small wood-looking veneer pedestal below the grille.

Apparently--and I don't know this for a fact, but it seems to be supported in the Schematics thread about "interim models" that the very early 1C were built into 1B cabinets.

Pull a midrange driver: If it's an xx09 you have 1B. If it's xx10 or xx11 you have 1C.

SOMEWHERE there's a chart of the drivers and crossovers used in the various Polk speakers. I can't find it now; I don't remember where I saw it.

Ricardo

Here's a link to the parts lists.

http://clubpolk.polkaudio.com/service/models/

I think the 1C's had a "studio" model that had the same cabinet as the 1B's.

In any case, if yours have the wood (veneer) caps and bottom, they are 1C's. I don't think any of the speakers had the letters (B or C) in the stickers in the back.

bobt

Thanks guys....It is a "studio" model..1C....basically a black model of the 1C.
I guess it was a cheaper model, then the one that had cherry wood tops to it...LOL

madmax

Nothing wrong with the Studio model. I had a pair and they sounded exactly the same as the 1C's.
madmax

bobt

Well thanks Lasareath.....there is no difference between the models..except for the fact of a cherry top.
But I will never sell them anyway...LOL
the bottom part of these speaker are kind of done in.....that Stand if you will...the 4 pieces of, wood or whatever they put there...are kind of done in.
I think I'm just going to take all that off...and put some Vtype stands on them.

Marty913

Schurkey wrote: »

There was a pair of 1C for sale recently; they looked exactly like my 1B.

I e-mailed the seller; he claimed his invoice specifically said they were 1C.

He also wouldn't answer whether they used a blade/pin or blade/blade interconnect cable.

The "true" 1Cs have a (narrow) wood board at the top and at the bottom; everything else on the front is fabric.

The 1B has the grille all the way to the top; and a small wood-looking veneer pedestal below the grille.

Apparently--and I don't know this for a fact, but it seems to be supported in the Schematics thread about "interim models" that the very early 1C were built into 1B cabinets.

Pull a midrange driver: If it's an xx09 you have 1B. If it's xx10 or xx11 you have 1C.

SOMEWHERE there's a chart of the drivers and crossovers used in the various Polk speakers. I can't find it now; I don't remember where I saw it.

I bought a pair of 1C's last week and picked them up yesterday. They are Studio versions (black) which I believe was not available in the 1B. They came with two manuals, one for the SDA 1B and another "Addendum" referencing the 2B and 1C models.

The 1C cabinets look almost identical to the 1B with a small pedestal underneath, a 5" wood "slat" above that, then grill all the way to the top. They have a pin/blade connector.

According to the manual the cabinet dimensions are different. The 1B is 12D X 16W X 43.5H. The 1C is 11.5D X 16.5W X 44H. The Studio version is different still (11.75D, 15.875W, 43H).

As mentioned, the 4 mid-drivers in the 1B are 6509's, in the 1C they are 6510(2) and 6511(2).

If I recall, the standard 1C was $799 per speaker, the Studio's were $699. As mentioned though, the Studio's don't seem to appear for sale very much. Maybe there were just fewer sold.

I-SIG

The great thing about the Studio's is that one man can reasonably move them by himself.

Wes

bobt

To be honest...I don't see how haveing a cherry top or the black(studio) models would make a difference..I can kind of move them...with side to side thing..but to pick them up...I need my son..he's 30' works out...and the only one that can just pick them up and move them....he can just grab hold..pick up the speaker and move it...but not for a long distance....LOL

StevieB

I just found some what I thought were black 1B's sitting in the corner of a pawn shop for 200 dollars. I've had 2B's since 1989 and always wanted to own some 1's. Got them home and pulled one of the drivers out...1C's!!

I-SIG

bobt wrote: »

To be honest...I don't see how haveing a cherry top or the black(studio) models would make a difference..I can kind of move them...with side to side thing..but to pick them up...I need my son..he's 30' works out...and the only one that can just pick them up and move them....he can just grab hold..pick up the speaker and move it...but not for a long distance....LOL

I think there is a 15-20lb difference. 60lbs vs 80lbs is a pretty good size threshold to cross. I know I never had trouble toting the Studio's I used to own, but they were at the absolute limit of "toting."

Wes

Schurkey

Marty913 wrote: »

The 1C cabinets look almost identical to the 1B with a small pedestal underneath, a 5" wood "slat" above that, then grill all the way to the top. They have a pin/blade connector.

According to the manual the cabinet dimensions are different. The 1B is 12D X 16W X 43.5H. The 1C is 11.5D X 16.5W X 44H. The Studio version is different still (11.75D, 15.875W, 43H).

THIS is what I think of when I'm picturing a 1C. Board on top, Board on the bottom, NO "pedestal".
(Thanks, DarqueKnight)


THESE are supposed to be the "Studio" version of the 1C
http://www.polksda.com/sda1c-studio.shtml


THESE are like my 1B: (thanks again, DarqueKnight)

http://www.polkaudio.com/forums/showthread.php?t=7668

If there's a printed difference in the cabinet dimensions between the 1C-Studio and the 1B; I bet it's because somebody rounded off the measurements; my guess it that they're the same cabinet with different vinyl veneer (or NO veneer on the Studios--haven't seen one in person, and it's hard to tell from the photos.)

Ricardo--Thanks for re-connecting me with that link to the speaker parts chart!

heiney9

bobt wrote: »

To be honest...I don't see how haveing a cherry top or the black(studio) models would make a difference..I can kind of move them...with side to side thing..but to pick them up...I need my son..he's 30' works out...and the only one that can just pick them up and move them....he can just grab hold..pick up the speaker and move it...but not for a long distance....LOL

The cabinet structure on the reg. 1C's is slightly better. More internal bracing and more mass = a little better bass response and less cabinet resonance. For all intents and purposes it would be hard to hear a difference.

The "Studio" version was lighter and cost $200 less per speaker and used veneer rather than wood. These were introduced to make buying a pair of SDA's a little more affordable, I believe.

Studio versions are not that rare but usually the reg. version is what you see FS more times than not.

H9