Physical location and cable "dress" can be an important factor in
minimizing hum pickup. The installation should situate the preamplifier
well away from the power amplifier, and power (ac mains) cords should
be dressed to remain at least 4" (100mm) away from input/output
cables.
Connection
AUX1/PH: On a PV10AL, this is an additional line-level input, and is
identical to the other inputs. On a PV1OA with phono stage, this input
provides the amplification and equalization required by moving magnet
and high output moving coil cartridges. The phono input impedance is
the industry standard 47,000 ohms shunted by approximately 100 pico-
farads capacitance. This is well suited to nearly all moving magnet and
many high-output moving coil cartridges. If necessary, the input imped-
ance can be lowered by soldering a resistor across ( from center pin to
ground) the input jack. To achieve a desired input resistance of RD, use
the following formula to compute the required additional resistance RA:
RA = (47000 x RD)/(47000-RD)
Some moving magnet cartridges require higher capacitance for opti-
mum performance. Increasing the input capacitance may be achieved
by soldering a suitable value capacitor across the phono input jack. Use
polystyrene capacitors for this purpose.
TUNER, CD, VIDEO, AUX2, TAPE IN: These are high level inputs and
are electrically equivalent. They present a 50k ohm load to the source.
The outputs of your tape recorders should be connected to "TAPE IN".
TAPE OUT: This output connects the selected signal to your recorder or
external processing loop (eg. equalizer). The output signal is not af-
fected by the level control. Connect "TAPE OUT" to the inputs of your
tape recorder or external processor.
MAIN OUT: Connect this output to the input of your amplifier(or cross-
over in a bi-amped system). We recommend the use of an amplifier with
an input impedance of 10k ohms or higher. Since the PV10A inverts
phase, it may be necessary to invert the speaker leads to maintain
correct phase. See the section on "Getting the most out of your PV10A"
for an explanation of this.
PV10A Owner’s Manual
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