Resolution Series 266-MKII, 266-MKII "R" and 266-MKII "RC"

Success unequalled: the FM 266-MKII R true balanced Line Stage / Preamplifier
Success unequalled: the FM 266-MKII R true balanced Line Stage / Preamplifier


The new "R" and "RC" versions of the FM 266-MKII are redefining the absolute in line stage design. Shown first time in May at the Hifi Deluxe exhibition in Munich they caught the eyes of admirers.


The "R" version of the FM 266-MKII uses a beautiful remote control that is hand crafted out of selected wood. This remote is carefully crafted at our factory in Switzerland.  




FM 266-MKIIRC with the singular ARC circuits
The phenomenal Acoustic Resonance Correction circuits located on the front panel. A tremendous improvement in reproduction in any room is guaranteed.


The "RC" version of the FM 266-MKII includes this remote control and additionally features the phenomenal


ARC - Acoustic Resonance Compensation


- circuits, yes, exactly the same that are incorporated in the FM 268C. 



Located behind a protective panel on the front of the FM 266-MKII RC the ARC circuits can guarantee amelioration of reproduction by eliminating room resonances.

Room modes occur when parallel surfaces create one or more pronounced resonance peaks that are superimposed on the actual music resulting in boominess and poor low and low-mid frequency definition.

The ARC is also helpful when there are resonances from other sources in the room (e.g. air conditioning or any other resonating surface or room component).


With FM ACOUSTICS new ARC circuits - all in pure analogue technology - such resonances can be corrected resulting in a much ameliorated reproduction in any listening environment. 


The set up of the ARC circuits requires knowledge and test equipment. Our official distributors perform this service at no charge to our clients.



Offer for a singular experience


to realize the amazing improvement the ARC brings to any room contact the official distributors in your area and request a personal demonstration. Or send an email to . You will then be contacted by our distributor.





True-impedance attenuators

Compatibility with any domestic or professional equipment is assured via ultra high accuracy true balanced inputs including optimization switches
Compatible with any domestic or professional units thanks to ultra high accuracy true balanced circuits.


New settable linear impedance attenuators are on balanced inputs I, II and III.


These are very useful with today's high level components (converters, download servers, CD/DVD/Blue Ray players etc.) some of which produce excessively high output voltages - far above the standardized levels.

Such excessive levels can overload input stages and they force the user to set the Level control on the line stage to very low settings, so low that the line stage actually works as an attenuator  instead of a pre amplifier.

The new input attenuators of the FM 266 MKII series lower the excessive levels whilst guaranteeing perfect balancing (not an easy feat!). This in turn results in optimized gain structure of the system and ideal Level Control setting. 



Optimal gain structure

Optimal system gain structure setting via adjustment switches
Higher flexibility in obtaining optimal system gain structure via adjustable gain


To allow optimization of the total system gain - which differs widely from one system to another - further level switches allow fine tuning of the internal gain of the FM 266-MKII.
This allows more flexibility in system gain optimization.


Any system can be set to an optimal gain structure - which improves total system performance. 





"HR" modules

In the center: the new HR modules...
In the center: the new HR modules...


The new HR modules are used on the inputs. They help to achieve an astounding 100dB of rejection of Interference, hum, noise etc.) making the FM 266-MKII immune against such negative influence.

This outstanding interference rejection ratio is achieved not with cheap op amps but with fine-tuned discrete Class A circuit configurations guaranteeing the ultimate resolution in the unique FM ACOUSTICS way.



Type 19200

...the new HR output circuits
Fine-tuned, discrete enhanced HR modules


The new "HR" type 19200 modules are employed for the true balanced outputs. These new HR modules are the result of a multi-year development.


They achieve a superb level of reproduction and reliability.

Never before has such a level of accuracy been achieved.







Resonance-eliminator support

...and the unique new resonance eliminators
...and the unique new resonance eliminators


To avoid negative influence from spurious resonance and guarantee positive stability the FM 266-MKII employs unique resonance-eliminator supports.


These isolate the unit from potential resonances. 





Hand-selection everywhere

Meticulous attention in every detail
Meticulous selection in every stage


Purpose built testing equipment allows the precision Output Level and Balance controls to be carefully hand selected.


In combination with top class interference rejection and ultra efficient shielding the highest level of musical accuracy and complete rejection of any non-music related signals is achieved.







Long-term reliability

Details that make the difference in long-term reliability.
Details that make the difference in long-term reliability.


Small detail make all the difference.

To the trained eye these are noticeable in many places.

Precision soldered flexible inter-pcb connections protect from potential vibration damage and contact problems this even in harsh environments. 







  • Music reproduction to dream of...
  • The only truly balanced preamplifier
  • Proprietary enhanced Class A circuitry
  • Absolutely superb rejection of interference and non-music signals - a rejection of 100 dB is achieved - which is 100-1000 times better than other so-called "balanced" equipment)
  • Unbalanced and pseudo-balanced signals are automatically balanced right at inputs
  • All of the balanced input paths have precisely the same characteristics.
  • Tremendous headroom and reserves in input signal handling capability (+21dBv!)
  • Unique, true balanced outputs automatically optimize performance with balanced or unbalanced amplifiers
  • Fully discrete circuitry using special curve-tracer analysed and listening-selected semi-conductors
  • No overall feedback / feedforward
  • Outputs drive any load and long cables with perfect reproduction
  • No more matching problems between electronics and cables
  • Precision Balance and Output Level controls guarantee absolute freedom from noise & interference.
  • No stepped or inferior sounding digital or optical volume control
  • Internal transformer utilises special shielding technology
  • Extremely low impedance power supply
  • Multiple on-board stabilisation and further stabilisation next to individual amplification stages
  • Hand-selected and individually matched components of DIN, IEC & MIL standard
  • The Resolution Series ® 266-MKII is  T H E  ultra precision high-level pre-amplification centre featuring 6 true balanced high-level inputs and a precision buffered true balanced tape/auxiliary loop


To experience for yourself this incomparable precision line stage, contact your local distributor or FM ACOUSTICS.