Mosfet Devices; Nomad - Rockford Fosgate punch 40X2 Operating & Installation

MOSFET Devices

Rockford Fosgate is one of the few manufacturers in the sound
community to utilize MOSFET devices in both the power supply and
the output stages . MOSFET (Metal Oxide Semiconductor Field Effect
Transistor) devices offer several important inherent advantages over
the 30 year old technology of bi-polar design. These advantages
include: thermal stability, switching speed, ultra low output imped-
ance and wider bandwidth linearity. In addition, MOSFETs operate
very similarly to vacuum tubes in which they are more linear than bi-
polar transistors. However, MOSFETs can deliver the midrange clarity
without the limitations of transient response and high frequency
phase shifting normally associated with tube operation.
THE RESULT: Operational characteristics similar to vacuum tubes
without the performance limitations of tube design.

NOMAD

(NOn-Multiplying Advanced Decision)
The Punch and Power amplifiers use an analog computer process to
maximize safe output power under all operating conditions. The
innovative NOMAD (NOn-Multiplying Advanced Decision) system
is the most sophisticated version of this technique ever used, bringing
previously unavailable levels of accuracy, stability, temperature
immunity and reliability to this critical process. NOMAD makes
advanced decisions based on device voltages to precisely control the
awesome levels of current available in the output MOSFETs to safe
values – but only when absolutely needed.
THE RESULT: Extremely fast protection system that always protects
the amplifier and never degrades the sound.
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