Creek Audio Evolution 50A Integrated Amplifier EVO50A (Display Model)

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  • $995.00

  • $1,195.00

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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.

PHONO AND TUNER ADD-ON OPTIONS AVAILABLE

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 50D CD/DAC/Pre-amp, the analogue pre-amp can be bypassed completely. The EVOLUTION 50D CD/DAC/Pre-amp 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

Creek Audio no longer makes a separate EVOLUTION Tuner. So, for die-hard analogue tuner fans, Creek has employed the services of ‘John Westlake and Dominik Peklo of Lakewest Audio’ to develop the AMBIT AM/FM Tuner Module. The 55 x 35mm AMBIT module can be fitted inside the amplifier, with its antenna sockets mounted on the rear panel. When fitted, it automatically turns the amp into a Receiver, suitable for every region of the world. The same tuner is fitted to the EVOLUTION 50D as standard, so it is an option only for those who want a Tuner but do not intend to use the EVOLUTION 50D.

A stylish new system remote handset has been developed to control all the functions of the EVOLUTION 50 range. The EVOLUTION 50 range also features an optional IR extender to enable the products to be hidden away, but still operable via remote control.

SEQUEL MK2

Creek Audio has always been a fan of the vinyl disc. For those consumers who have an interest in enjoying this exciting source of high quality music there are few amplifiers equipped to deal with this format directly.  It is not possible for a pick-up cartridge to connect directly to an amplifier without a Phono pre-amplifier in-between.  A Phono pre-amplifier is designed to boost the signal level and change the frequency response in accordance with the RIAA standard.

All Creek integrated amplifiers built, from 1993, have been designed to accept a plug-in Phono module to enable vinyl disc reproduction.

The latest Creek plug-in Phono module is called Sequel mk2 and is designed to match a wide-range of MM and MC cartridges. It can be fitted to the latest integrated amps from Creek, and many of the earlier ones.  See the list below for details.

The module must be fitted, inside the amp in a slot that will change the Auxiliary Line input into a Phono input. Either the supplying dealer, or the user, must fit the Phono pre-amp before the amp can be used to replay vinyl discs.

The circuit cannot be switched for MM or MC use, so the correct module must be chosen to match the cartridge fitted on the turntable. The EVOLUTIONamp’s display will automatically show Phono, when the amp is fitted with the Plug-in module and selected for that input.

SEQUEL 40 MK2

The Sequel 40 mk2 MM Phono pre-amp is the device specifically suited for most types of Moving Magnet cartridges, with an output between 3.5 to 5mV and a matching impedance of 47k Ohms.

The Sequel 40 mk2 is not suitable for high output MC cartridges, which require higher gain and 47k Ohm matching. The Sequel 48 mk2 is made for this purpose.

The Sequel mk2 has two gain stages using low-noise op-amps. RIAA correction is performed both active and passively. The first gain stage matches the MM cartridge’s 47k Ohms impedance and adds gain, without changing the frequency response.

The first stage of RIAA de-emphasis is performed passively between the two gain stages.

The second gain stage boosts the level further and uses active filtering in its feedback for the RIAA de-emphasis, For improved RIAA accuracy and improved sonic quality, the Sequel mk2 is made with E96 1 % tolerance metal film resistors and 1% tolerance polypropylene WIMA capacitors.

To eliminate coupling capacitors that can negatively affect the sound, a DC servo circuit is used to block DC from input to output and roll-off low frequencies sensibly below 10Hz. There is no rumble filter in this design.

The Sequel mk2 is powered by a dedicated voltage from the integrated amplifier, via its PCB connection pins.  Locally, it uses a low noise voltage regulators, whose function is to stabilise the voltage and filter noise from the main power supply.  The Sequel mk2 has optimal overload margin for a given gain.

Specification

  • Gain x100 (40 dB)
  • Frequency Response 
    10 Hz to 20 kHz +/- 0.5 dB
  • Signal to Noise Ratio – 80 dB
  • Total Harmonic Distortion < 0.03%
  • R1AA deviation +/- 0.5%
  • Output 400 mV from 4mV input
  • Input Sensitivity / Impedance/ Capacitance – 4mV / 47K Ohm / 220pF
  • Overload Margin 22 dB
  • Suitable for medium to high output MM cartridges in the range of 3.5mV – 5mV output

SEQUEL 48 MK2

The Sequel 48 mk2 MM Phono pre-amp is the device specifically suited for high output Moving Coil cartridges, with an output between 0.9 to 2mV and a matching impedance of 47k Ohms.

The Sequel 48mk2 is not suitable for medium to low output MC cartridges, which require higher gain and a lower input impedance.

The Sequel mk2 has two gain stages using low-noise op-amps. RIAA correction is performed both active and passively. The first gain stage matches the MM cartridge’s 47k Ohms impedance and adds gain, without changing the frequency response.

The first stage of RIAA de-emphasis is performed passively between the two gain stages. The mk2 circuit uses a low impedance filter circuit for improved noise performance.

The second gain stage boosts the level further and uses active filtering in its feedback for the RIAA de-emphasis, For improved RIAA accuracy and improved sonic quality, the Sequel mk2 is made with E96 1 % tolerance metal film resistors and 1% tolerance polypropylene WIMA capacitors.

To eliminate coupling capacitors that can negatively affect the sound, a DC servo circuit is used to block DC from input to output and roll-off low frequencies sensibly below 10Hz. There is no rumble filter in this design.

The Sequel mk2 is powered by a dedicated voltage from the integrated amplifier, via its PCB connection pins.  Locally, it uses a low noise voltage regulators, whose function is to stabilise the voltage and filter noise from the main power supply.  The Sequel mk2 has optimal overload margin for a given gain.

Specification

  • Gain x250 (48 dB)
  • Frequency Response 
    10 Hz to 20 kHz +/- 0.5 dB
  • Signal to Noise Ratio – 72 dB
  • Total Harmonic Distortion < 0.03%
  • R1AA deviation +/- 0.5%
  • Output 400 mV from 1.6mV input
  • Input Sensitivity / Impedance/ Capacitance – 1.6mV / 47K Ohm / 220pF
  • Overload Margin 22 dB
  • Suitable for high output MC or low output MM cartridges in the range of 0.9mV -2mV output

SEQUEL 54 MK2

The Sequel 54 mk2 MC Phono pre-amp is the device specifically suited for medium output Moving Coil cartridges, with an output between 0.5 to 1mV and a matching impedance of <120 Ohms.

The Sequel 54mk2 is not suitable for high output MC cartridges, which require lower gain and a higher input impedance.

The Sequel mk2 has two gain stages using low-noise op-amps. RIAA correction is performed both active and passively. The first gain stage matches the MC cartridge’s <120 Ohms impedance and adds gain, without changing the frequency response.

The first stage of RIAA de-emphasis is performed passively between the two gain stages. The mk2 circuit uses a low impedance filter circuit for improved noise performance.

The second gain stage boosts the level further and uses active filtering in its feedback for the RIAA de-emphasis, For improved RIAA accuracy and improved sonic quality, the Sequel mk2 is made with E96 1 % tolerance metal film resistors and 1% tolerance polypropylene WIMA capacitors.

To eliminate coupling capacitors that can negatively affect the sound, a DC servo circuit is used to block DC from input to output and roll-off low frequencies sensibly below 10Hz. There is no rumble filter in this design.

The Sequel mk2 is powered by a dedicated voltage from the integrated amplifier, via its PCB connection pins.  Locally, it uses a low noise voltage regulators, whose function is to stabilise the voltage and filter noise from the main power supply.  The Sequel mk2 has optimal overload margin for a given gain.

Specification

  • Gain x500 (54dB)
  • Frequency Response 
    10 Hz to 20 kHz +/- 0.5 dB
  • Signal to Noise Ratio – 73 dB
  • Total Harmonic Distortion MC < 0.03%
  • R1AA deviation +/- 0.5%
  • Output level 400 mV from 0.8mV input
  • Input Sensitivity / Impedance/ Capacitance – 0.8mV / 120 Ohm / 1000 pF
  • Overload Margin MM 22 dB
  • Suitable for medium output cartridges in the range of 0.5mV – 1mV output

- Please note: The Sequel Phono pre-amp cannot be fitted to the original Destiny 1 integrated amp, because the connections on the pre-amp 1 are unique and it had the special Destiny Phono pre-amp made for it only.

The Sequel Phono modules can also be used to enable vinyl input on current and older Creek amplifiers including the following:

Destiny 2 integrated amp
Evolution 2 integrated amp
Evolution 5350 integrated amp

Classic 5350SE Integrated amp
5350SE, 5350R and 5350 Integrated amps
5250,5250R and 5250SE integrated amps
4330 and 4330SE Integrated amps, but not mk2 versions.
4240 and 4240SE Integrated amps
P42 Pre-amp

A50i, A50iR, 4330mk2 and 4330SE mk2 can only use the single supply EVOLUTION MM and MC Phono, which is now out of production.

AMBIT TUNER

FM/AM RDS Tuner Module

For more than 30 years Creek Audio has established itself as an expert in the field of radio.  Historically, Mike Creek has developed and manufactured radio products since the early 70s. Mike’s father also made radio products, so it’s in his DNA.  The latest DAB radios use bit-compression to turn all radio stations into the equivalent of very poor quality MP3 players.  Needless to say, this is the main reason for Creek not offering a DAB radio in its Hi-Fi range. In any case, you don’t need to buy a DAB radio when all the digital and analogue stations are broadcast over the internet now. Even analogue stations, broadcast over the internet, are digitised and compressed, so the best way to listen is still via a traditional radio or tuner.

The latest tuner in Creek’s EVOLUTION 50 range is the AMBIT FM/AM Tuner module, suitable  for adding to the EVOLUTION 50A or the forth coming EVOLUTION 100A amplifier.  Plugging this tuner into the back panel of the amplifier upgrades the amp into a Receiver. Its Plug and Play nature also allows it to update the amp’s software to the latest revision automatically.  Once the tuner is installed and the amp is switched-on, the display will show the amp having an extra input – A Tuner input, in fact. However, it will look to the user like a stand-alone tuner in the OLED display window.

Once installed, the four left hand buttons on the front panel, together with the left hand control knob and or remote control handset, will offer all the radio function controls.

detailed technical information

TECHNICAL SPECIFICATION

FM FREQUENCY RANGE

76 – 108 MHz

AM FREQUENCY RANGE

520 – 1710 kHz MW

TUNING INCREMENTS

FM: 50, 100 and 200 kHz
AM:  9 kHz or 10 kHz

PRE-SET STATIONS

For FM/AM >100

STATION PROGRAMMING

Manual or Automatic

   

FM SENSITIVITY

-3.5 dBuV 26dB audio & max RF gain

IMAGE REJECTION

>70dB

ADJACENT CHANNEL REJECTION

>65dB

ALTERNATE CHANNEL REJECTION

>70dB

FREQUENCY RESPONSE (FM ONLY)

30 Hz- 16 kHz -1dB

TOTAL HARMONIC DISTORTION

<0.05%

STEREO SEPARATION (FM ONLY)

>40dB

SIGNAL TO NOISE (FM ONLY)

>70dB (Full limiting) Stereo

The AMBIT tuner receives the entire FM and AM frequency band and digitises it with two high quality ADCs.  It then manages the signal using a Digital Signal processor and even separates the left and right channel information in FM.  After this, using its own high quality DAC, it returns the digital signal to Audio, to be amplified by the EVOLUTION 50A.

The result is simply brilliant.  FM signals have textbook operation, with none of the usual problems associated with analogue tuner performance.  RDS stations will show their name and other information.  AM performance is excellent also and can provide excellent performance just from the loop antenna provided, if there is a good indoor signal.

FM radio performance is limited only by the quality of the signal and of course the antenna used. Choose an external antenna for the best results.

Listen to your favourite stations like you have never heard them before.

Technical Data:

  • POWER OUTPUT INTO 8 OHMS >55 Watts
  • POWER OUTPUT INTO 4 OHMS >85 Watts
  • MAX CURRENT >26 Amps
  • THD < 0.005% 20Hz – 20Khz
  • FREQUENCY RESPONSE 10Hz – 100KHz +/- 2dB (Unbalanced)
  • FREQUENCY RESPONSE 10Hz – 50KHz +/- 2dB (Balanced)
  • SLEW RATE > 30 V per µS
  • GAIN 33.3dB (x46) (Unbalanced)
  • GAIN 27.0dB (x22.5) (Balanced)
  • INPUT SENSITIVITY 410mV
  • MAX INPUT VOLTAGE 5.4V and 10.8V r.m.s.
  • SEPARATION -80dB
  • SNR >102dB
  • OUTPUT IMPEDANCE <0.1 Ohms @ 1Khz
  • OUTPUTS 1 Pair
  • HEADPHONE OUTPUT Yes
  • SPEAKER SELECTOR No
  • IR INPUT Powered output for IR repeater
  • OPERATING VOLTAGES 110V/230V Switchable
  • CONSUMPTION (AT IDLE) 20 Watts
  • CONSUMPTION (AT FULL POWER) 350 Watts
  • WEIGHT 7.5Kgs
  • DIMENSIONS 430x60x280mm W/D/H