Tag Archives: corrosive glue

Luxman M-4000A Amplifier Restoration

A customer recently brought in his gorgeous matching Luxman M-4000A power amplifier and C-5000A preamplifier. Both pieces needed a thorough overhaul and the M-4000A needed repairs also.

The legendary Tim De Paravicini designed the original M-4000. The improved and even rarer Luxman M-4000A probably also came from De Paravicini’s hand, but nobody seems to know for sure.… Read more

The Sansui Corrosive Glue Problem

While I am restoring this lovely AU-717 amplifier, I felt it was worth discussing the infamous Sansui corrosive glue problem.

Most equipment manufactured by Sansui, and others, during a certain period in the 70’s and 80’s will be affected by this nasty, corrosive compound. Its called polychloroprene and it literally eats through components like an acid.… Read more