Sound studios go to great lengths to ensure that the music they record is of the best possible quality before storing it on a compact disc. When you buy a CD, therefore, you should be fairly confident that it contains a reasonable digital recording. However, when you play the CD on your hi-fi system at home, you may find the sound far from ideal. There are several factors which may compromise the quality of sound reproduction. One of the most significant problems is the occurrence of low-voltage, electrostatic fields as the disc is being played. The STATMAT electrostatic control system deals with this problem and, in doing so, removes a major cause of imperfect sound reproduction.

During play, a CD revolves at a very high speed in a closed and dry environment. At the same time, the drive motors and digital circuitry generate a lot of heat. These factors combined precipitate a gradual build-up of electrostatic fields. The static does not cover the CD evenly, but rather appears in the shape of low-voltage hot spots randomly spread over the disc's surface. The fields rapidly increase and intensify as the CD is played.

The digital circuitry inside a CD player reads the information captured on the disc via a laser beam. The information is stored in digital form as binary (effectively, a series of zeros and ones). It interprets these numbers and converts them into an analogue signal, which is then sent to the loudspeakers. When static builds up on the CD, it can interfere with the interpretation of the digital information. This means that, when the digital-to-analogue conversion takes place, an impaired signal is produced.

Essentially, therefore, the signal is suffering from distortion. Electrostatic build-up introduces continuous electrical vibration, resulting in phase changes. If strong enough, this vibration can cause the phase to shift 45o, 90o or even higher and could make the absolute phase appear inverted.

These phase anomalies can affect the timing of the music, with disastrous consequences on the quality of the reproduction. The timing of notes is crucial to the experience of music. To our ear, timing represents texture, dynamics and distance. It is the signature which musicians put on their music and which allows us to recognise a piece as being performed by them. During playback, certain knowledge of a piece of music leads to expectation of what comes next. If it is slightly out of time, our musical experience is compromised. An accurate, phase- coherent signal is therefore essential for musical enjoyment and appreciation of the performance.

STATMAT, developed by QR Design, eliminates static induced signal phase distortion by dispersing the low-voltage hot spots while a CD is being played. It is placed on the CD and works during play-time.

The disc itself does not need to be treated beforehand although, of course, it does need to be clean. STATMAT is made of biaxially-oriented polypropylene film. This type of plastic is more resistant to abrasion and wear than standard, extruded polypropylene. As it is pre-strained, it should not stretch during use. The film is coated on both sides with an aqueous dispersion of polyvinylidene chloride copolymer - which itself has anti-static properties - and specially formulated, conductive inks.

The inks are positioned on the top and bottom of the film in two specific patterns, which are the key to STATMAT's functionality. The two patterns work together to disperse the electrostatic fields across the CD's surface. Low-voltage surges are evened out and hot spots eliminated. As a result, the digital circuitry is able to interpret the binary information more accurately and translate this into a clearer, phase coherent signal. The polypropylene material brings with it an additional benefit: STATMAT weighs a mere 3mg. This means that - unlike some competitive products - its mass will not have any significant effect on the sound. While some damping of the disc inevitably occurs during playback, this is secondary to the conductive processes which are taking place.

In conclusion, by controlling electrostatic fields, STATMAT minimises signal distortion by ensuring phase coherence. This brings with it a host of benefits, just some of which are listed below.


  • Cleaner, crisper sound

  • Greater resolution and separation

  • Wider, deeper soundstage

  • Enhanced power and dynamics

  • Improved sense of timing and rhythm

  • Clearer intonation and voice inflections

  • Clearer ambience of recording venue

  • Simply more natural, more musical

STATMAT can be used with: Most CD players and transports, midi and mini systems and other packaged systems and portables.

STATMAT cannot be used with: Some multi-play CD players. Most in-car CD players. Most vertical CD players.


  • Size: 116.25mm outer diameter 21.25 - 22.75mm inner diameter

  • Film thickness: 0.03mm Film weight: 0.3g


  • Size: 107mm outer diameter 18mm inner diameter

  • Film thickness: 0.03mm Film weight: 0.3g