Are my SDA's 1B's or C's??

wingzam
wingzam Posts: 201
edited January 2010 in Vintage Speakers
Well i've been lurking in the background for a while just enjoying the threads and posts but came across a post that got me confused so need some clarification.My SDA's were advertised as 1B's,the boxes (which are buried) I think only said SDA-1.
A member described his SDA-1's as the C version because they only have 1 pair of binding posts,whereas the B version has 2 pairs.Can anyone confirm this?I need to know because I plan on going thru the crossovers,etc..Also are the crossovers the same on these 2 versions?
Finally,i've run across a term I can't figure out - "TL modded" - what the heck does that mean??
Thanks!
Post edited by wingzam on
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Comments

  • george daniel
    george daniel Posts: 12,096
    edited January 2010
    Can you post a pic or describe the driver arrangement?
    JC approves....he told me so. (F-1 nut)
  • nooshinjohn
    nooshinjohn Posts: 25,464
    edited January 2010
    Pictures tell a thousand words... post up some pictures ot the front and the rear, especially showing the binding post/interconnect socket and that will help out a lot.
    The Gear... Carver "Statement" Mono-blocks, Mcintosh C2300 Arcam AVR20, Oppo UDP-203 4K Blu-ray player, Sony XBR70x850B 4k, Polk Audio Legend L800 with height modules, L400 Center Channel Polk audio AB800 "in-wall" surrounds. Marantz MM7025 stereo amp. Simaudio Moon 680d DSD

    “When once a Republic is corrupted, there is no possibility of remedying any of the growing evils but by removing the corruption and restoring its lost principles; every other correction is either useless or a new evil.”— Thomas Jefferson
  • heiney9
    heiney9 Posts: 25,217
    edited January 2010
    I don't know of any 1C's that use (2) sets of binding post from the factory. If any 1C would have it would have been the last production which were 1C's..........never seen one, read about one or sold one in the day.
    "Appreciation of audio is a completely subjective human experience. Measurements can provide a measure of insight, but are no substitute for human judgment. Why are we looking to reduce a subjective experience to objective criteria anyway? The subtleties of music and audio reproduction are for those who appreciate it. Differentiation by numbers is for those who do not".--Nelson Pass Pass Labs XA25 | EE Avant Pre | EE Mini Max Supreme DAC | MIT Shotgun S1 | Pangea AC14SE MKII | Legend L600 | BlueSound Node 3 - Tubes add soul!
  • ben62670
    ben62670 Posts: 15,969
    edited January 2010
    1B's are Blade/Blade SDA connectors. 1C's are Pin/Blade connectors. There may be a few transitional 1C's that are Blade/Blade with only the Top Blade being used for SDA. 1B's are 4ohms and 1C's are 6ohms.
    Please. Please contact me a ben62670 @ yahoo.com. Make sure to include who you are, and you are from Polk so I don't delete your email. Also I am now physically unable to work on any projects. If you need help let these guys know. There are many people who will help if you let them know where you are.
    Thanks
    Ben
  • wingzam
    wingzam Posts: 201
    edited January 2010
    Man you guys are fast!Thanks!The interconnect has a larger blade and a smaller blade - is this smaller blade considered a pin?There are two tweeters on top stacked length wise one above the other and centered in the middle of the cabinet,4 drivers and the radiator at bottom.It's easier to describe then trying to figure out how to post a picture on short notice.
  • ben62670
    ben62670 Posts: 15,969
    edited January 2010
    The pin is round. You most likely have 1B's.
    Please. Please contact me a ben62670 @ yahoo.com. Make sure to include who you are, and you are from Polk so I don't delete your email. Also I am now physically unable to work on any projects. If you need help let these guys know. There are many people who will help if you let them know where you are.
    Thanks
    Ben
  • george daniel
    george daniel Posts: 12,096
    edited January 2010
    JC approves....he told me so. (F-1 nut)
  • wingzam
    wingzam Posts: 201
    edited January 2010

    Yes,thats the same speakers,and with the "Silver Coil Dome" tweeters
  • wingzam
    wingzam Posts: 201
    edited January 2010
    Oh,looking at the second link,those speakers are sitting flat on the ground whereas mine have built on,what? pedestals about 2" tall.
  • Schurkey
    Schurkey Posts: 2,104
    edited January 2010
    Far as I know--and no doubt someone will set me straight...

    1Bs have vinyl woodgrain over chipboard; and they sit on short pedestals.

    1C have real wood laminate on top and bottom, no pedestal...except for the "Studio" 1C which looks just like a 1B except in black or black vinyl woodgrain instead of dark brown vinyl woodgrain like a 1B.

    The Studio 1C has the same drivers as the "real" 1C; and I suppose the same crossover as the 1C although I was reading that someone (I forget who) was saying there's two versions of the 1C crossover--a two-piece unit (early) and a 1-piece unit (later).

    And of course there are "transitional" versions, too. It does get complex.

    For me, the main issue would be the interconnect cable. Two blades = 1B; pin/blade = 1C.

    The pin/blade is beneficial because then you dont "HAVE" to use a common-ground amp; you have the option of bridged amps and/or monoblocks if you use a SPECIAL interconnect cable having a transformer in it.
  • hearingimpared
    hearingimpared Posts: 21,136
    edited January 2010
    Schurkey wrote: »
    Far as I know--and no doubt someone will set me straight...

    1Bs have vinyl woodgrain over chipboard; and they sit on short pedestals.

    1C have real wood laminate on top and bottom, no pedestal...except for the "Studio" 1C which looks just like a 1B except in black or black vinyl woodgrain instead of dark brown vinyl woodgrain like a 1B.

    The Studio 1C has the same drivers as the "real" 1C; and I suppose the same crossover as the 1C although I was reading that someone (I forget who) was saying there's two versions of the 1C crossover--a two-piece unit (early) and a 1-piece unit (later).

    And of course there are "transitional" versions, too. It does get complex.

    For me, the main issue would be the interconnect cable. Two blades = 1B; pin/blade = 1C.

    The pin/blade is beneficial because then you dont "HAVE" to use a common-ground amp; you have the option of bridged amps and/or monoblocks if you use a SPECIAL interconnect cable having a transformer in it.

    That's called an AI-1 cable.
  • wingzam
    wingzam Posts: 201
    edited January 2010
    Sounds like I have the B's,but am still wondering about the 1 pair of binding posts verses the 2 pair of binding posts configuration that I mentioned in the original post..
  • heiney9
    heiney9 Posts: 25,217
    edited January 2010
    Schurkey wrote: »
    Far as I know--and no doubt someone will set me straight...

    1Bs have vinyl woodgrain over chipboard; and they sit on short pedestals.

    1C have real wood laminate on top and bottom, no pedestal...except for the "Studio" 1C which looks just like a 1B except in black or black vinyl woodgrain instead of dark brown vinyl woodgrain like a 1B.

    The Studio 1C has the same drivers as the "real" 1C; and I suppose the same crossover as the 1C although I was reading that someone (I forget who) was saying there's two versions of the 1C crossover--a two-piece unit (early) and a 1-piece unit (later).

    And of course there are "transitional" versions, too. It does get complex.

    For me, the main issue would be the interconnect cable. Two blades = 1B; pin/blade = 1C.

    The pin/blade is beneficial because then you dont "HAVE" to use a common-ground amp; you have the option of bridged amps and/or monoblocks if you use a SPECIAL interconnect cable having a transformer in it.

    There are 2 versions of the x-over unit and according to the Stereo Review Magazine only the later single x-over board unit come in both studio and regular.

    The 1 piece x-over 1C's use different drivers (side wound voice coils similar to the SRS of the day) and are 6 ohm. The 2 piece X-over units use a slightly older drivers and are 4ohm. I believe many have said there are sonic differences but they tend to be subtle and the later (single board x-over's) are a little simpler and again according to Stereo Review are more coherent.

    Here's the review of the last production single x-over board 1C.

    http://www.polksda.com/sda1creview.shtml
    "Appreciation of audio is a completely subjective human experience. Measurements can provide a measure of insight, but are no substitute for human judgment. Why are we looking to reduce a subjective experience to objective criteria anyway? The subtleties of music and audio reproduction are for those who appreciate it. Differentiation by numbers is for those who do not".--Nelson Pass Pass Labs XA25 | EE Avant Pre | EE Mini Max Supreme DAC | MIT Shotgun S1 | Pangea AC14SE MKII | Legend L600 | BlueSound Node 3 - Tubes add soul!
  • heiney9
    heiney9 Posts: 25,217
    edited January 2010
    wingzam wrote: »
    Sounds like I have the B's,but am still wondering about the 1 pair of binding posts verses the 2 pair of binding posts configuration that I mentioned in the original post..

    There was no such thing from the factory.

    H9
    "Appreciation of audio is a completely subjective human experience. Measurements can provide a measure of insight, but are no substitute for human judgment. Why are we looking to reduce a subjective experience to objective criteria anyway? The subtleties of music and audio reproduction are for those who appreciate it. Differentiation by numbers is for those who do not".--Nelson Pass Pass Labs XA25 | EE Avant Pre | EE Mini Max Supreme DAC | MIT Shotgun S1 | Pangea AC14SE MKII | Legend L600 | BlueSound Node 3 - Tubes add soul!
  • wingzam
    wingzam Posts: 201
    edited January 2010
    OK heiny9 i'll pass that along and thank you all for the help!
  • george daniel
    george daniel Posts: 12,096
    edited January 2010
    now I'm thoroughly confused,,did we determine which model SDA's that you have?:):confused:
    JC approves....he told me so. (F-1 nut)
  • wingzam
    wingzam Posts: 201
    edited January 2010
    now I'm thoroughly confused,,did we determine which model SDA's that you have?:):confused:

    Haha!!Ya Daniel i'd say it's unanimous that they're the SDA-1B's.All this confusion began with a post by a member (who will remain nameless) that made the comment that the B's had 2 pair of binding posts and the C's had one pair...well,reading down the thread nobody made a correction so i'm all excited thinking i've got C's,but wanted to double check before I started going thru them.
    A little disappointment a day makes the heart grow fonder..or something like that..but hey - i've got a nice pair of 1B's and that doesn't suck!
  • ben62670
    ben62670 Posts: 15,969
    edited January 2010
    Nobody said that either had 2 sets of binding posts. H9 staed the B's had a two piece XO. IE two boards.
    Please. Please contact me a ben62670 @ yahoo.com. Make sure to include who you are, and you are from Polk so I don't delete your email. Also I am now physically unable to work on any projects. If you need help let these guys know. There are many people who will help if you let them know where you are.
    Thanks
    Ben
  • wayne3burk
    wayne3burk Posts: 939
    edited January 2010
    well for what it's worth i have the black studio 1C's one pair of binding posts and 6ohm's rated impedance...

    for that it's worth
    Yamaha RX-V2700, EMI 711As (front), RCA K-16 (rear), Magnavox Console (Center & TV Stand), Sony SMP-N200 media streamer, Dual 1249 TT =--- Sharp Aquas 60" LCD tellie
  • heiney9
    heiney9 Posts: 25,217
    edited January 2010
    now I'm thoroughly confused,,did we determine which model SDA's that you have?:):confused:

    Probably need pics to determine for sure
    ben62670 wrote: »
    Nobody said that either had 2 sets of binding posts. H9 staed the B's had a two piece XO. IE two boards.

    The OP did see below my highlight
    wingzam wrote: »
    Well i've been lurking in the background for a while just enjoying the threads and posts but came across a post that got me confused so need some clarification.My SDA's were advertised as 1B's,the boxes (which are buried) I think only said SDA-1.
    A member described his SDA-1's as the C version because they only have 1 pair of binding posts,whereas the B version has 2 pairs.Can anyone confirm this?I need to know because I plan on going thru the crossovers,etc..Also are the crossovers the same on these 2 versions?
    Finally,i've run across a term I can't figure out - "TL modded" - what the heck does that mean??
    Thanks!

    H9
    "Appreciation of audio is a completely subjective human experience. Measurements can provide a measure of insight, but are no substitute for human judgment. Why are we looking to reduce a subjective experience to objective criteria anyway? The subtleties of music and audio reproduction are for those who appreciate it. Differentiation by numbers is for those who do not".--Nelson Pass Pass Labs XA25 | EE Avant Pre | EE Mini Max Supreme DAC | MIT Shotgun S1 | Pangea AC14SE MKII | Legend L600 | BlueSound Node 3 - Tubes add soul!
  • wingzam
    wingzam Posts: 201
    edited January 2010
    ben62670 wrote: »
    Nobody said that either had 2 sets of binding posts. H9 staed the B's had a two piece XO. IE two boards.
    Ben the following info was sent to me which along with the original post,led to my confusion:

    John,
    The reason I put the caveat into my statement is that I am not an SDA guru. The information I stated was pulled from my understanding of the orignal manuals that came with the speakers. Basically, the first manual was for the SDA 1B which showed the dual binding posts. There was an addendum manual with updates for the 1C's which shows the single binding posts. Either way, they are both SDA-1s and my manuals didn't say SDA 1-C on the front. They cover several SDA 1 series speakers. I don't know of any other identifiers for the 1C's. Not sure what TL modded means but it might have something to do with the tweeters having been replaced. That's a good question for the SDA experts on the forum.
  • F1nut
    F1nut Posts: 50,753
    edited January 2010
    Basically, the first manual was for the SDA 1B which showed the dual binding posts.

    Nope, never happened.
    Political Correctness'.........defined

    "A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."


    President of Club Polk

  • wingzam
    wingzam Posts: 201
    edited January 2010
    F1nut wrote: »
    Nope, never happened.

    Um uh er uh well um uh duh oh well damn....
  • ben62670
    ben62670 Posts: 15,969
    edited January 2010
    I consider myself well versed in SDA's, but F1nut knows more than nearly anyone hear when it comes to SDA's;)
    Please. Please contact me a ben62670 @ yahoo.com. Make sure to include who you are, and you are from Polk so I don't delete your email. Also I am now physically unable to work on any projects. If you need help let these guys know. There are many people who will help if you let them know where you are.
    Thanks
    Ben
  • ben62670
    ben62670 Posts: 15,969
    edited January 2010
    Got me:D
    Please. Please contact me a ben62670 @ yahoo.com. Make sure to include who you are, and you are from Polk so I don't delete your email. Also I am now physically unable to work on any projects. If you need help let these guys know. There are many people who will help if you let them know where you are.
    Thanks
    Ben
  • wingzam
    wingzam Posts: 201
    edited January 2010
    Mine are happy - they've finally discovered their true inner selves!
  • ben62670
    ben62670 Posts: 15,969
    edited January 2010
    Glad to hear you are enjoying them:)
    Please. Please contact me a ben62670 @ yahoo.com. Make sure to include who you are, and you are from Polk so I don't delete your email. Also I am now physically unable to work on any projects. If you need help let these guys know. There are many people who will help if you let them know where you are.
    Thanks
    Ben
  • wingzam
    wingzam Posts: 201
    edited January 2010
    Now can someone tell me what "TL modded" means????
  • ben62670
    ben62670 Posts: 15,969
    edited January 2010
    The TL mod refers to modding the XO to use the 198 replacements instead of the 194 replacements. Stick with the 194's and drop them in. Also consider strongly upgrading the crossovers.
    Ben
    Please. Please contact me a ben62670 @ yahoo.com. Make sure to include who you are, and you are from Polk so I don't delete your email. Also I am now physically unable to work on any projects. If you need help let these guys know. There are many people who will help if you let them know where you are.
    Thanks
    Ben
  • wingzam
    wingzam Posts: 201
    edited January 2010
    Aaaahhhhh,now all my questions are answered!!
    But wait a minute,since i've got the Gurus on the line - what is the meaning of life??