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Unscrew the plastic terminal cup on the back of the speaker cabinet.
Look at the rear terminal plate. Remove the fuse cap and inspect the glass fuse. Replace blown fuses only with the exact fast-blow rating specified on the terminal cup.
Immediately turn the knobs on the outside back and forth rapidly 30 to 50 times. This friction, combined with the cleaner, scrapes away the oxidation and grime. cerwin vega at40 specs fix
Disconnect the speaker from the amplifier. Unscrew the rear terminal plate or crossover plate to access the internal bodies of the adjustment dials.
If you found this article, your speakers likely exhibit one of three specific symptoms. Let's diagnose the problem by listening and looking.
Replace the aging electrolytic capacitors on the crossover board with high-quality film capacitors of the exact same microfarad ( This public link is valid for 7 days
If you search for "Cerwin Vega AT40 specs," you will often find these incorrect values:
Recapping the crossover board with modern film capacitors.
Do you have experience using a or a multimeter ? Can’t copy the link right now
Restoring a pair of Cerwin Vega AT-40 speakers is a very rewarding project. It's a chance to learn a new skill, connect with a classic piece of audio history, and save a lot of money compared to buying a modern equivalent.
Use shims or a test tone to ensure the voice coil is centered so it doesn't rub against the magnet.
: Older units may suffer from loose internal bracing or dried-out glue on the seams, which can cause audible rattles at high volumes. Cerwin Vega 10 Inch Foam Speaker Repair Kit FSK-10AR (Pair)