Instruction Manual

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 OUTPUT 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.
For power amplifiers with XLR input jacks, you must determine if the input is truly balanced,
or if either pin 2 or 3 is actually tied to ground (unbalanced XLR):
S For true balanced inputs , select “BAL”.
S For power amplifiers with unbalanced XLR inputs, select “SE”. This will ONLY work if
the amplifier ties pin 3 to ground (EIA standard); if pin 2 is tied to ground it will be
necessary to modify the power amplifier to meet the EIA standard.
OPERATION
Before turning the power switch to the “on” position, mute the unit by moving the “Mute”
switch to its clockwise (i.e., muted) position. You might also want to turn the “Volume”
control fully counterclockwise.
Mute is automatically engaged when switching on the unit.
Allow the preamplifier to warm up for a minute before you un-mute the unit; failure to wait
can cause a transient to be sent through your power amplifier that might cause damage to
your loudspeakers.
As with all high fidelity products, the sound characteristic of the VAC changes somewhat
as it warms up. Best sound will be achieved after about 15 minutes of operation.
Any time that the VAC Renaissance Preamplifier has not been used for a few weeks the
sound may be different. This is also normal for high resolution audio equipment. Optimum
sound should return after a few hours of operation, preferably with an audio signal.