Synthesis A50 Taurus Integrated Valve Amplifier

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A50 Taurus

The Action series from Synthesis is a new range of stereo tube amplifiers with DAC's on board, guaranteeing exceptional sonic performance from any digital source. Made with the finest materials & advanced technology, this series is a sophisticated blend of research & experience. Designed without compromise for a rich sound & faithful music reproduction.

The A50Taurus provides a minimum of 100 watts (50W per channel), power output from 4, KT88/6550's in Ultra-Linear (UL) - push/pull operation.  The A50Taurus like it's bigger brother also features a newly designed custom output transformer resulting in a rich sound stage but with an authority that belies its 50W.

- USB & S/PDIF input: For the first time we include an onboard 24Bit 192KHz Wolfson DAC for a extraordinary listening experience.  

- DC Powered tube heater: All tubes, except KT88/6550, have DC stabilised heater circuits to reduce hum noise to a near in-audible minimum.  

- Output transformer: The Output transformer uses a Hi-Grade Iron-Silicon for superb frequency reproduction & width. With this newly designed custom output transformer unique to the A50Taurus we are able to achieving a highly delicate & precise sound reproduction faithful to the original recording.  

- Mechanical chassis construction: The power supply & output transformers are held by an extremely rigid “H” structure that keeps the unit free from unwanted vibrations which further helps reduce unwanted noise to the tubes.  

- Remote control: Featuring a superb CNC machined case it has a soft button design, perfectly matching the aesthetics for the “ACTION” series.  

- Feet: Four CNC machined aluminium feet with an insert of natural rubber. The depth & form of these rubber feet has been calculated to minimise vibrations of the amplifier in isolation from its surroundings.  

- Binding posts: Gold plated professional binding posts for a continued oxidisation free connection further improve sound refinement.

- Sockets: Gold plated ceramic sockets for a continued oxidisation free connection further improve sound refinement.  

- Components 
Components for the A50Taurus have been selected with great care throughout. Only the best available components are considered & all must undergo an exhaustive analysis of their sonic influence prior to final selection.  

- Selected tubes: All tubes used are selected after 2 stage warm up. A fully computer monitored machine controls the process & at the end of this, selects the perfect tubes which are then matched for a perfect balance.

Technical specifications

  • Power stage (1 ch.): 2 X KT88
  • Input stage/driver (1 ch.): ECC83/12AX7, driver (1 ch.): ECC99/12bh7
  • Frequency response: 20Hz to 20KHz +- 0.5dB
  • Input impedance: 50Kohm
  • Input sensitivity: 200mV / 50W
  • Output impedance: 4-8 ohm
  • Power stage config.: Parallel Push-Pull Ultralinear 43% tap
  • Power output: 50W RMS into 4/8 ohm each channel AB1 Class
  • Signal/Noise ratio: >90dB, A weighted
  • Inputs: 5 Line (CDP,DVD,RADIO,SAT,USB,DGT)
  • Outputs: Pre Output (Volume controlled)
  • Finish: Steel
  • Power consumption: 350W
  • Dimensions: (w,d,h) 420x450x260mm
  • Weight: 35.0 Kg
Digital Stage
  • Compatible format: PCM Stereo 32-192KHz
  • Input: USB (PC-Mac) S/PDIF
  • Up sampling: 192KHz / 24Bit
  • D/A converter: Dual Mono 2xWolfson WM8740
  • Output Stage: NJM2114L Op-Amp
  • Analogue output: 1V RMS
  • Signal/Noise ratio: >90dB, A weighted