Is it possible....

Discussion in 'Cabinets & Speakers' started by GregM, Jan 8, 2021.

  1. fitz288

    fitz288 Apprentice Fermi's Paradox Analyst Silver Supporting Member

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    The two 8 ohm Seventy-80s could be wired as 1 - 16 ohm in series, 1 - 4 ohm in parallel, or 2 - 8 ohm separately.
    The SC20H can accommodate any of the 3 configurations, so the answer to "is it possible?" is yes.
    First step would be to get the SC20H, and decide on the speaker hook up after that.
    I'm just surprised that no one has criticized plugging an SC20H into a pair of Seventy-80s.
     
  2. Adieu

    Adieu Well-Known Member

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    Oh obviously that's a travesty
     
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  3. JBA

    JBA Well-Known Member

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    Hey, easy easy... the seventy 80’s gets such a bad wrap but there is NOTHING wrong with them plugged into a SC20H when the amp is turned off.
     
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  4. fitz288

    fitz288 Apprentice Fermi's Paradox Analyst Silver Supporting Member

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    I have a pair of MX112s under my DSL20H, and I like Seventy-80s, but I play so bad I can't tell if they make a difference.
     
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  5. JBA

    JBA Well-Known Member

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    :lol::lol:
     
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  6. Greg70

    Greg70 Member

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    Just remember that solid state amps will fry if the two output leads ever get shorted. Be sure they are insulated and tucked away if you ever disconnect the speakers from the power amp.
     
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  7. GregM

    GregM Well-Known Member

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    T
    The spades on them have this plastic protectors over them, but I will tape over them when I label them anyhow,
    Thank you
     
  8. GregM

    GregM Well-Known Member

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    Sorry, big bump, just took the back off and there is 2? Ground wires I wasn't expecting? Or is this the solid state thing above poster was talking about IMG_20210213_164418.jpg so is this the solid state part @Greg70 was talking about or is it just a generic earth?
    My Lil dsl5cr doesn't seem to have one...
    IMG_20210213_164355.jpg
    Sorry and thank you
     
  9. GregM

    GregM Well-Known Member

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    Oh and ps, looking at a joyo cab now with 2 jensen p12q speakers for like 650 Australian, speaker by itself goes for 220 here so seems a kind of a bargain, optional cab back on or off, 16, 8 in stereo and 4 ohm plug ins
     
  10. GregM

    GregM Well-Known Member

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    I've guessed yes, wired it up, and taken said offending wires from my fender and just have a 2 wire mono cable going one to each speaker with a jumper in between.
    I have hooked up said celestion 70 80s and just need to plug the speaker wire into it now ( have hooked speakers up to a 1/4 inch female jack)
    It's late thou and I need to water the lawn so it's a morning job, I am very excited thou, I know no one likes 70 80s but I have heard they go well in high gain amps so I'm thinking my Lil dsl5cr will love it
     
  11. fitz288

    fitz288 Apprentice Fermi's Paradox Analyst Silver Supporting Member

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    Not sure what this means. Do you have them series wired up to a single cord @ 16 ohm?
    (tip to (+), jumper from (-) to (+), (-) to barrel?)
    Check the tip to barrel on the cord end with a meter before you plug in and power up.
     
  12. GregM

    GregM Well-Known Member

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    Yes, series wired up, 1 going to one speaker +, the other going to the other speaker -, and a jumper criss crossing them
     
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  13. GregM

    GregM Well-Known Member

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    Well when I say a single cord it's a figure 8 cord, only cord at jaycar that would do 2 80 watt speakers I'm told
     
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  14. Greg70

    Greg70 Member

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    That's weird. I've never seen a third conductor going to a speaker before. I'm ASSUMING it's a ground but can't say for certain. Check inside the chassis or use a meter to see if those yellow wires are common to the chassis. Either way, I would still isolate them from the speaker outputs.
     
  15. Gene Ballzz

    Gene Ballzz Well-Known Member

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    WOW! Just WOW?
    I'm Otherwise Speechless!
    Gene
     

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