Rockford Fosgate 400x4 Stereo Amplifier User Manual


 
RTP (Real Time Protection)
NOMAD (NOn-Multiplying Advanced Decision)
The Punch and Power amplifiers use an
analog computer process
to
maximize safe output power under all operating conditions. Rock-
ford Fosgate pioneered and developed
RTP
(Real Time Protection),
a crucial element in the performance edge of our amplifiers. 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, tem-
perature 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.
MOSFET Devices
Rockford Fosgate is one of the few manufacturers in the audio
industry 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 advan-
tages over the 30 year old technology of bi-polar design. These
advantages include: thermal stability, switching speed, ultra low
output impedance and wider bandwidth linearity. In addition,
MOSFETs operate very similar to vacuum tubes in which they are
more linear than bipolar 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 designs.
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