Dynavector DV- PHA-100 Instruction Manual
The Dynavector phono head amplifier PHA-100 is a complete redesign of our original head amplifier the PE-1, using the most advanced and highest quality IC's, resistors and capacitors available at the present time. The PE-1 was designed more than 15 years ago using an entirely brand-new patented circuit. During the development of the XV-1, we optimized its superb performance through use of the original PE-1, making it superior to any cartridge currently available, including our own. To build on this we then decided to redesign the PE-1 specifically to become the most advanced and most favorable head amplifier for the new cartridge. Now all the weaknesses of the PE-1 have been eliminated after comparing many prototypes using alternative components. The result is the PHA-100. Important factors in reproducing music such as the natural ambience, the correct dynamism and comfortable harmonies are easily overlooked by conventional signal amplification of the cartridge output voltage. As you already know, there are many expensive and high performance head amplifiers or step up transformers for MC cartridges. They are designed to amplify the very low output voltage of MC cartridges as perfectly as possible. In the PHA-100 the maximum current is extracted from the cartridge by an active electronic circuit, then this current is converted to a voltage, which is enough to drive a conventional preamplifier. In the case of PHA-100, the current sensitivity of the cartridge is the most important factor. By using current amplification, magnetic distortion of MC cartridges can be reduced considerably, but S/N ratio was still a problem 15 years ago. Today, thanks to latest developments, very low noise operational amplifiers are available. So the S/N problem of head amplifiers has gone. PHA-100 has impedance select switch to match either to low impedance and medium impedance MC. Users are able to get better sound from each MC by this switch. In PHA-100, a patented circuit for developing more realistic music is employed. DV-DRT XV-1, DV-PHA-100 and DV SuperStereo are our answers to a digital industry threatening to destroy much the great musical heritage of our century.
