This new amplifier forms part of the next generation EVOLUTION 50 range of products. Housed in a slim case with engraved front panel and solid control
knobs, it’s finished in either black or silver brushed aluminium. An
ingenious new push button design has been developed for it, offering
excellent tactile feel and backlit optical indication of usable
functions for optimum user-friendliness.

This is Creek’s first product to feature an OLED (Organic Light Emitting Diode)
display. This white on black display provides higher clarity and
resolution than a normal display. Brightness levels can be changed or
the display made to turn off when not required, via the menu system.

At the heart of any good amplifier lies a good power supply; The EVOLUTION 50A
uses a 200 Watt toroidal mains transformer with separate windings for
high and low current analogue and digital circuitry. This solution
produces a good power to weight ratio and low magnetic interference.
Creek’s policy of paralleling several low impedance capacitors to create
an ultra-high specification capacitor to smooth the DC also helps to
produce a very powerful and accurate sound from such a relatively small
amplifier.

Creek’s Senior Engineer – David Gamble – has much experience in the
audio industry. He has developed a completely new bi-polar transistor
power amplifier circuit especially for the EVOLUTION 50A
with very high open-loop gain and low distortion. Featuring a pair of
Sanken 15Amp power transistors, with built-in thermal compensation for
rapid bias tracking performance, the Power Amplifier circuit has very
low output impedance and can produce high output current. This
combination will provide exceptional speed and control over most
loudspeakers.

David also developed a completely new analogue Pre-amp circuit,
providing high levels of flexibility and control, via unbalanced or
balanced inputs. It has multiple input options, switched electronically
or via gold contact relays, plus electronic Volume, Balance and Tone
controls. For Vinyl fans, a Sequel Phono pre-amp can be plugged-in,
substituting Line Input 1 for Phono. In addition, there is another input
available, should the user want to fit a Tuner module. The computer
control will sense this and respond accordingly.

Excellent measured and sonic performance has been achieved with this
analogue integrated amp, but when using digital input signals via the
matching EVOLUTION 50CD, the analogue pre-amp can be bypassed
completely. The EVOLUTION 50CD has a very high-end volume control in the
digital domain and ‘Class-A’ balanced audio outputs. Connecting the
output directly to the "Power amp direct" inputs elevates the
performance to an even higher level.