Welcome - the FM 1811-MKII is here - another calibre...
The fascinating FM 1811-MKII is the culmination of FM ACOUSTICS efforts in 50 years of the most dedicated R&D.
No need for many words: the Resolution Series® 1811-MKII delivers the ultimate in highest accuracy music reproduction.
Period.
The FM 1811-MKII is the standard of excellence.
Dozens of refinements of FM ACOUSTICS' unique circuits are combined with features like:
- New symmetrical input stage modules provide the highest symmetry and most
- Ultra high-linearity driver stages
- Dual chassis for resonance elimination
- The most dramatic output stages ever created provide absolute linearity even at ultra high voltage and current
- Silent operation contributes to the FM 1811-MKII's dramatic dynamic rendering..
- Highest efficiency cooling with thermal envelope optimization
- Multiple custom-made components of singular standard and quality
- Custom made capacitors to proprietary specifications guarantee ultimate performance and reliability
- Phenomenal hand-assembled, layered and frozen transformer uses unique specially-treated high efficiency steel and weighs only 21 kg (which is "light" for this power)
- includes unique "tuned anti-resonance" isolators
- Thermal envelope optimization reduces power consumption
- apart from all parts selection procedures, test and calibration of all pre-assemblies, every single unit undergoes multiple pre- and final tests - by three different engineers on every single
unit.
- Every single unit is crafted by hand to special order at FM ACOUSTICS facilities in Switzerland
intrinsic musicality
Of course, all characteristics that have made FM ACOUSTICS amplifier world renown - like singular discrete circuits, individually fine-tuned and hand calibrated FM ACOUSTICS enhanced class A
stages, use of Listening- and hand-selected semiconductors and many more proprietary solutions - are incorporated.
The Resolution SeriesÒ 1811-MKII delivers absolutely incredible realism and a "be there" experience that neither words nor technical terms can describe. Only a live demonstration will allow to
realize the magnitude of this unique precision amplifier.
The FM 1811-MKII drives any speaker to a performance level that could never have been imagined. To be able to fully deliver its promise the FM 1811-MKII requires a high-level, ultra low-impedance
mains supply to deliver its promise. A dedicated supply that can provide a minimum of 125A peak / 25A cont. at 120V (or 60A peak / 12.5A cont. at 230V) with absolute stability is
mandatory.
Some Specifications
Specifications are often misused, misunderstood or utilized only to sell a product instead of indicating its actual performance capabilities. “Typical” specifications do not tell much about the true value of a certain component. Only guaranteed minimum data - as specified for all FM ACOUSTICS products - together with carefully controlled listening tests will provide accurate and useful information. These distinctions must be observed when comparing to other specifications.
Minimum Power Output:
Per channel, both channels operating with continuous music or continuously repetitive toneburst:
1000 Wpeak into 8 Ohms
2000 Wpeak into 4 Ohms
3400 Wpeak into 2 Ohms
500 WRMS into 8 Ohms
1000 WRMS into 4 Ohms
1700 WRMS into 2 Ohms
(Just for comparisons' sake as other manufacturers use such
ratings: the repetitive impulse power of the FM 1811-MKII equals 4600W per channel).
Max. Output Voltage:
184 V pp.
Max. Output Current:
Absolutely unlimited peak current. More than 80 A continuous per channel allows the FM 1811-MKII to drive any known load with optimal accuracy.
No fuses, absolutely no form of current-, voltage- or any other kind of limiting are employed.
Distortion: inaudible
Gain: 30,1dB
Risetime at Full Power -3dB: 3 us
Hum and Noise: inaudible.
Below full power typically: -115 dB
Min. unweighted: > than -100 dB
Input:
Proprietary, electronically balanced, discrete enhanced class A circuitry, 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-MKII.
Interference Rejection:
(noise, hum, RF etc.): better than 95 dB
Maximum Input Level:
+20 dBm
Load Impedance:
No minimum impedance. Designed for below 1 Ohm to above 10’000 Ohm systems. Can drive any speaker impedance - dynamic, electrostatic, ribbon, planar etc.-
without any form of 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 on-board system that continuously surveys all important parameters.
Protection:
Proprietary protection systems safeguard against adverse conditions such as short circuit, open circuit, HF Oscillation, RF interference, +DC and -DC offset, parasitic frequencies,
overtemperature, damage to the protection system itself, etc.
Chassis Resonance Damping:
Dual chassis design effectively isolates sensitive electronic and mechanical components from potential induced resonances. Uses specific anti-resonance technology.
Average Life Expectancy:
At 25oC ambient temperature, medium power, 10h/day, 365 days/year: 40 years.
Power Consumption:
At idle: 200 WRMS
At 30% power: 1400 WRMS
At full power: 3600 WRMS
With dynamic signals:
10000 Wpeak repetitive
Mains Supply Requirement:
32A continuous, 130Ap at 110V - 120V
16A continuous, 65 Ap at 220V - 240V
Burn-in Time at Factory:
Minimum 100 hours (500 thermal cycles)
Vibration Test at Factory:
Minimum 60 minutes (50’000 vibration cycles)
Output Connectors:
FORCEPLUG 200, ultra low-loss high-performance connectors.
Current handling = 1200Ap
(soldered to FORCELINES). For the FM 1811-MKII type "FORCELINES 3" are required to guarantee ultimate performance.
Spare Parts Availability:
Guaranteed available for a minimum of 10 years. Ex stock availability of 99% of all individual parts.
Weight:
Only 47 kg net, 52 kg packed
Dimensions:
445 mm wide
275 mm high
530 mm deep