© Good Hifi 2007

Glue rings to the back

A manual

© Good Hifi 2007

Disclaimer:

Good Hifi or persons acting on behalf of Good Hifi will take no responsibility for refoams performed by third parties. Any person performing a refoam with rings bought from Good Hifi is responsible for his or her own repair.

Please note you are free to share this file with other people. Any commercial use is prohibited.

Good Hifi

February 2007

© Good Hifi 2007

Materials

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Remove old ring

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Remove old ring• Cut the old ring.

• Remove as much as possible.

• Beware: the old ring is pretty dirty stuff. Be careful with your clothes, table cover etc.

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Remove from back

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Remove from back• Use a knife or your nail to remove as

much foam and glue from the back of the membrane as you can.

• By bending the cone a little it gets easier. Don’t bend to far!

• If you remove the ring it’s possible you tear a small layer of paper of the woofer’s cone – that’s no problem (former picture).

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Clean the frame

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Clean the frame• Cut as much foam us you can, using a

sharp knife.

• Cut as much old glue as you can – you can leave some glue if you want.

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Remove foam-left over

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Remove foam – left over• On the frame there will be some foam left.

Remove it by using a cloth with some alcohol (or similar) on it.

• If you want, you can try to remove any grease left on the frame.

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Check woofer

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Check woofer• Look at the membrane and the frame. Is it

really clean?

• Press the woofer downwards a few times.

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Glue ring to cone

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Glue ring to cone• ‘Fold’ the ring behind the cone.

• Lift the cone a little, put a little glue between ring (inner ‘lip’) and cone.

• Repeat this, working your way around the woofer.

• Spread the glue if you want. You can also spread the glue by moving the ring around a little.

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Apply pressure

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Apply pressure• Push the ring to the back of the cone.

• Remove any glue that’s to much.

• Put something on the inner side of the ring applying pressure to ring and come. You can use a cup, a small pan, ….. Leave it for a few hours.

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Glue ring to frame

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Glue ring to frame• Is the inner part glued OK?? Glue is dry??

• Lift the ring a little, put a little glue between ring (outer part) and frame.

• Repeat this, working your way around the woofer.

• Spread the glue if you want – slide your finger around the ring.

• Apply pressure, using a tool like a pan…

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Glueing to frame - hint• Center the ring?

Play a very low tone (5 Hz / 10 Hz) over the woofer at a very low level while the glue is still wet. The woofer will tend to center itself.

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Test woofer

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Test woofer• The glue is dry?• Play my test-signals over the woofer.

Listen if you hear any scraping sounds. Push the woofer (while not playing!) a few times – feel if there’s any scraping. If the woofer is not centered (i.e. you feel or hear the scraping), remove the ring an apply another one – centered.

• Everything OK? Enjoy your ‘new’ woofer!