Another ohm amp/cabinet question

Discussion in 'Cabinets & Speakers' started by Headache, Nov 13, 2019.

  1. Headache

    Headache Active Member

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    Here is what I'm rolling with.
    TSL 100 and a 1960a
    Speakers in my cabinet are 4 celestions in 16ohm.

    What setting should I use to be safe and still get the most out of my gear?

    IMG_20191113_203848780_compress89.jpg IMG_20191113_203838831_compress29.jpg

    I've read through a bunch of sites and just get more confused ha ha
    Thanks.
     
    Last edited: Nov 13, 2019
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  2. South Park

    South Park Well-Known Member

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    The head is 16 ohms on the left. The cab is 16 ohms on the right. It’s the law ohms law
     
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  3. ampmadscientist

    ampmadscientist Well-Known Member

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    Start the reactor... Free Mars!
    Plug a speaker cable into the cabinet.
    Measure the end of the speaker cable with an ohm meter, what is the reading?
    Don't assume, measure this first.
    The cabinet impedance depends on how the speakers are wired inside the cabinet.

    And, this is only one cabinet? Not Two?
    Now report your ohm reading.
     
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  4. ampmadscientist

    ampmadscientist Well-Known Member

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    Start the reactor... Free Mars!
    How do you know it's 16 ohms? did you measure it?
    Stop assuming things.
    This is not how professionals work on sound equipment.
     
  5. SkyMonkey

    SkyMonkey Well-Known Member

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    True. The plate on my 1912 still says 150W 8 Ohm because I know which speaker I swapped it for.
    But I would tell the next guy if I sold it on.
    Others might not be as scrupulous or diligent.

    Assuming it measures roughly 15 Ohm at the right hand jack with the switch to MONO, that is correct and should be connected to the amp in the 16 Ohm only jack.
    You sound inexperienced so I will mention that you need to use dedicated speaker cables to connect speaker cabinets.
    NOT instrument cables (i.e. NOT a guitar lead). Google the subject for more info.
     
  6. ampmadscientist

    ampmadscientist Well-Known Member

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    Actually
    if a 16 ohm cabinet is wired correctly it should read (ohm meter) right about 12.6 ohms.
    If an 8 ohm cab is measure it will read about 6.8 ohms.

    But when hooking speakers to an amp (you already know) that one must verify first.

    Four 16 ohm speakers can be wired total 16 ohms, or total 4 ohms.
    So let's make sure before connecting to the amp. (you already know this also)

    I posted this for anybody who doesn't know already.
     
  7. SkyMonkey

    SkyMonkey Well-Known Member

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    Oops. My bad. Just looked at the Celestion site. 16 Ohm G12T-75s (most usual stock speaker) measure 12.9 (ish) Ohm DC resistance.
     
  8. Headache

    Headache Active Member

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    1 cabinet, measures 12.4
     

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