TRUTH IN AUDIO PAGES
- High performance turntable power supplies for AC or DC motors. These power supplies, using advanced filter techniques enabled significant improvements in transparency, especially of musical bass transients.
- High transparency vacuum tube moving coil cartridge head amplifier, using innovative advanced unbalanced circuitry for extreme linearity.
- High resolution LP phonograph equalization unit (commonly known as phono stage). The circuitry is completely revolutionary and not based on any existing methods of phono equalization. This unit receives power from a power supply of advanced innovative filter design. A unit of similar design may serve to equalize tape head output for direct feed from master tapes.
- High transparency line-level frequency range crossovers. This unit is unity-gain, employing vacuum tube cathode followers, and creates a close to ideal Linkwitz-Riley crossover function. It is used with a two-way speaker system and bi-amplification (separate amplifiers for treble and bass frequencies). This arrangement enables the amplifiers to be connected directly to the speaker drivers, without any intervening crossover elements. This creates the ideal unity between the amplifier and the speaker, for highest possible performance. This crossover unit was equipped with separate gain controls for the high and low frequency channels, which is effectively a high-resolution tone control, which is very useful for equalizing to account for variations of driver efficiency and program material equalization.
- Advanced design speaker system. Like the amplifiers developed based on the ideal amplifier, I have identified characteristics of the ideal loudspeaker, and have developed a speaker system that closely matches the ideal in performance. This speaker system is extremely innovative in design, and provides clarity from lows to highs that is high performance. Some aspects of this speaker represent a significant advance over existing speaker designs.
Copyright 2011 Duncan Scobie. All rights reserved.
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