Due to their age, the most common issues with the AT-40 revolve around component aging. Because they are often driven hard, they are susceptible to specific, fixable damage. 1. Woofer Foam Rot or Cloth Surround Damage
Heat up the solder joints on the underside of the board to remove the old capacitors. Insert the new polypropylene film capacitors. (Note: Film caps are non-polarized, meaning they can face either direction). cerwin vega at40 specs fix
Recapping the crossover.
Locate the small openings or weep holes in the casing of the rotary switch or potentiometer. Spray a short, targeted burst of DeoxIT D5 directly into the component. Due to their age, the most common issues
The stock AT-40 cabinet resonates at high volume. For $10 in materials, fix this: Woofer Foam Rot or Cloth Surround Damage Heat
You need a 10-inch Cerwin Vega Refoam Kit . These are widely available from retailers like Simply Speakers or Midwest Speaker Supply. The Process: