Crown Sst Modules - Crown CE 4000 Reference Manual

Typical non-switching power supplies require large, heavy
transformers in order to produce the required power at the out-
put stage. These transformers must be large to absorb the
substantial waste that occurs when operating at 50 to 60 Hz
(standard AC supplied by the power company).
By contrast, switching power supplies can operate with a much
smaller (and lighter) transformer because they first convert the
AC up to a much higher frequency, thereby reducing waste.
However, in both non-switching and conventional switching
designs, phase differences occur within the power supply due
to the inductance of the transformer. This phase difference pre-
vents much of the available power from the AC mains from
making its way to the load.
PFC, however, compensates for phase differences in the
power supply, allowing more true power to be transferred to
the amplifier. The result is more power with less waste than any
other conventional switching or non-switching design.
As an added benefit, PFC also allows the amp to be connected
to any common AC line voltage, without converting the power
supply. This means that whether you're running one or two
amps on a household circuit or several amps on a power distro,
your CE 4000 amplifiier is ready—right out of the box.

Crown SST Modules

Crown's optional SST (System Solution Topologies) modules
were specially designed to improve the fidelity and versatility
of your audio system. They feature a variety of professional
signal routing and filtering capabilities, with active crossovers
that allow the audio signal to be split and sent to auxiliary am-
plifiers. Your amplifier may have come with an SST module
already factory-installed, or your choice of SST modules can
be easily added to the amplifier by any authorized Crown Ser-
vice Center.
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CE 4000 The amp with an Attitude!
Reference Manual
CE 4000 The amp with an Attitude!
Why Biamped?
When you use one of Crown's SST crossover modules to split the power
drive to your loudspeaker components, you gain a wide range of advan-
tages, including:
1. Increased gain because the insertion loss of passive crossover net-
works is eliminated.
2. Consistent power bandwidth: power bandwidth is changed in multi-
way passive systems if transducers change impedance or vaporize
(blow up).
3. Levels can be matched more accurately to the components.
4. Quicker troubleshooting.
5. Improved dynamic range.
6. Better protection of components due to steep 24-dB/octave filters.
For information on wiring and configuration of amplifiers
equipped with an optional Crown SST crossover module,
please refer to the SST Crossover Reference Manual included
in your literature package.
Refer to the following descriptions for an overview of available
Crown SST crossover modules.
SST-MX Crossover
The SST-MX crossover module features 24-dB/octave Linkwitz-
Riley tuned filters and stereo sub-bass outputs for biamp op-
eration of subs. See Figure 5.1 for SST-MX block diagram.
Features of the SST-MX crossover include:
• Stereo biamp.
• 100-Hz fixed crossover
• 24-dB/octave Linkwitz-Riley tuned filters.
Reference Manual Page 39