- FM ACOUSTICS does not need superlatives in product descriptions but all experts who have experienced the new FM 133 & FM 233 Linearizers react the same way:
- "This is a revolution, a true breakthrough".
- "This is the most spectacular improvement of music - in fact of any audio source - in the last 40 years".
- "A tremendous achievement"
- "The most important component of a quality Audio and AV system"
Click on the picture to enlarge
Wherever they are put into action,
the unique Harmonic Linearizers amaze...
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Today, the major limitation in audio reproduction is no longer so much the quality of reproducing equipment. The most limiting factor are the many mediocre sounding sources, be they CD's, DVD's, LP's, Tapes, Shellacs etc.
Whatever the audio system, its reproduction is only as good as the source. There has been a profound lack of equipment that allows the restitution and improvement of music sources.
Until now...
The dream and ultimate goal of musicians, engineers and music afficionados has finally become reality: be able to correct errors and weaknesses in music recordings and Film/DVD sound without influencing the original signal!
- It is quite an experience to be able to improve cheaper pressing of LP's to the level of - and sometimes better than - the best (and often rather expensive...) early stamper pressings!
- To make a standard pressing sound equal to or even better than the best of expensive special audiophile pressings, half-speed masters, direct disks etc!
- To be able to improve re-issues while avoiding the noise and poor pressing quality of certain rare originals
- To be able to create one's own masters (CD's etc.) improving the original!
- To linearize the reproduction of movie sound and achieve much improved clarity and realism!
The FM 133 & FM 233 Harmonic Linearizers allow precise correction and linearization of non-optimal recordings. They do this in an absolutely unique way. For the first time bad resonances, colouration, noise, obnoxious sound and other limitations are improved without affecting the balance of the audio signal. While the characteristics and transparency of the original signal is kept pristine, attenuated parts of the music spectrum can be strengthened.
The method of operation is rather intriguing as the entire audio signal takes a direct path from input to output. The improvement is achieved by a unique additive/subtractive Linearizer bank that corrects aberrations. Using just five controls, any frequency (or group of frequencies) in the entire audio band can be optimized without negative influence inflicted on the original audio signal. Furthermore, the signal always remains purely in the analogue domain.
When looking at the front panel one could be reminded of an equalizer. However, the Harmonic Linearizer's mode of operation is different and avoids all limitations. The FM 133 & FM 233 are not used like an equalizer as every control is dynamically interacting with the others. There is no ripple in the pass band and no phase shift/discontinuity, both of which are unsolved problems of equalizers.
Massive improvements in the reproduction quality of CD, DVD, Tape, LP and any other source are now reality. The improvements are described anywhere from "truly amazing" to "incredible".
While some near perfect recordings will not need much linearization, good recordings will become great, mediocre recordings will become rather nice and some downright unlistenable recordings will become listenable. The improvements are rather intriguing and must be experienced to be fully realized.
- Unique linearization of source signals improves reproduction of any kind of audio, movie, AV or music system
- The FM 133 and FM 233 can be connected to single-ended, pseudo-balanced and true balanced equipment
- The FM 133 is for use with single ended equipment
- Unbalanced and pseudo-balanced signals are automatically balanced right at the input of the FM 233, which is the correct choice for balanced interfacing.
The FM 233 features FM ACOUSTICS' true balanced input and output circuitry with a guaranteed CMRR of 100 dB (100 times better than other so-called "balanced" equipment).
- Special centered linearizer controls
- Tremendous headroom and reserves in input signal handling capability (+21dBv!)
- Fully discrete circuitry using special curve-tracer analysed and listening-selected semiconductors
- Zero overall feedback/feed forward
- Outputs drive any load and long cables with perfect stability
- Switchable tape loop function on the FM 133
- Sensors in the truly balanced outputs of the FM 233 automatically optimise performance for balanced or unbalanced loads
- Dedicated low impedance power supply
- Individual multiple stabilisation
- Hand-selected and individually matched components of DIN, IEC & MIL standard
- Totally modular concept, guaranteeing that the FM ACOUSTICS Harmonic Linearizers do not become obsolete
- Proprietary enhanced Class A circuitry throughout
- Can be installed in any system thanks to easy in-line or tape loop connection
They work in any system!
Two connection possibilities for domestic systems:
a) in the preamplifier tape loop (top part of drawing)
b) in-line between preamp and power amp (bottom part)
In professional applications various routing/connections are possible
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After a tremendous research program and after dozens of rejected circuit topologies the combination of several ingenious ideas brought the final breakthrough: with the new Harmonic Linearizers the improvement of any type of source signal is now reality.
The FM 133 & FM 233 are universally usable in any system and bring astounding improvements in any professional or domestic application where audio is involved.
If you are interested in a presentation of the FM 133 & FM 233 Harmonic Linearizers please advise. You will be contacted in due time.
© 2002 FM ACOUSTICS LTD. Last update of this site June 17, 2009