How to Repair Celestion Greenback Speakers

Written by matthew anderson
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The Celestion Greenback is a guitar amplifier speaker primarily designed for rock guitarists. It is manufactured with a 10-inch and 12-inch-diameter version. Poor sound quality occurs when the speaker cone has been damaged. The solder joints holding the speaker wires in place can be damaged, severing the connection between the speaker and amplifier. This issue almost always causes the amplifier cabinet containing the speaker to stop functioning.

Skill level:

Things you need

  • Screwdriver
  • Gauze
  • Scissors
  • Clear fingernail polish
  • Soldering iron
  • Electrical solder

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    Speaker Cone Repair

  1. 1

    Unplug the speaker cabinet that contains the Celestion Greenback speaker. This includes removing the connection to the amplifier and electricity.

  2. 2

    Remove the speaker grill. You should see a tear in the fabric of the speaker cone.

  3. 3

    Apply clear fingernail polish to the edges of the tear. Place the edges back together. The fingernail polish serves as an adhesive to hold the speaker cone together.

  4. 4

    Cut a piece of gauze slightly larger than the tear.

  5. 5

    Cover the tear with the gauze. Use fingernail polish to hold it in place.

  6. 6

    Put the speaker grill back onto the speaker cabinet.

    Wiring Repair

  1. 1

    Plug in the soldering iron to give it time to warm up.

  2. 2

    Remove the back panel from the speaker cabinet. Locate the disconnected wire and the tab it should be attached to on the back of the Greenback speaker. There should be a blob of solder on the metal tab to show where the wire used to be connected.

  3. 3

    Touch the end of the wire and the end of the coil of electrical solder to the blob of solder.

  4. 4

    Touch the tip of the soldering iron to where the wire, solder and speaker tab touch. The soldering iron causes the solder to melt onto the wire and speaker tab. The solder hardens almost instantly once the soldering iron is removed. This attaches the wire securely to the speaker.

  5. 5

    Put the back panel back onto the speaker cabinet.

Tips and warnings

  • The speaker grill on a guitar amplifier or cabinet is a metal screen placed over the speakers. An undamaged speaker grill should prevent most damage from occurring to the speaker cone. A damaged grill should be replaced as soon as possible.
  • A Celestion Greenback speaker can stop functioning properly if the voice coil is damaged. This part cannot be repaired. The speaker needs to be replaced in this situation. A damaged voice coil is harder to detect because it can potentially cause the same issues that a damaged speaker cone or disconnected wiring cause.

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