Preamplifier 255 + Amplifier F10B
 
They have been purchased used by acquaintances and reliable people through the Italian distributor.
The main speakers I used on these electronics were the Zellaton Legacy and the Raidho D1.1.
The power amp despite only 100 watts on 8 hom has a great driving capacity with great refinement.
 
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!)
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