VAC Signature Preamplifier Mk I - Manual (Page 5)

INPUTS (back panel)
Four pairs of RCA jacks accommodate unbalanced line level sources. These correspond to
SELECTOR positions “L1" through “L4".
One pair of XLR jacks accept a balanced or unbalanced line level source. This corresponds
to SELECTOR position “BAL”.
Note: not all units with XLR connectors are balanced. Many are unbalanced, with pin 2 or
pin 3 tied to ground. The Signature Preamplifier accepts such sources.
One pair of RCA jacks accommodate a home theater surround sound processor (left & right
front channels). When the CINEMA selection is made, the output from the processor is
routed directly to the power amplifier at a fixed gain. This allows volume levels to be under
the sole control of the processor, allowing easy integration of your high-end stereo system
into a home theater system. When no processor is connected, please keep shorting plugs
in these jacks.
One pair of RCA jacks accommodate the monitor return from a tape deck. If you do not
have a tape deck, these jacks can be used as an additional input.
Units without the optional phono section have two RCA jacks labeled “MC”. These act as
a line level input, engaged when the SELECTOR is set to “PHONO”.
Units with phono have two sets of RCA jacks, labeled “MC” and “MM”, to accept phono
cartridges of low or high output. The switch should be set to “MM” or “MC” to match the
inputs used. The ground lead from the turntable should be connected to the binding post
located by these jacks.
OUTPUTS & GROUNDING SWITCH (back panel)
One pair of RCA jacks provide line level output to a tape recorder. The level of signal is not
adjusted by the volume control.
Two sets of RCA output jacks are provided as main outputs to power amplifiers. In addition,
one pair of XLR jacks can be used to drive a power amplifier.
The GROUND switch must be set correctly for the output configuration being used.
Incorrect setting will result in either excessive buzz, or cause gross distortion of frequency
response and output.