sda srs 2.3 polyswitch removal

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wilyJ
wilyJ Posts: 2
in Troubleshooting
I have the sda 2.3 speakers, serial# - SRS 2.3 L 3955, they have always sounded muffled with no treble - am wanting to remove the polyswitches as some members have suggested. I am trying to identify them correctly - is a schematic available for the crossover or is a part number available. Pictures would be great - I'll take anything! Already modded the crossovers with new audio film capacitors - made no difference to the sound. Wanting to try this first before replacing all the tweeters.
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  • SeleniumFalcon
    SeleniumFalcon Posts: 4,386
    edited August 2022
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    Hello, here is the crossover schematic, the poly switch (Safetyguard) is shown. You should be able to test the switch with a volt/ohm meter to see if it is open.

    bioxytvwi4h1.png
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  • Lee Berger
    Lee Berger Posts: 15
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    I'm looking at the right channel board and I don't see any safety guard components. Looks like it should be physically located next to C5.wns8s5oq2r52.jpeg
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  • michaeljhsda2
    michaeljhsda2 Posts: 2,216
    edited September 2023
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    Looks like it's just above the Molex connector.
    SDA SRS 2.3TL's
    Silk Audio MS-90-BT integrated tube amp
    Yaqin MS-20L integrated tube amp
    SDA 2B TL's
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  • michaeljhsda2
    michaeljhsda2 Posts: 2,216
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    nkfgv0239hfg.jpg
    SDA SRS 2.3TL's
    Silk Audio MS-90-BT integrated tube amp
    Yaqin MS-20L integrated tube amp
    SDA 2B TL's
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  • JCL
    JCL Posts: 174
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    I believe that is where mine are on my 2.3’sixord0j06ha0.jpeg
    3m4mgcqvofug.jpeg
    L600 (front), R200 (rear), R200 (rear surround), L400 (center), Sunfire HRS-10 (2)Marantz AV7706Sunfire Cinema Grand, Marantz M8077, Music Hall Stealth, Ortofon bronze cartridge, Parasound Zphono XRM, Sony UBP-X800
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  • michaeljhsda2
    michaeljhsda2 Posts: 2,216
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    Yes
    SDA SRS 2.3TL's
    Silk Audio MS-90-BT integrated tube amp
    Yaqin MS-20L integrated tube amp
    SDA 2B TL's
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  • Lee Berger
    Lee Berger Posts: 15
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    Here's what I think the capacitor values are:
    C1 20uf 50v NP
    C2 40uf 50v NP
    C3 12uf 50V NP
    C4 750pf 100V
    C5 4.4uf 100v
    C6 12uf 50v NP
    C7 5.8uf 50v NP (to T1 +)


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  • F1nut
    F1nut Posts: 52,406
    edited August 2024
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    Lee Berger wrote: »
    Here's what I think the capacitor values are:
    C1 20uf 50v NP
    C2 40uf 50v NP
    C3 12uf 50V NP
    C4 750pf 100V
    C5 4.4uf 100v
    C6 12uf 50v NP
    C7 5.8uf 50v NP (to T1 +)


    The schematics are posted here in the Vintage Speaker section.
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  • Lee Berger
    Lee Berger Posts: 15
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    Yes. I have the schematic, but I was looking for confirmation because it's hard to read some of the values and voltage values are not noted.
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