Picked up a mint pair of SDA CRS +'s...I'd like to bring them back to their former glory, or better.

Options
1246

Comments

  • audioluvr
    audioluvr Posts: 6,079
    Options
    91rtstealth wrote: »
    alright...interesting turn of events...

    so this guy on Facebook has the following...he said I could have any of it for almost nothing...just shipping and a minimal fee...

    bw4qp7t6b0v9.jpg

    Those are the droids you are looking for.
    Gustard X26 Pro DAC
    Belles 21A Pre Upgraded with Mundorf Supremes
    B&K M200 Sonata monoblocks refreshed and upgraded
    Polk SDA 1C's modded / 1000Va Dreadnaught
    Wireworld Silver Eclipse IC's and speaker cables
    Harman Kardon T65C w/Grado Gold. (Don't laugh. It sounds great!)

    There is about a 5% genetic difference between apes and men …but that difference is the difference between throwing your own poo when you are annoyed …and Einstein, Shakespeare and Miss January. by Dr. Sardonicus
    · Share on Facebook
  • audioluvr
    audioluvr Posts: 6,079
    Options
    Also see if the guy can glue the magnets for you so they don't arrive shifted or at the very least pack them extremely well (no bubble wrap). I use old paper bags crumpled up.
    Gustard X26 Pro DAC
    Belles 21A Pre Upgraded with Mundorf Supremes
    B&K M200 Sonata monoblocks refreshed and upgraded
    Polk SDA 1C's modded / 1000Va Dreadnaught
    Wireworld Silver Eclipse IC's and speaker cables
    Harman Kardon T65C w/Grado Gold. (Don't laugh. It sounds great!)

    There is about a 5% genetic difference between apes and men …but that difference is the difference between throwing your own poo when you are annoyed …and Einstein, Shakespeare and Miss January. by Dr. Sardonicus
    · Share on Facebook
  • 91rtstealth
    91rtstealth Posts: 125
    Options
    Ahhh man. Bad news.

    The guy was mistaken. He sold the 6511’s and it’s the 6510’s that he has in storage. He just went to his storage unit and verified that he has 6510’s, NOT 6511’s. :(.

    I think I’m still going to take the crossovers and just run my 6510’s for now and see what it sounds like. I can’t imagine it’s going to be a HUGE difference. If so, I’ll try to get some 6511’s down the line.

    What do yall think?
    · Share on Facebook
  • aprazer402
    aprazer402 Posts: 3,463
    edited February 4
    Options
    Not trying to confuse you even more, I also have the CRS+ 1986 blade/blade version w/stands.

    I bookmarked the following thread of Neil's 4.1TL conversion of his 1989 CRS+ PIN/blade.
    https://forum.polkaudio.com/discussion/137026/my-new-4-1tl-039-s-are-complete/p1

    Lots of great info. on it.

    I also have a pair of SDA 2A's blade/blade, with the same crossover as our 1986 CRS+.

    The cost to even recap these with two boards in each is a lot. Which is why I haven't considered it.
    I need to practice recapping on a smaller Polk, maybe a 7B, first to get it down better. It's been years.

    I'm thinking, when I get my 14' x 12' main floor den room ready, the CRS's might work well in there.
    I may just put new tweeters in them and see how that sounds.

    Great people here, get your learn on!

    Good luck and welcome to the forum!

    Edit: Sorry, I thought you were new here for some reason. ;)

    · Share on Facebook
  • xschop
    xschop Posts: 5,821
    Options
    You can substitute the 6511’s with 6502’s. The trade off is a little less bass output, but better midrange. I’ve done it a few times myself.
    Don't take experimental gene therapies from known eugenicists.
    · Share on Facebook
  • 91rtstealth
    91rtstealth Posts: 125
    edited February 4
    Options
    ok cool..i'm gonna get those crossovers from him and just run my 6510's for a while...i'll keep my eyes open for the correct 6511's...or the 6502's...

    anyone know anything about this "replacement" for the 6511?

    https://reconingspeakers.com/product/6-5-woofer-with-butyl-surround-4-ohm-6024/
    · Share on Facebook
  • xschop
    xschop Posts: 5,821
    edited February 4
    Options
    I'd refrain. They have a 1.5" dia VC, and that dust cap is hideous.

    Contact @F1nut for some spare 6502's
    Don't take experimental gene therapies from known eugenicists.
    · Share on Facebook
  • Conradicles
    Conradicles Posts: 6,432
    Options
    I may have something, I'll check...
    · Share on Facebook
  • 91rtstealth
    91rtstealth Posts: 125
    Options
    Conradicles wrote: »
    I may have something, I'll check...

    sweet..thanks..

    also, Nice Z....I love those...not to work on, but everything else about them is great..haha..
    · Share on Facebook
  • 91rtstealth
    91rtstealth Posts: 125
    Options
    crossovers are in the mail..should arrive later this week....

    what are ya'll's thoughts on these? is installing a phase plug in these a popular mod? i've never seen this, ever..

    https://ebay.com/itm/116818072269?chn=ps&mkevt=1&mkcid=28&google_free_listing_action=view_item
    · Share on Facebook
  • plastic_avatar
    plastic_avatar Posts: 747
    Options
    You just activated the Shatstorm Response Network.

    [grabs galoshes and raincoat]

    [stares at horizon from under the brim of a giant, whale-blubber-treated sailor's hat]
    The Thrifty Setups in Mah House Big thrifty stereo in the basement w/ my custom SDA-1C (built with help from kind forum members) * Beautiful 1966 MCM GE console upgraded w/ Bluetooth, Dual turntable, and Paradigm speakers in family room * Swanky 1980 Realistic system and great TEAC eq with dancing colored lights in the living room * custom 5B on a system for my Dad * Ye Olde college stereo in the garage
    · Share on Facebook
  • plastic_avatar
    plastic_avatar Posts: 747
    edited February 8
    Options
    I do like mine...

    ocp64l9pccvx.jpeg
    The Thrifty Setups in Mah House Big thrifty stereo in the basement w/ my custom SDA-1C (built with help from kind forum members) * Beautiful 1966 MCM GE console upgraded w/ Bluetooth, Dual turntable, and Paradigm speakers in family room * Swanky 1980 Realistic system and great TEAC eq with dancing colored lights in the living room * custom 5B on a system for my Dad * Ye Olde college stereo in the garage
    · Share on Facebook
  • 91rtstealth
    91rtstealth Posts: 125
    Options
    plastic_avatar wrote: »
    You just activated the Shatstorm Response Network.

    [grabs galoshes and raincoat]

    [stares at horizon from under the brim of a giant, whale-blubber-treated sailor's hat]

    Looks cool, and generally phase plugs can be pretty helpful...

    is this something you did yourself, or is there someone specific out there online that makes them? I"m just curious since I never saw them before.
    · Share on Facebook
  • plastic_avatar
    plastic_avatar Posts: 747
    Options
    Mine are @xschop beauties.

    The ones in the picture are from my 1C. I wanted to see how the sounded in the stereo slots of the CRS+.

    There's a bit of a hubbub because the people using them in stereo models have, to the best of my knowledge, loved them, but! Only 2 of us, to the best of my knowledge, tried them on SDA models; I liked them in my 1C, but Polk legend DarqueKnight did not like them in his CRS+.

    I'm up to mod any and all of these old Polks. I enjoy it. I've lucked out on my mods, so far, but am always prepared for failure.

    As some have said elsewhere, these parts are getting hard(er) to find. If you mod your own, be sure you want to do it =)

    If you're buying the mids already modded (to replace what's busted on yours, for a good price), go for it. I will say, I'm glad I have a set of modded and unmodded mids that fit both the 1C and the CRS+. I can compare how they sound. I'm still testing the arrangement to see what combo of plugged/unplugged I have in the 1C, but I do know at the very least) me-and-mine prefer the plugged mids on the stereo side.
    The Thrifty Setups in Mah House Big thrifty stereo in the basement w/ my custom SDA-1C (built with help from kind forum members) * Beautiful 1966 MCM GE console upgraded w/ Bluetooth, Dual turntable, and Paradigm speakers in family room * Swanky 1980 Realistic system and great TEAC eq with dancing colored lights in the living room * custom 5B on a system for my Dad * Ye Olde college stereo in the garage
    · Share on Facebook
  • 91rtstealth
    91rtstealth Posts: 125
    Options
    cool..well thanks for the info. I didn't even know that was a thing people did to these speakers.

    I think for now I'm just going to run the 6510's that are currently in my CRS+'s, and keep my eyes out for some stock 6511's so I can A and B them with the 6510's to see what kind of differences I notice. First I need to get these crossovers, rdo198's, caps, and resistors get this project underway. If I find some 6511's at some point..cool..if not, i'll live.
    · Share on Facebook
  • xschop
    xschop Posts: 5,821
    Options
    If that ebay ad was Ray Smith's 6511, then it is junk because the suspension is fubar.
    Don't take experimental gene therapies from known eugenicists.
    · Share on Facebook
  • plastic_avatar
    plastic_avatar Posts: 747
    Options
    I wondered about that...
    The Thrifty Setups in Mah House Big thrifty stereo in the basement w/ my custom SDA-1C (built with help from kind forum members) * Beautiful 1966 MCM GE console upgraded w/ Bluetooth, Dual turntable, and Paradigm speakers in family room * Swanky 1980 Realistic system and great TEAC eq with dancing colored lights in the living room * custom 5B on a system for my Dad * Ye Olde college stereo in the garage
    · Share on Facebook
  • xschop
    xschop Posts: 5,821
    Options
    plastic_avatar wrote: »
    Mine are @xschop beauties.

    The ones in the picture are from my 1C. I wanted to see how the sounded in the stereo slots of the CRS+.

    There's a bit of a hubbub because the people using them in stereo models have, to the best of my knowledge, loved them, but! Only 2 of us, to the best of my knowledge, tried them on SDA models; I liked them in my 1C, but Polk legend DarqueKnight did not like them in his CRS+.

    I'm up to mod any and all of these old Polks. I enjoy it. I've lucked out on my mods, so far, but am always prepared for failure.

    As some have said elsewhere, these parts are getting hard(er) to find. If you mod your own, be sure you want to do it =)

    If you're buying the mids already modded (to replace what's busted on yours, for a good price), go for it. I will say, I'm glad I have a set of modded and unmodded mids that fit both the 1C and the CRS+. I can compare how they sound. I'm still testing the arrangement to see what combo of plugged/unplugged I have in the 1C, but I do know at the very least) me-and-mine prefer the plugged mids on the stereo side.

    There are other plugged SDA's out there. A set of SRS-2's and a set of 2B's that I know of. I had my RTA-8TL's sideways, plugged, and SDA'd with CRS x-overs all year. I will be building another WAF-friendly tower set this summer with MTM configuration (think mini 3.1tl's).

    Hey Steven, you should try a plugged 6502 in the SDA slot as well and tell us what you think.

    Don't take experimental gene therapies from known eugenicists.
    · Share on Facebook
  • plastic_avatar
    plastic_avatar Posts: 747
    Options
    I was tired. I always forget about your awesome customs and the unknown-to-me others!

    6502... [thinking]... I'm flush with 6503 in my M12...

    If I get the 5B back from Dad, I'll swap and listen. I do have one 6502 with the 3D-printed test plug copy...
    The Thrifty Setups in Mah House Big thrifty stereo in the basement w/ my custom SDA-1C (built with help from kind forum members) * Beautiful 1966 MCM GE console upgraded w/ Bluetooth, Dual turntable, and Paradigm speakers in family room * Swanky 1980 Realistic system and great TEAC eq with dancing colored lights in the living room * custom 5B on a system for my Dad * Ye Olde college stereo in the garage
    · Share on Facebook
  • 91rtstealth
    91rtstealth Posts: 125
    Options
    ok so I got the rdo198's this week, and I just got the crossovers and all that jazz in the mail today....now I need to order caps and resistors...

    I see three caps and one resistor in each crossover (pic posted below):

    1. Yellow Mylar (I think) 12uf 100v
    2. Black Electrolytic (I think) 40uf 100v
    3. Blue I-have-no-idea 20uf 50v
    4. and lastly a 2.7ohm 10%5w resistor

    so what all do I need here? and before someone says look at the schematic..I did..and I have almost no clue as to what any of it means...

    I went on madisound to look for Clarity CSA caps in these values and couldn't find what I was looking for..

    what do I need to order and where should I order it from? I'm trying to order all this asap and get these done because I have all kinds of other life-crap to deal with in the next few weeks...



    ub1d10mcky1d.jpg
    · Share on Facebook
  • xschop
    xschop Posts: 5,821
    Options
    Clarity PX?
    Don't take experimental gene therapies from known eugenicists.
    · Share on Facebook
  • 91rtstealth
    91rtstealth Posts: 125
    edited February 11
    Options
    Am I on the right track here?

    Two of these, one for each tweeter circuit. I figure I should put the higher quality CSA cap in the tweeter circuit.
    https://madisoundspeakerstore.com/claritycap-csa-capacitor-250vdc/claritycap-12-mfd-csa-copperconnect-poly-cap-250v/?srsltid=AfmBOoqFvXgG6RF0dqiF6p2rU88GnRv7vWDOuVFEDgcEJgjBemoAKMeW

    Two of these, one for each Stereo driver....
    https://madisoundspeakerstore.com/px-cap-250vdc/claritycap-20-mfd-px-range-polypropylene-caps/?srsltid=AfmBOoqGlZs0QrhXg0cgsmk8scTi77mC3_vM-Rpz3T1r7-IW1IIwZp6n

    Then two of these, one for each Dimentional driver:
    https://partsconnexion.com/claritycap-capacitor-40uf-250vdc-px-series/

    and are these the resistors I need..two of them to be precise?
    https://digikey.com/en/products/detail/vishay-dale/RN60C2701FRE6/21736030?gclsrc=aw.ds&gad_source=1&gad_campaignid=23434098130&gbraid=0AAAAADrbLlgoL5YqUm-9YCs1bHlZIx-xs&gclid=Cj0KCQiA7rDMBhCjARIsAGDBuEAYhb0VvdrRKEqJx_bHRRkl1sAsg1vPREsEykw3_3o-JNdng5k5_d0aAnQ2EALw_wcB


    and lastly, i'm not sure what to get for the "5.8uF Electro" and "750pF Silver Dipped Mica" on the TL upgrade schematic. That's beyond my pay grade..haha...

    do I at least have the caps and resistors correct so far? I wans't sure with the different names..copper connect, metalized polypropylene, etc...
    · Share on Facebook
  • xschop
    xschop Posts: 5,821
    Options
    You can use the 5.6uf caps. Forget the 750pf. It's not needed
    Don't take experimental gene therapies from known eugenicists.
    · Share on Facebook
  • 91rtstealth
    91rtstealth Posts: 125
    Options
    ok so I should order 2 of these....one for each tweeter circuit..and then I have everything I need?

    https://madisoundspeakerstore.com/claritycap-csa-capacitor-250vdc/claritycap-5.6-mfd-csa-copperconnect-poly-cap-250v/



    · Share on Facebook
  • 91rtstealth
    91rtstealth Posts: 125
    Options
    F1Nut's parts list. I have a few missing things noted below in bold:


    SDA SRS 4.1TL parts list (for both boards)

    Polk Audio tweeter
    (2) RD0198-1

    Sonicap capacitor 5% or better tolerance
    (2) .1uF Gen II (replaces the 750pF Silver Mica) I thought I didn't need to worry about the 750pF Silva Mica? What is this for?
    (2) 5.8uF
    (2) 12uF
    (2) 20uF
    (2) 30uF
    (2) 10uF (combine the 30 & 10 to equal the needed 40uF as the largest cap from Sonicap is 30uF)

    Mills Wire-wound 5 watt resistor 5% tolerance
    (2) 2.7ohm MRA-5

    Cardas Quad Eutectic solder

    A short piece of 20 gauge solid copper wire (to extend the lead on the 30uF cap) Where would I find solid copper wire like this? I only have stranded wire...I assume i'll need some for a jumper when I delete the poly switch?

    Hot glue gun (to secure the caps to the board). I don't have one, but I can order one from Amazon easily...any specific glue I need or just any old hot glue will do?
    · Share on Facebook
  • xschop
    xschop Posts: 5,821
    Options
    Looks good. F1 can chime in about his bypass cap choice. I think he omitted it in the end.
    Any hot melt glue will work.
    Don't take experimental gene therapies from known eugenicists.
    · Share on Facebook
  • Unknown
    Unknown
    Options
    This content has been removed.
  • 91rtstealth
    91rtstealth Posts: 125
    Options
    I shouldn't need to double up any caps if I get two of these, correct?

    https://partsconnexion.com/claritycap-capacitor-40uf-250vdc-px-series/


    and thanks for the correciton on the resistors..once I get a definitely OK on everything, i'll make a list and place an order once I get the green light from ya'll..I don't want to accidentally order the wrong stuff..
    · Share on Facebook
  • 91rtstealth
    91rtstealth Posts: 125
    Options
    ok so is that all of the parts i'm going to need?
    · Share on Facebook
  • xschop
    xschop Posts: 5,821
    Options
    Will he need the 1/4" female fastons for the -198 tweets?
    Don't take experimental gene therapies from known eugenicists.
    · Share on Facebook