distortion, amp checks "ok", how to check for blown speakers?

Discussion in 'Amps and Cabs [BG]' started by Sponge Bobo, Apr 1, 2003.

  1. Sponge Bobo

    Sponge Bobo

    Apr 1, 2003
    Got a new battery for my Dean bass, had the amp checked out and it's supposedly ok (SVT Classic), and now I all that's left is the Ampeg Classic 8x10 cabinet.

    How can I check for blown speakers? Sometimes my ears decieve me so is there a more scientific way than just trying to hear each speaker one by one?

    Thanks for any help for this newbie :) :bassist:
  2. stevekim


    Feb 11, 2000
    los angeles, ca
    take out the grill and carefully press each speaker in. if you've got a blown voice coil you should feel something rubbing as you push in and out. good speakers should move smoothly. other than that, look for tears, rips, etc.

  3. Correct.

    Place spread four fingers of each hand at 9:00 and 3:00 on the cone.
    Push in gently.
    Voice Coil rub is very subtle.
    You can feel it in your finger tips.
    (You may hear very faint rubbing sound, but don't count on it.)

    Good coils will feel absolutely smooth and springy.
  4. What they said. Plus - the good ol' battery test... (shows you if a speaker coil is completely blown, or if one is miswired, or if one isn't wired)

    Plug a speaker cable into the cab. Touch a 9v batt to the other end of the cable, "+" to the tip and "-" to the sleeve. If all voice coils are good, & all speakers are wired and in phase, all 8 cones should extend.