...to be able to announce the "MK-II" version of the FM 711.
The original FM 711 was exclusively made for Japanese music aficionados. In 2008 the exclusivity commitment has been completed and as the FM 711 is such an outstanding amplifier it was decided to continue crafting this marvel. Included in the new MKII version are all recent developments and ameliorations developed for the FM 1811, FM 115 and the
The more massive power supply of the MKII is uses high speed dual rectifiers of high current capacity.
Sealed long-life level controls use a conductive plastic track rather than the usual carbon or cermet track. In addition to much longer life expectancy this provides better resolution and guarantees no noise.
The new HR modules are used on the inputs. They help to achieve an astounding 100dB (!!!) of rejection of Common Mode signals (such as interference, hum, noise etc. which must be cancelled out before the amplification stages). They rend the FM 711-MKII immune against interference. This CMRR rejection is achieved not with cheap op amps but with individually fine-tuned discrete Class A circuits guaranteeing the ultimate resolution FM ACOUSTICS products are esteemed for.
Light bulb changes are a thing of the past.
FM ACOUSTICS' new frontpanel display provides a more even light distribution and uses high reliability LED's instead of incandescent light bulbs.
These LED's have a theoretical lifetime in excess of 100'000 hours (we could not really test them for that long so let's hope the specifications are realistic...).
Another small detail: left the new ultra-bright bulb now used for the mains power switch illumination. The cost is 3000% higher than the good old "long life" light bulb on the right (which needs replacement after a while - depending on quality of mains power). The new lamp uses dozens of LED's encased in its housing achieving higher brightness and much longer lifetime.
It is compatible and can also be used in the MKI version of the amplifier upon request (although not free of charge - for the above reason).
To avoid negative influence from spurious resonance and guarantee positive coupling the 711-MKII employs FM ACOUSTICS unique resonance-eliminator supports. These isolate the unit from potential resonances making the unit immune to parasitic resonances.
Minimum Power Output:
520 W peak into 8 Ohm
1000 W peak into 4 Ohm
1600 W peak into 2 Ohm
260 W RMS into 8 Ohm
500 W RMS into 4 Ohm
800 W RMS into 2 Ohm
Max. Output Voltage: 140 V pp.
Max. Output Current:
Unlimited repetitive peak output current. More than 35 A continuous per channel. No output or DC fuses, absolutely no form of current-, voltage- or any other kind of limiting.
Distortion: 0,005% THD
Bandwidth including Input Filter:
Less than 1 Hz to 60 kHz;
if required, internally setable to any frequency between 1 kHz and 60 kHz (Low-Pass) and
1 Hz to 1 kHz (High-Pass).
Risetime at Full Power: 3 us
Hum and Noise:
Below full power typically -110dB
better than -100 dB
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 input of the FM 711.
1,6 V RMS for full output
At all level settings from balanced and unbalanced sources: 40 kOhm
Input Stage Common Mode Rejection:
100 dB typically, better than 90 dB at 50 Hz, even better at other frequencies.
No minimum impedance. The amplifier is designed for 1 Ohm to 10'000 Ohm systems. It can drive any speaker impedance (even below 1 Ohm) with dynamic (music) signals without any limiting, compression or other negative effects on the audio signal. Despite this, the amplifier is fully protected against short circuits, open circuits and all other adverse conditions via a unique on board computer that continuously surveys all important parameters.