Welcome; Introduction; Main Features; Patented Class Td Amplifier And Regulated Switch Mode Power Supply (R.smps) - Lab.gruppen FP14000 Operation Manual

4 WELCOME

4.1 Introduction

Thank you for choosing Lab.gruppen FP+ Series
power amplifiers for your sound reinforcement sys-
tem. We are confident that you will be pleased with
the performance, configuration flexibility, reliability,
and long-term durability offered by the FP+ Series
products.
This manual provides a comprehensive guide to the
features and functionality of FP+ Series amplifiers.
Please read through it to become fully acquainted
with the many configuration options and multiple
layers of protection circuitry. To facilitate timely
installation and use of this FP+ Series product, we
have included a Quick Guide Overview (section 6).
This brief summary, in conjunction with Installation
(section 5), contains the basic information needed
to safely install the amplifier and place it in service.
However, we highly recommend reading through this
manual in its entirety, beginning with Main Features
and Technologies and continuing through Operation
and Performance. As you become thoroughly familiar
with all aspects of operation, you may learn of features
or options that will affect your choices on amplifier
modes or loudspeaker system configuration.
The Lab.gruppen FP+ Series builds on the foundation
of the road-tested fP Series, with the same sonic
signature – powerful, tight bass and transparent
high frequency response. In addition, the FP+ Series
amplifiers establish new benchmarks for extremely
high power and channel density, and also offer the
benefits of remote computer monitoring and control
via the NomadLink network.

4.2 Main features

The FP+ Series incorporates a number of sophisti-
cated technologies – many of them proprietary to
Lab.gruppen – to ensure the best possible per-
formance and many years of reliable operation.
Familiarizing yourself with these technologies will
prove invaluable in setting up and optimizing your
loudspeaker system.
6 FP+ Series Operation Manual
4.2.1 Patented Class Td amplifier and
Regulated Switch Mode Power Supply
(R.SMPS)
Lab.gruppen's patented Class TD technology
combines the exceptional efficiency of a Class D
amplifier with the high sonic quality associated with
Class B designs. Class TD also incorporates the same
basic concepts behind Class H designs, but here they
are refined and pushed to a higher level to achieve
greater efficiency.
The Class TD output sections work in concert with
Lab.gruppen's unique, Regulated Switch Mode
Power Supply (R.SMPS) to create a superior overall
power amplifier topology. R.SMPS ensures stable,
full output power over an extremely wide range of
mains voltage levels. Sagging or fluctuating mains
voltage will not affect the power output delivered to
the loudspeakers.

4.2.2 Amplifier gain

For greater flexibility in system integration, FP+ Series
amplifiers allow gain adjustment from +23 dB to +44
dB in 3 dB steps. This feature accommodates any
combination of input device and loudspeaker type.
For example, if the input signal is weak, the gain can
be boosted to maintain maximum power output while
avoiding a poor signal-to-noise ratio. This gain adjust-
ment feature makes it easier to achieve an optimal
balance between headroom and noise floor.

4.2.3 Voltage Peak Limiter (VPL)

The Voltage Peak Limiter (VPL) feature allows
user adjustments that determine maximum volt-
age output, thus matching the amplifier to the
connected speaker load. Regardless of load impe-
dance, the VPL feature can be set to ensure that
neither temperature nor current limitations are
exceeded before reaching the desired voltage
threshold.
4.2.4 Protection and performance
optimization
Appropriate and reliable power amplification is vital to
any audio system. Inadequate or faulty power amplifi-
cation could cause damage to the loudspeakers, or in
some cases to the power amplifiers themselves. To
prevent any damage or costly service interruptions,
FP+ Series amplifiers offer advanced features to
protect both internal circuits and any connected loads.
These features even protect the mains fuse that, in
extreme cases, could be overloaded.