• And here it is:
  
  The fascinating new FM 1811 is the culmination of FM ACOUSTICS efforts in 35 years of dedicated R&D. Not many words are needed to introduce the FM 1811:
  it is the ultimate solution to highest accuracy in music reproduction.
  
  The "cost no object" approach allows the
  FM 1811 to attain an unmatched standard of excellence.
  Based on the famous Resolution Series ® design principles it eclipses any amplifier ever made. The new design concept combines newly available components and dozens of detailed circuit refinements.
  Some of the new features:
  
  
   
• New symmetrical input stage provides the    highest symmetry and best balancing ever 
   
• New ultra high linearity driver stages
   
• Newly developed dual chassis eliminates mechanical resonances and reduces mechanical noise to inaudible levels
   
• Includes FM ACOUSTICS unique resonance isolators
   
• The most dramatic output stages ever created provide absolute linearity even at highest currents
   
• Two new astoundingly quiet fans using special control circuitry follow the dynamic envelope of the amplifier's performance and its thermal characteristics. The resulting silence contributes to the FM 1811's dramatic dynamic rendering.
   
• Many custom-made components of singular standard and quality
   
• Phenomenal new layered and frozen transformer - hand-made in Switzerland - uses unique specially treated ultra high-efficiency steel.
   
• Ultra high efficiency cooling with thermal envelope optimization
   
• Capacitors of ultimate quality made in Switzerland to proprietary specifications
   

Evolution or breakthrough?
The combination of these results in the
ultimate Resolution Series ® Amplifier
 

Not a power station;
the highest resolution power supply.

The heart of the matter...

• A FEW SPECIFICATIONS
  
  Minimum Power Output:
  Per channel, both channels operating with continuous music or continuously repetitive toneburst:
  1000 W^peak into 8 Ohms
  1800 W^peak into 4 Ohms
  3200 W^peak into 2 Ohms
  
  500 W^RMS into 8 Ohms
  900 W^RMS into 4 Ohms
  1600 W^RMS into 2 Ohms
  
  (Just for comparisons sake: the impulse power is more than 4500W per channel).
  
  
  Max. Output Voltage: 180 V pp.
  
  
  Max. Output Current:
  Absolutely unlimited peak current (over 550A). More than 80A continuous per channel allows the FM 1811 to drive any known load without any negative influence on the audio signal. No fuses, absolutely no form of current, voltage or any other kind of limiting.
  
  
  Distortion:
  Average distortion: 0,005% THD
  
  
  Gain: 30dB
  
  
  Risetime at Full Power -3dB: 3 us
  
  
  Hum and Noise: (20Hz-20kHz).
  Below full power typically: -115 dB
  Min. unweighted: better than -100 dB
  
  
  Input:
  Input: Proprietary, electronically balanced, discrete enhanced class A circuitry, floating ground, non-inverting or inverting mode. Optimal performance with either balanced or unbalanced (single-ended) sources. Unbalanced sources are automatically balanced right at the inputs of the FM 1811.
  
  
  Input Stage Common Mode Rejection:
  105 dB typically, better than 95 dB at 50Hz even better at other frequencies.
  
  
  Maximum Input Level:
  +20 dBm (7,75 VRMS)
  
  
  Load Impedance: No minimum impedance. Can drive systems with minimum impedance of below 1 Ohm to above 10’000 Ohm. Can drive any speaker impedance - dynamic, electrostatic, ribbon, planar etc. - without any limiting, compression or other negative effects on the audio signal. Despite this, the amplifier is fully protected against short circuits and all other adverse conditions via a unique onboard system that continuously surveys all important parameters.
   

Protection:
Unique protection systems proprietary to FM ACOUSTICS protect against adverse conditions such as short circuit, open circuit, HF Oscillation, RF interference, +DC and -DC offset, fan activity, temperature, blocked or dirty fan filters, damage to the protection system itself, etc.


Chassis Resonance Damping:
New dual chassis design effectively isolates sensitive components from induced resonances. Mechanical resonance damping on panels is employed. The whole chassis including cover, transformer mounting, transformer leaves, side panels, capacitor mounting etc. use anti-resonance technology.


Average Life Expectancy:
At 25oC ambient temperature, medium power, 10h/day, 365 days/year: 38 years.


Power Consumption:
At idle: 200 W^RMS
At 30% power: 1400 W^RMS
At full power: 3600 W^RMS

With dynamic signals: 10000 W^peak repetitive


Mains Supply Requirement:
No mains voltage drop when supplying:
25A cont. 100A peak at 110V - 120V
12.5A cont. 50 A peak at 110V - 120V


Burn-in Time at Factory:
Minimum 100 hours (500 thermal cycles)


Vibration Test at Factory:
Minimum 60 minutes (50’000 vibration cycles)


Output Connectors
(on FORCELINES):
FORCEPLUG 200, ultra low-loss high-performance connectors.
Continuous current handling: 200A
Peak current handling: 1200A
FORCELINES type 3 required.


Spare Parts Availability:
Guaranteed available for a minimum of 10 years. Ex stock availability of 99% of all individual parts.


Weight: Only 45 kg net / 50 kg packed


Dimensions:
430 mm wide
260 mm high
550 mm deep