Resolution Series power amplifiers are the result of a three decade-long effort utilizing most advanced research methods and facilities. At the outset it was clear to all involved that
this would be the ultimate statement of precision power amplification and that anything ever made - including all previously made FM ACOUSTICS amplifiers - would have to be clearly
The engineers have absolute freedom to use whatever components or technology they deem necessary to guarantee that unprecedented performance will result. The Resolution Series is the ultimate range of audio electronics. Designed without any constraint on time, resources or finances our engineering team has been able to leave the beaten path of audio electronics design, try new and different solutions to resolve common limitations, fine tune these new technologies and test them thoroughly. This support from all parties involved results in a unique creative spirit and culminates in singular developments.
While some of the technology used in the Resolution Series is unorthodox it is always based on the proven laws of physics combined with a wealth of practical experience in the field.
All Resolution Series power amplifiers use the same technology and components and are handmade by the same craftsmen. They only differ in output power, size and weight.
The developments are proprietary and provide a true breakthrough in the performance of power amplifiers. The final results set definite and absolute standards in every respect.
The Resolution Series is the breakthrough product range that has made the FM ACOUSTICS brand name famous all over the world.
The Resolution Series precision power amplifiers incorporate a series of advanced processes and solutions.
In the Resolution Series the amplifiers' dynamic output current is entirely unlimited. Depending on model, the output current capability (20A RMS to over 70A RMS and repetitive peak currents of up to 550A per channel!) guarantee that no form of limiting, compression or any other negative influence on the audio signal is possible. Unlike other power amplifiers fuses in the signal line, in the DC supply or anywhere else in the audio circuitry are completely avoided. At the same time the speakers and the amplifiers are fully protected by proprietary, intelligent safeguarding circuits.
Creating a high-current output stage is one feat, but doing so while at the same time guaranteeing absolutely pristine music reproduction and ultimate protection is quite another achievement.
With dynamic music signals the Resolution Series amplifiers can drive any known speaker - in fact any impedance or complex multi-driver arrangement - without limiting or compression and with perfect stability, thereby achieving astonishing performance improvements.
To achieve this, the dedicated FORCELINES cables are required to connect the amplifier circuits to the speakers. Only with FORCELINES can the amplifier perform optimally. The amplifiers were all designed WITH FORCELINES to guarantee that the amplifier's performance shows at the speaker - and not just at the amplifier's output sockets. While with some amplifiers other cables may work fine, they will be wrong when using an FM ACOUSTICS amp. One of the reasons is that the output current capability of all Resolution Series amplifiers are much higher than others. Higher current demands a higher capacity cable.
A further important difference is the output impedance which on FM ACOUSTICS amplifiers is much lower than in other amps. A lower output impedance requires that the corresponding cable has correspondingly lower impedance. This is the reason why the Resolution Series was designed including FORCELINES and this is the reason why every order for a Resolution Series amplifier must be accompanied by an order for FORCELINES 5 or FORCELINES 3. Any other cable will not let the Resolution Series achieve full performance.
Nowhere are components matched like as at FM ACOUSTICS. Special testing machines have been developed for this purpose. Each and every building block, p.c. board and part assembly goes through multiple performance tests during the entire manufacturing process. See further information in "Production Methods" >>Production.
FM ACOUSTICS' exclusive enhanced Class A circuitry is used in all amplification stages, from the discrete (no IC's or op amps), precision balanced, symmetrical inputs to the multiple voltage gain and ultra-linear, high-current output stages. Proprietary design criteria, entirely hand-selected components of the absolutely highest quality (many of them specially made to FM ACOUSTICS' specifications), ultra accurate calibration and the most dedicated craftsmanship result in the finest standard.
Compared with other amplifiers of similar power ratings, the Resolution Series drives speakers effortlessly to higher levels. Actual SPL (Sound Pressure Level) differences of between 2
and 8 dB have been documented. This astounding distortion-free dynamic increase is one of the characteristics which clearly demonstrates the remarkable superiority of FM ACOUSTICS' power
Most other amplifiers for domestic use have no protection circuitry to speak of. While this avoids the usual drawbacks of protection circuits, (which negatively influence sound reproduction) it leaves both the speakers and the amplifier without safeguards against possible errors and dangerous non-musical signals.
FM ACOUSTICS power amplifiers utilize totally unique and proprietary circuitry to protect the amplifier and the speakers from open circuit, short-circuit, DC+ offset, DC- offset, high frequency oscillation, switch-on transients, excessive temperature, thermal overload, channel burnout and other problems. Any error conditions will instantly trigger the protection circuits and disconnect the output at the same instant as blinking the mains light. Three different coloured indicators will indicate which fault is present so corrective action is possible immediately. As soon as the error situation is no longer present the amplifiers resets automatically.
A note about specifications: these are often misused, misunderstood, or utilized only to sell a product instead of indicating its actual performance capabilities. "Typical" specifications will 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.
One example is power, where you will see absolutely stratospheric power ratings far away from any reality ('500W' units that have a 150W power supply, ghetto blasters rated at "800W" etc.). Even
in 'high end' products actual differences of up to 300% have been experienced.
Compared with other amplifiers of similar power ratings, an FM ACOUSTICS amplifiers drive speakers to higher levels - and effortlessly so. Actual SPL (Sound Pressure Level) differences of between 2 dB and 8 dB have been documented. This astounding distortion-free dynamic increase is one of the exceptional characteristics of FM ACOUSTICS' amplifiers. The result: an FM ACOUSTICS amplifier that is less powerful on the spec sheet will provide more dynamic, higher clean sound level with better performance than amplifiers rated at much higher power.
More differences in characteristics and performance are not visible in spec sheets. Bear this in mind when comparing specifications as such matters make all the difference in actual reproduction accuracy.
All specifications are guaranteed minimum figures for every single product that comes of the final test.
The measurements and specifications below apply to a normal living room environment with a mains supply of 10A at 230V or 20A at 115V AC (with the exception of the FM 1811 ultra high power amplifier which requires higher mains power).
These conditions are more realistic than those which are present in a laboratory, where high-performance power supplies can be utilized.
This also means that the specifications and performance are realistically achievable results in a home environment. In a laboratory environment the specifications may be even better. The above must be kept in mind when comparing the specifications with those of other products which are taken in laboratory environments and are "typical" rather than guaranteed minimum.