Dynavector P-75 Owners manual

Dynavector P-75

phono pre-amplifier

and phono enhancer

Instructions and Specifications

www.dynavector.com

Designed and manufactured by

Dynavector Australia and New Zealand / Aotearoa

The P-75 has a unique power supply that runs at over 1/4MHz. It takes
the low grade single voltage DC supply from the ac adapter and converts
it to the dual high voltages required for true professional quality audio
reproduction. The operating frequency is over 12 times higher than the
top of the audio band and it incorporates super low noise wideband
regulators in its output stage to give ultra low noise supply rails.
The internal P-75 power supply is totally self contained and stores many
times the maximum possible energy requirements for the phono amplifiers.
This means that the quality or size of the external ac adaptor is irrelevant.
Increasing the capacity of the external supply will make no difference to
the quality of the sound.
There are no input or output coupling capacitors in the P-75 signal path.
The P-75 incorporates the unique current amplifier invented by Dr Tominari
of Dynavector Systems Ltd., Japan, called a Phono Enhancer.
Note: The P-75 supply requires a higher peak current to start up and so
we do not recommend using an adaptor of less than 500mA.
The P-75 does not have any mains frequency or other low frequency
components in the power supply and so hum problems that plague
conventional phono amplifiers are eliminated.
An earth terminal is provided on the rear panel that will allow the metal
chassis to be connected to earth if required.
While the P-75 itself does not generate any hum, the tone arm and
interconnect cables may act as antennae and pick-up some hum. This
is normally removed by running an earth wire to the pre amplifier ground.
In some applications, the P-75 may need to be earthed.

P-75 power supply requirements

AC to DC power adaptor 12V 500mA DC
Two pin adaptor centre negative outer positive
Outer Diameter 5.5mm
Inner Diameter 2.5mm

Note: Power supply is not included.

Please purchase a suitable supply at your local dealer.

Specifications

The P-75 is a stand-alone phono to line level amplifier. It can operate with the following cartridge
types:

Cartridge Type Input Sensitivity Gain Loading

Low Output Moving Coil 0.2mV (200µV) or 60 & 63dB 30, 100, 470 ohms
Standard phono stage 0.15mV (150µV)

Low Output MC Zero ohms
Phono Enhancer*

High Output Moving Coil 2mV 40dB 47k (47,000) ohms
Moving Magnet
Moving Iron

*Input sensitivity and gain is determined mainly by the cartridge internal resistance.
Three resistance/gain adjustments available.