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Introduction
Failure of the NSX active speakers is a common fault, especially for the early build years. The modules are class-D switching amplifiers with a MOS-FET driver bridge for low impedance (2 Ω) speakers. The amplifier can be divided into these main sections:

• Output drivers (MOS-FET transistors) and Filter (coils)
  Transistors used are from either STMicroelectronics (ST) or International Rectifiers (I▽R) with the BOSE-internal part number 137110
  One

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