VAC Phi Alpha 160 Musicbloc - Manual (Page 5)

Page 5
Basic Hookup:
1) Connect a volume-controlled line-level source to either the input RCA connector for ‘single-
ended’ sources or the input XLR connector for balanced sources. Set the front switch to
reflect the connection used.
2) Connect loudspeaker cables to the five-way binding posts on the rear panel. Make sure that
all connections are tight (Do NOT over tighten, or damage to amplifier or speaker cable may
result), and that heavy or bulky cables are properly strain-relieved.
4) Connect the AC power cord to the IEC connector on the rear panel. ALWAYS connect
power cord to component before plugging it into an AC outlet, and make sure that unit’s
power switch is set to the “off” position before making the final connection. For best
performance, try to route the power cord away from signal cables.
5) For first installation or when a KT88 tube is changed.
As the amplifier warms up, check the tube bias, adjusting output tube bias as necessary (see
“Output Tube Bias Adjustment”). The output tubes will first draw current approximately 40
seconds after switching the power on, and the amount of current drawn will tend to climb
rapidly for the first minute or two, and then slowly for another 10 - 30 minutes.
As with all high performance audio products, the sonic characteristics of all VAC products will
continue to improve during the first several hundred hours of use.
NOTE: Do not force the tubes into their sockets. The central “key way” of each tube indicates the
proper alignment. Only gentle pressure should be required to seat the tube. If you encounter excess
resistance, try gently wiggling the tube, so as to allow the tube’s pins and the socket’s contacts to
align with each other.