Violectric PPA V600, User Manual

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which, however, can easily be compensated by the balance control, with
an adjustment range of +/-2 dB and a detented centre position.
In order to maintain minimum crosstalk, balance is set by means of fine
adjustment of the right channel, instead of a conventional balance pot
as found on other devices.
AMPLIFIERS / INTERNAL SETTINGS
The low input signals are fed to a so-called instrumentation amplifier,
originally intended for the use with professional microphones. This
allows extremely low-noise amplification vastly superior to any other
design, while offering an internal bandwidth of >200 kHz even at 60 dB
gain.
Susceptibility to hum as induced by low-frequency equalization and
interference to the cable between turntable and input can be
significantly reduced by balanced coupling between the pickup system
and the amplifier, using balanced cabling.
In order to precisely match with any pickup model, 9 input impedance
and 16 input capacitance settings can be selected by DIP switches
inside the unit.
While the RIAA equalization curve is the most commonly used, the PPA
V600 can also be switched to NAB, BBC or FLAT curve. In addition, it
provides a 20Hz IEC high-pass filter, which can be inserted in the signal
path by DIP switches. All the filters are passive designs, using high-
quality and non-ageing MKP capacitors. By means of eight reference
points, the RIAA curve is precisely maintained with an accuracy of 0,05
dB.
Channel circuits are completely separate, in order to obtain optimum
crosstalk rejection.