Products   : :   Line Stages / Preamplifiers   : :   Resolution Series FM 255

    The FM 255 was manufactured continuously for 11 years and has been the most successful of all preamplifiers/line stages thanks to its superb price/performance ratio.

    The new MKII is a refinement of the original version with some additional features and fine ameliorations. Below the description of the earlier FM 255 which made audio history





  • Proprietary enhanced Class A circuitry

  • CMRR of 95 dB (= 100-1000 times better than other so-called "balanced" equipment)

  • Featuring two true balanced inputs and three unbalanced inputs

  • Discrete Class A tape send and return guarantees superior recordings or connection to auxiliary equipment.

  • Unparalleled freedom from noise & interference

  • Tremendous headroom and reserves in input signal handling capability (+21dBv!)
   Click on the picture to enlarge 


FM 155 (top)
and the true balanced FM 255 (bottom)

  • Identical balanced input paths

  • All input & output impedances are perfectly linear over full frequency range

  • Sensors in the true balanced outputs automatically optimise performance

  • Fully discrete circuitry using special curve-tracer analysed and listening-selected semi-conductors

  • Outputs drive any load and long cables with perfect reproduction and stability


  • Precision balance and output level controls are used; no stepped attenuators, relay-type or inferior sounding optical or digital volume controls

  • Transformer utilises a special dual shield that prevents stray fields.

  • Extremely low impedance built-in power supply

  • Hand-selected and individually matched components of DIN, IEC & MIL standards

  • Totally modular concept guarantees that the FM 255 does not become obsolete

  • The Resolution Series ® 255 is THE ultimate precision preamplifier center for use with true-balanced, pseudo- balanced and unbalanced sources
   
© 2002 FM ACOUSTICS LTD.  Last update of this site June 7, 2008