Guitar cabinet speaker replacement

Discussion in 'Amps/Cabs Tech Corner: Amplifier, Cab & Speakers' started by paboucher, Sep 11, 2019.

  1. paboucher

    paboucher Member

    Sep 10, 2019
    I have an old VT guitar amp (tubes and trans) with a 6 speakers cabinet, each speaker being 10 inches in diam. One of them is torn up so I have to replace it or repair it. But I can't find the exact same speaker anywhere nor the kit to repair. There are not much info on it: DWJ6 VT80005. The cabinet is a 6G10H from VT (Vibration Technologies from Canada) and is rated 8 Ohms and 140 Watts. I have checked the resistance on the unplugged torn speaker and got 5.0 Ohms. The speakers are arranged in 2 series of 3 speakers which (the series) are plugged in parallel. I cannot see how I could come up with something close to 8 Ohm by unplugging one or two speakers.
    Any suggestion of speakers to replace or kit to repair?
  2. amphog

    amphog Member

    Nov 28, 2009
    5 ohms on your meter would be a 8 ohm speaker. You will be able to find something that is close from Eminence, match the magnet weight, and cone/surround type.
    Humble Texan Fan and pdf64 like this.
  3. Humble Texan Fan

    Humble Texan Fan Member

    Oct 20, 2015
    Scandinavian as in 'dynamite'
    ... and if still in doubt: email or phone Emi on the matter
  4. 71strat

    71strat Member

    Oct 7, 2013
    It may use a Celestion.
    Vibration Technology VT Ontario Canada - Jedistar


    Vibration Technology LTD

    1950 Ellesmere Road, Unit 12

    Scarborough, Ontario Canada. 1970s.

    Some reports made in Uxbridge Ontario. According to guitarscanada forum VT amps were transistor based not valve and used Celestion speakers from the UK.

    Models included:

    VT Phasor Twin, Model 2G12A (late 1970’s), 60 watt solid state guitar combo with closed back.
  5. Vanyu

    Vanyu Member

    Oct 11, 2015
    Let's break these numbers down a little bit and see exactly what each of these speakers are doing.

    We have a nominal impedance of 8 ohms through two series trios running in parallel (correct?), so this means each series trio is running at 16 ohms. To get to 16 ohms from a series trio means these speakers have a nominal impedance of 5.33 ohms.

    Your closest substitute would be a 4 ohm speaker. They're a little uncommon, but certainly not impossible to find. The difference in impedance will likely be negligible.

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