Another SDA CRS, this time the +

corticocortico Posts: 404
edited June 30 in Vintage Speakers
Just got this CRS + pair, seems real wood veneer, but I’m not sure which iteration this is. Probably transitional because it still has the holes where the previous 2 tweeter versions had the blade/blade jack.

I am willing to upgrade it for the RD0198, never heard one before. All it takes is a 5.8uf cap across the 2.7ohm resistor, right?

Thanks for you guidance.

mn8pohn1nvcl.jpeg
ojhpr0z4jled.jpeg

"If it measures good and sounds bad, -- it is bad. If it sounds good and measures bad, -- you've measured the wrong thing." Daniel Von Recklinghausen
Post edited by cortico on

Comments

  • F1nutF1nut Posts: 39,807
    You'll have to plug that hole.

    The TL schematic is posted here.
    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."


  • westmassguywestmassguy Posts: 6,044
    F1nut wrote: »
    You'll have to plug that hole.

    The TL schematic is posted here.

    This ^^^^^, and the 2.7 ohm resistor is already there. You're shunting it with the 5.8uf Capacitor.

    Home Theater/2 Channel:
    Front: SDA-2ATL forum.polkaudio.com/discussion/143984/my-2as-finally-finished-almost/p1
    Center: Custom Built forum.polkaudio.com/discussion/150760/my-center-channel-project/p1
    Surrounds & Rears: Custom Built forum.polkaudio.com/discussion/151647/my-surround-project/p1
    Sonicaps, Mills, RDO-194s-198s, Dynamat, Hurricane Nuts, Blackhole5
    Pioneer Elite VSX-72TXV, Carver PM-600, SVS PB2-Plus Subwoofer
    Cables: Speaker: Furez 10/2 with GLS Locking Banana Plugs
    Interconnect: Furez 10/2 with SpeakONs
    ICs: Custom Furez by Douglas Connections
    Den:
    Bose 901 Series II Continentals Restored, Re-Built Equalizer with Elna Silmic IIs, Sonicaps, and Silver Mica Caps
    Carver CT-3 Pre, Carver C-500

    dhsspeakerservice.com/
    Exclusive Distributor of Gimpod's Custom SDA Circuit Boards

    "And keep her under 70, would you, huh? Betty likes a slow ride"
  • corticocortico Posts: 404
    edited July 2
    Most definitely! I’ll plug the hole with two matching rubber plug caps.

    I liked the way the blade / blade two tweeters version sounded, the dimensional tweeter was unplugged... I know diferente animal.
    Courious about this.
    Thanks
    F1nut wrote: »
    You'll have to plug that hole.

    The TL schematic is posted here.
    F1nut wrote: »
    You'll have to plug that hole.

    The TL schematic is posted here.

    This ^^^^^, and the 2.7 ohm resistor is already there. You're shunting it with the 5.8uf Capacitor.

    "If it measures good and sounds bad, -- it is bad. If it sounds good and measures bad, -- you've measured the wrong thing." Daniel Von Recklinghausen
  • corticocortico Posts: 404
    These sound sweet, very nice and mellow mid range. I toke a picture of a crossover. The stereo mid-bass is the 6510 and the dimensional 6511...

    I measured resistance between meg and pos terminal I got different readings:

    Left 4.9ohm
    Right 5.8ohm
    cdduqh3acnus.jpeg
    mvc8ebkgs1zl.jpeg
    rmfdta5g1f10.jpeg


    7fck6ntguo0e.jpeg
    2ixpdnrachwh.jpeg
    kh6wakwiaxqi.jpeg
    5rxl02qvnmox.jpeg
    "If it measures good and sounds bad, -- it is bad. If it sounds good and measures bad, -- you've measured the wrong thing." Daniel Von Recklinghausen
  • corticocortico Posts: 404
    Ah! Found a loose inductor in one speaker... wow

    670ff4ummd34.jpeg
    aekh0cacbh1t.jpeg
    "If it measures good and sounds bad, -- it is bad. If it sounds good and measures bad, -- you've measured the wrong thing." Daniel Von Recklinghausen
  • F1nutF1nut Posts: 39,807
    That'll be the high one.
    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."


  • monepolkmonepolk Posts: 836
    Yeah I had a similar with the pair I bought.
    http://forum.polkaudio.com/discussion/179087/picked-up-crs/p1
  • corticocortico Posts: 404
    I have soldered the connections and replaced the ties, it's all well secured now.
    Could a 5.6UF cap be used instead of 5.8UF on the TL mod? is just about 3.5% off.
    "If it measures good and sounds bad, -- it is bad. If it sounds good and measures bad, -- you've measured the wrong thing." Daniel Von Recklinghausen
  • F1nutF1nut Posts: 39,807
    If that 5.6uF is +/- 10% and it's -10% it's no longer 3.5% off.
    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."


  • mlistens03mlistens03 Posts: 1,207
    Nice find!
    2 channel
    Speakers: Mission 770 Freedoms
    Integrated amp: Technics SU-v75 and matching tuner
    CDP: Technics SL-PC20
    Cables: Monoprice, Monster, Acoustic Research, and a few generic ones
    TT: Technics SL-3200, direct drive
    Cartridge: Shure M97xE

    Pc gaming setup
    Receiver/amp: Yamaha RX-V665
    Computer: Lenovo g50 (soon to be upgraded to a Dell Precision 690 which is far from stock!!)
    Interconnects: Amazon basics HDMI, Acoustic Research HDMI, Monoprice speaker cables
    Speakers: Boston Acoustics CR75s

    Random equipment on standby:
    Onkyo TX-v940, JBL woofers and tweeters, single Klipsch KG .5, Yamaha guitar amplifier, Peavey Rage 158 guitar amplifier, Kicker comp 12” subwoofer, single Bose 802 series II, a whole bunch of 1”-3” full range drivers, Infinity Crescendo 3007s (on sale), Polk LSi25s
    txcoastal1 wrote: »

    You don't tell her you read the manual, and you tell her you know what the problem is, and you fixed it, because that what men do, fix things
    sure it has a flat response, and sure it has a lot of detail, and yes, it has good and clear lows. But is it enjoyable to listen to? Does it make you grin ear to ear? That’s what really matters.
    Seen somewhere on AudioKarma (I think)
  • corticocortico Posts: 404
    F1nut wrote: »
    If that 5.6uF is +/- 10% and it's -10% it's no longer 3.5% off.

    Good point, thanks.

    "If it measures good and sounds bad, -- it is bad. If it sounds good and measures bad, -- you've measured the wrong thing." Daniel Von Recklinghausen
  • corticocortico Posts: 404
    I have used Clarity ESA and Sonicaps Gen I on crossovers, both excellent.

    For this project, I am thinking of Jantzen Superior for the tweeter and Jantzen Standard for the ones parallel with mid-bass drivers. Anyone used Jantzen caps on these Polks before?
    "If it measures good and sounds bad, -- it is bad. If it sounds good and measures bad, -- you've measured the wrong thing." Daniel Von Recklinghausen
Sign In or Register to comment.

Howdy, Stranger!

It looks like you're new here. If you want to get involved, click one of these buttons!