Switchable Impedance Cabinet

Discussion in 'Amp Tech Center' started by DCW74, Oct 24, 2018.

  1. DCW74

    DCW74 Tele-Meister

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    If I want to make a 8 ohm to 16 ohm cabinet, would it be possible to just add a switchable inductor in series with my existing speaker?

    For example, I have an Eminence Legend 1518. The nominal impedance is 8 ohms. DC resistance is 7.16 ohms. Resonance is 82 Hz. A 13.9 mH inductor has a resistance of 7.162 ohms at 82 Hz. So shouldn't I be able to add a DPST on/on switch in series with the inductor to double my impedance? In doing so, would I be able to keep the dynamics of my original speaker intact?
     
  2. fmmlp

    fmmlp TDPRI Member

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    Probably your speaker will sound different with a random inductor in series. If such inductor has a series R near 8 ohms, why not add a non inductive R of 8 ohms in series?
     
  3. DCW74

    DCW74 Tele-Meister

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    I'm just trying to figure out a reactive load. So I'll probably just end up sticking with a smaller speaker to put in there. I tend to make things more difficult than necessary.
     
  4. noah330

    noah330 Friend of Leo's

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  5. Viejo

    Viejo Tele-Afflicted Silver Supporter

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    Last edited: Oct 24, 2018
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  6. darren7

    darren7 Tele-Holic

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    With multiple speakers, it can be done by running the speakers in series or in parallel. I’m not sure how one would go about making a multi-impedance cabinet with only a single driver.
     
  7. W.L.Weller

    W.L.Weller Tele-Holic

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    Would an inductor rated for the power handling that you'd need be that much cheaper than an additional speaker?

    As far as the speaker sounding the same, I can't imagine how it would. And even if it sounded similar enough, the amp would certainly sound different between the 8 and 16 ohm taps on the OT. What about the heat generated?
     
  8. gusfinley

    gusfinley Tele-Afflicted

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    The question is why? Are you trying to go for impedance matching? Do you need the full 150 Watts possible? Is this with a solid state or

    For Quick and dirty, you could just put a 150 Watt 8 ohm resistor in series to get "16 ohms." A resistor in series shouldn't have much of an affect on tone.
     
  9. DCW74

    DCW74 Tele-Meister

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    To answer the question of why: I just want to experiment with different ways of accomplishing the same goal. I have an equal amount of fun figuring this stuff out as I do playing with my creations.
     
  10. VintageSG

    VintageSG Friend of Leo's Ad Free Member

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  11. DCW74

    DCW74 Tele-Meister

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