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The Evolution 5350 integrated amplifier has been designed to fill the
gap left by the Classic range, between the entry level Evolution 2 and
the top of the range Destiny. It has borrowed technology from both the
Evolution 2 and Classic 5350SE and is styled to match the EVOLUTION 2 CD
Player and EVOLUTION Tuner.
Creek Audio has developed a
completely new high current bi-polar power amplifier to enable it to
drive low impedance loudspeakers with modern dynamic music from high
resolution sources. This has required a radical approach to enable it to
be fitted into a slim-line case.
Each power amp is now built as a
module, using a high proportion of Surface-Mount components, on a double
sided PCB, bolted to a massive 18 fin heatsink. This means both channels
are identical and can be fitted and removed easily for servicing if
required. The power amp topology includes a cascoded differential
voltage amplifier and MOS-FET current drive stage feeding a double
Darlington output stage with four high-current bi-polar transistors to
produce a very powerful amplifier capable of driving the most demanding
of loads, with high resolution and accuracy. DC stability is maintained
by a servo amplifier that rejects DC and allows the amplifier to be
coupled directly without capacitors.
In a further development of
the Evolution 5350 integrated amplifier's pre-amplifier section, 5
inputs are selectable by high current gold plated relays and switchable
access to the power amp allows the Evolution 5350 to be driven directly
by the front channels of a 5.1 AV receiver. The standard Creek plug-in
Phono pre-amp is also featured. A high-grade PGA2320 digitally
controlled analogue volume control circuit together with OPA604 Op-Amps
are used to provide a pre-amp with higher overload margin and lower
distortion.
To enable 2 x 200 Watts into 4 Ohms to be produced
from a small case, Creek has developed a massive power supply using a
high grade 350 Watt toroidal mains transformer that powers left and
right power amp channels separately, plus pre-amp and digital circuits.
To keep the power amps operating safely, they are monitored by discrete
transistor circuitry to protect against over-current demand, short
circuits, over-temperature and DC offsets. Relays mute the input and
separate the loudspeaker outputs in case of faults.
The Evolution
5350 is operated from the front panel by rotary digital controls for
input selection and volume control plus push buttons for Tape and
Speaker selection, Mute and Power On/Off. The EVOLUTION 5350 can be
operated by the standard EVOLUTION remote control handset, which
operates EVO amplifiers and CD player.
Gold plated input and
output sockets have been chosen to provide a good connection and
appearance for a product at its price point. Loudspeakers are connected
by up to 2 sets of high current gold plated binding posts, with plastic
touch-proof covers. The amplifier also has a headphone socket; something
which is becoming an increasingly rare feature in modern amplifiers.
A large vacuum fluorescent display (VFD) on the front panel indicates
the state of the amplifier. Input selection, volume position and
loudspeaker connection is displayed through a blue filter. The
brightness level can be altered from the remote control handset.
Mains is supplied via a fused, 3 pin IEC chassis plug, mains voltage
selector and 2 pole high current switch on the front panel. A high
quality power cord is supplied with suitable mains plug for the country
of use.
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