The speaker uses convective radiation cooling; technicians should check the back plate for dust buildup that may cause thermal shutdown. 2. Input and Control Section

Whether you are repairing a blown channel from a heavy metal show or recapping a unit from a church install, having the correct schematics, component placement, and calibration steps transforms a frustrating mystery into a systematic repair.

Always use a 250V fuse with the correct amp rating as specified on the rear panel.