SDA SRS Crossover parts list

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2

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  • gregmoyers
    gregmoyers Posts: 140
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    m0g3zop4oegs.png
    Found this so makes sense. I think using 22ohm in place of 22.5 will be fine for T2 and 3.
  • Gardenstater
    Gardenstater Posts: 4,281
    edited June 2023
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    That's interesting but what you'd want to see is sPL in dB vs frequency for all 4 tweeters separately and their summation. Where did you get that....I think I remember seeing it somewhere but don't remember where.
    George / NJ

    Polk 7B main speakers, std. mods+ (1979, orig owner)
    Martin Logan Dynamo sub w/6ft 14awg Power Cord
    Onkyo A-8017 integrated
    Logitech Squeezebox Touch Streamer w/EDO applet
    iFi nano iDSD DAC
    iPurifier3
    iDefender w/ iPower PS
    Custom Steve Wilson 1m UPOCC Interconnect
    iFi Mercury 0.5m OFHC continuous cast copper USB cable
    Custom Ribbon Speaker Cables, 5ft long, 4N Copper, 14awg, ultra low inductance
    Custom Vibration Isolation Speaker Stands and Sub Platform
  • Gardenstater
    Gardenstater Posts: 4,281
    edited June 2023
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    Was there any explanation of the key in that? I don't understand what V(R6:1), V(R7:1), etc. signify. Obviously it is Voltage but are they locations on the PCB where the measurement is taken? Doesn't compute.
    George / NJ

    Polk 7B main speakers, std. mods+ (1979, orig owner)
    Martin Logan Dynamo sub w/6ft 14awg Power Cord
    Onkyo A-8017 integrated
    Logitech Squeezebox Touch Streamer w/EDO applet
    iFi nano iDSD DAC
    iPurifier3
    iDefender w/ iPower PS
    Custom Steve Wilson 1m UPOCC Interconnect
    iFi Mercury 0.5m OFHC continuous cast copper USB cable
    Custom Ribbon Speaker Cables, 5ft long, 4N Copper, 14awg, ultra low inductance
    Custom Vibration Isolation Speaker Stands and Sub Platform
  • gregmoyers
    gregmoyers Posts: 140
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    It’s from an old conversation I ran across. F1nut may know more.
  • gregmoyers
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    Finished the rebuild. Came out great. Really opened up the soundstage. Sound better than ever. 3rc7o7yd8mo4.jpeg
    inegxyejq1xa.jpeg
    290lxzdyb37g.jpeg
    iv350zf7nofe.jpeg
  • westmassguy
    westmassguy Posts: 6,850
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    Ver nice!
    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

    dhsspeakerservice.com/
  • pitdogg2
    pitdogg2 Posts: 24,927
    edited December 2023
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    Who did you buy the 22.5 path audio resistors from?
  • gregmoyers
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    Parts Connexion
  • pitdogg2
    pitdogg2 Posts: 24,927
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    gregmoyers wrote: »
    Parts Connexion

    Special order, how long of a wait?
  • gregmoyers
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    Took about 2 months.
  • gregmoyers
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    I had given up and was going to use 22’s and then they finally showed up. Parts Conn is pretty bad with communication. I think I got them for free actually.
  • pitdogg2
    pitdogg2 Posts: 24,927
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  • gregmoyers
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    I have 4 22’s if anyone wants em.
  • gregmoyers
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    Ha
    Anyone notice whats wrong with my pics???
    Winner gets 4 ea Mills 1 ohm resistors (poly switch eliminators) 😁
  • skipshot12
    skipshot12 Posts: 1,074
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    I did, the floor needs dusting…..
  • F1nut
    F1nut Posts: 50,086
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    You've got a red wire going nowhere.
    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

  • VR3
    VR3 Posts: 28,310
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    It allows the sound to drain
    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
  • xschop
    xschop Posts: 4,837
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    gregmoyers wrote: »
    Ha
    Anyone notice whats wrong with my pics???
    Winner gets 4 ea Mills 1 ohm resistors (poly switch eliminators) 😁

    Where do you ground the Path resistors?
    Don't take experimental gene therapies from known eugenicists.
  • VR3
    VR3 Posts: 28,310
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    to tweeter ground
    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
  • gregmoyers
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    To tweeter neg tab/gnd.
  • xschop
    xschop Posts: 4,837
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    But is it the correct Path, or Path of least resistance?
    Don't take experimental gene therapies from known eugenicists.
  • Gardenstater
    Options
    Perhaps those could be run through the window to a dedicated grounding rod pounded into the ground.
    George / NJ

    Polk 7B main speakers, std. mods+ (1979, orig owner)
    Martin Logan Dynamo sub w/6ft 14awg Power Cord
    Onkyo A-8017 integrated
    Logitech Squeezebox Touch Streamer w/EDO applet
    iFi nano iDSD DAC
    iPurifier3
    iDefender w/ iPower PS
    Custom Steve Wilson 1m UPOCC Interconnect
    iFi Mercury 0.5m OFHC continuous cast copper USB cable
    Custom Ribbon Speaker Cables, 5ft long, 4N Copper, 14awg, ultra low inductance
    Custom Vibration Isolation Speaker Stands and Sub Platform
  • Schurkey
    Schurkey Posts: 2,100
    edited January 10
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    gregmoyers wrote: »
    Ha
    Anyone notice whats wrong with my pics???
    Winner gets 4 ea Mills 1 ohm resistors (poly switch eliminators) 😁
    Steel self-drilling/self-stripping screws used to secure the ends (and maybe steel screws for the four center standoffs) of the top panel to the inductors?

    Overall, kinda suspicious of the mechanical stability of that top panel. Seems to be attached in six places, but to the plastic edges of the three big inductor bobbins. I suspect it'll sag over time when mounted in the speaker cabinet due to gravity and vibration.
  • Gardenstater
    Gardenstater Posts: 4,281
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    There's a hole in the upper plexiglass board that is missing a screw and standoff.
    George / NJ

    Polk 7B main speakers, std. mods+ (1979, orig owner)
    Martin Logan Dynamo sub w/6ft 14awg Power Cord
    Onkyo A-8017 integrated
    Logitech Squeezebox Touch Streamer w/EDO applet
    iFi nano iDSD DAC
    iPurifier3
    iDefender w/ iPower PS
    Custom Steve Wilson 1m UPOCC Interconnect
    iFi Mercury 0.5m OFHC continuous cast copper USB cable
    Custom Ribbon Speaker Cables, 5ft long, 4N Copper, 14awg, ultra low inductance
    Custom Vibration Isolation Speaker Stands and Sub Platform
  • Schurkey
    Schurkey Posts: 2,100
    edited January 10
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    I even LOOKED and didn't see that. Maybe my subconscious was trying to tell me it didn't have proper support.
    Schurkey wrote: »
    Steel self-drilling/self-stripping screws used to secure the ends (and maybe steel screws for the four THREE center standoffs) of the top panel to the inductors?

    Overall, kinda suspicious of the mechanical stability of that top panel. Seems to be attached in six FIVE places, but to the plastic edges of the three big inductor bobbins. I suspect it'll sag over time when mounted in the speaker cabinet due to gravity and vibration.
  • Gardenstater
    Gardenstater Posts: 4,281
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    I only found it cause I was trying to figure out what you were talking about. So I owe it all to you ha ha. And my mother and father and...........long story.
    George / NJ

    Polk 7B main speakers, std. mods+ (1979, orig owner)
    Martin Logan Dynamo sub w/6ft 14awg Power Cord
    Onkyo A-8017 integrated
    Logitech Squeezebox Touch Streamer w/EDO applet
    iFi nano iDSD DAC
    iPurifier3
    iDefender w/ iPower PS
    Custom Steve Wilson 1m UPOCC Interconnect
    iFi Mercury 0.5m OFHC continuous cast copper USB cable
    Custom Ribbon Speaker Cables, 5ft long, 4N Copper, 14awg, ultra low inductance
    Custom Vibration Isolation Speaker Stands and Sub Platform
  • stubby2
    stubby2 Posts: 40
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    Looks like you need to swap the big Solen caps with the big Clarity Caps.
    Polk SDA SRS 2A
    Aragon 8008X3
    Aragon Soundstage
    Multiple Digital Sources
  • gregmoyers
    gregmoyers Posts: 140
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    You are correct.
  • stubby2
    stubby2 Posts: 40
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    I'm in the middle of reworking my 1987 vintage SRS crossovers, REALLY like the way you stacked the caps on plexiglass. Now I have to redo my less than stellar effort and mimic your setup!
    Did you use 3/8 plexi?
    Polk SDA SRS 2A
    Aragon 8008X3
    Aragon Soundstage
    Multiple Digital Sources
  • gregmoyers
    gregmoyers Posts: 140
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    Thanks. No just 1/4 is fine. Tricky to cut and drill.