Dumb question..

Discussion in 'Cabinets & Speakers' started by Marcomel79, Sep 20, 2021.

  1. Marcomel79

    Marcomel79 Well-Known Member

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    Hey Marshall folks, i thought i would start a thread to see how many insults i can get for asking a stupid question, so here it is: i have two 16 ohm speaker and i would like to try them with an amp that only has a 16ohm tap. Will a combination of series/parallel wiring keep the load at 16ohm? I know it works with four speakers....
     
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  2. SkyMonkey

    SkyMonkey Well-Known Member

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    No.
    Sorry.
    There is a gizmo the can sit between the amp and speaker cabs, but I have forgotten its name.
     
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  3. fitz288

    fitz288 Well-Known Yinzer Silver Supporting Member

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    Re-amp.
    My BadCat takes a single input from any of 4/8/16 from the amp, and doesn't care what speakers you use.
     
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  4. spacerocker

    spacerocker Well-Known Member

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    What is the amp? Most 100W valve amps can tolerate a 1 step mismatch, so if you wired the speakers in series (=32 Ohm) it should be OK....
     
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  5. RLW59

    RLW59 Well-Known Member

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    Weber Z-Matcher. Lets you match just about any imaginable combination of amp and speaker impedances. When I had one it seemed to not color the sound in any way.
    ------------------------
    Two 16 ohm speakers can be wired for 8 ohms in parallel or 32 ohms in series. Those are the only possible options.

    Series/parallel (and parallel/series) requires at least 3 speakers, but 4 is much more common so we'll talk about that.

    Let's say you have four 16 ohm speakers. You connect speaker 1 in series to speaker 2 for 32 ohms, connect speaker 3 in series to speaker 4 for 32 ohms, then connect the two pairs together in parallel for a total load of 16 ohms.

    Or you connect speaker 1 in parallel to speaker 2 for 8 ohms, connect speaker 3 in parallel to speaker 4 for 8 ohms, then connect the two pairs together in series for a total load of 16 ohms.
    ----------------------------
    What amp do you have? 16 ohm only is very uncommon.
     
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  6. Marcomel79

    Marcomel79 Well-Known Member

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    Its a Marshall DSL5. It only has a 16ohm output. But i know that if you have four 16ohm speakers wired in a combination of series/parallel the final load stays 16ohm. Is that not possible with two speakers?
     
  7. Marcomel79

    Marcomel79 Well-Known Member

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    Its a Marshall DSL5. I also have a jmp clone but the dsl is more for night practice as it has a MV...
     
  8. PelliX

    PelliX Well-Known Member

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    No, that is not possible with two 16 Ohm speakers. Either you double or halve the impedance - you cannot attach both without changing it (parallel vs series). Any cheap attenuator will allow you to attach a load to which the amp is agnostic - however, the sound quality doesn't get better. 32 Ohms would probably be OK on the amp, I wouldn't try 8, though.
     
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  9. Marcomel79

    Marcomel79 Well-Known Member

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    Yeah i guess ill try wiring them in series and see what happens... wont be playing loud anyway...
     
  10. anitoli

    anitoli Well-Known Member Gold Supporting Member

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    Not possible with two 16's you would need two 8's in series.
     
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  11. Marcomel79

    Marcomel79 Well-Known Member

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    I guess it wont hurt wiring them in series...
     
  12. fitz288

    fitz288 Well-Known Yinzer Silver Supporting Member

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    Dumb question for your dumb question:
    If the internal Ten-30 is 16ohm, and you can connect an external extension of 16 ohm, is it using both and putting a 8 ohm load on the OT?
    If so, you should be able to disconnect the Ten-30 and rig up two external 16 ohms.

    upload_2021-9-20_12-32-33.png
     
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  13. Marcomel79

    Marcomel79 Well-Known Member

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    The speaker for the amp is connected externally with a speaker cable. Theres no internal connection... if i understood your question correctly...
     
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  14. fitz288

    fitz288 Well-Known Yinzer Silver Supporting Member

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    Not exactly plug and play, but you can unplug the internal at the speaker and rewire for another external, basically using the combo as a head.
    But if the external jack is a switching jack that shuts off the internal, never mind.
     
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  15. Marcomel79

    Marcomel79 Well-Known Member

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    Btw the way, im building a 2x12 cabinet for the plexi clone (18W) and i have a greenback (waiting for my second one in the mail) and today i connected the ten30 with the greenback and it sounded killer.... i can only imagine with two GB'...
     
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  16. fitz288

    fitz288 Well-Known Yinzer Silver Supporting Member

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    So both speakers work when the green back was plugged in?
    That would mean the amp will take an 8 ohm load (2 ~ 16's in parallel).
     
  17. Marcomel79

    Marcomel79 Well-Known Member

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    Sorry, that was through the mini plexi! Poor wording!
     
  18. PelliX

    PelliX Well-Known Member

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    It's not switching - it's the fact that it only has one output jack, namely 16 Ohm. Afaik DSL's do not have switching jacks for speakers, at least I've never seen them.
     
  19. LPMarshall hack

    LPMarshall hack Well-Known Member

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    Hope this isnt too much of a derail...but will this device allow you to connect your Marshall to say...one 16 ohm 4x12 cab to another 8 ohm 2x12?
     
  20. fitz288

    fitz288 Well-Known Yinzer Silver Supporting Member

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    So when an external 16 ohm is plugged in, and the internal is still on, the amp is doing what with the 2 16 ohm loads?
     

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