Speaker Repair

Home stereo speakers can often be brought back to life with a bit of care.

The most common repair is the replacement of the foam that surrounds the woofers.  The original foam deteriorates and crumbles away over time, leaving the speakers with weak low frequency response.  Complete loss of the foam may cause the woofer to rattle as the voice coil impacts against the magnet pole.

Replacement of the foam is a straightforward process consisting of: 1) removing the old foam and glue from the frame and cone; 2) removing the dust cap and centering the voice coil with shims; 3) installing a fresh foam ring; 4) re-attaching the dust cap; and 5) testing to make sure all is well.

The “refoaming” process takes several days as there are many gluing steps involved.  I use two types of adhesive on each speaker – a quick-set solvent-based adhesive, and a slower setting water-based adhesive.

Complete speaker “reconing” involves replacement of all moving parts: Cone, voice coil, and “spider”.  The resulting rebuilt speaker is as good as new.  This is generally only necessary for “pro” speakers, but can be done to revive damaged home speaker drivers as well.

Additional services include:

    • Installation of new crossover capacitors
    • Replacement of the grill cloth
    • Cabinet refinishing

I’ve restored many major brands, including AR, Advent, Altec, Bose, Boston Acoustics, Cerwin Vega, Bose, Dahlquist, Dynaco, Electro-Voice, Genesis, Infinity, JBL, Klipsch, Marantz, Martin Logan, McIntosh, Mission, Ohm, Philips, Pioneer, and Polk.

I specialize in electrostatic speakers from Acoustat and can repair and upgrade your high voltage electronic interfaces.

Please contact me with your speaker repair questions or to inquire about pricing.