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GENERAL PRECAUTIONS & SAFETY NOTES

1.

DANGEROUS VOLTAGES EXIST WITHIN THE CHASSIS. DO NOT REMOVE
CHASSIS  COVER  UNTIL  UNIT  HAS  BEEN  SWITCHED  OFF  AND
UNPLUGGED  FROM  THE  WALL  OUTLET  (POWER)  AND  ALL
COMPONENTS FOR 15 MINUTES. TUBES BECOME HOT IN USE, AND CAN
CAUSE INJURY. DO NOT EXPOSE CHASSIS TO MOISTURE. DO NOT PLUG
INTO AN AC SOURCE UNTIL ALL CONNECTIONS ARE COMPLETED AND
ALL COVERS ARE INSTALLED.

2.

Complete all signal connections 

before

 connecting the AC cord to the wall outlet and

turning the unit on. Similarly, always turn the amplifier off and remove the AC power
cord before detaching cabling. Failure to observe this sequence can result in damage
to the amplifier, speakers or associated components.

3.

At  turn  on,  all  volume  controls  should  be  full  counter-clockwise.  Allow  one  (1)
minute for warm up before disengaging mute and commencing playback. Note: Mute
is automatically engaged when switching on units equipped with the remote control
option.

4.

For protection of your speakers and power amplifier, always engage “Mute” before
switching the power off or on. Note: Mute is automatically engaged when switching
on.

5.

DO NOT OPERATE THE UNIT IF IT IS WET.

6.

THE  CHASSIS  CONTAINS  VACUUM  TUBES.  DANGEROUS  VOLTAGES
EXIST WITHIN THIS CHASSIS. NEVER REMOVE THE  COVER UNLESS THE
UNIT  HAS  BEEN  SWITCHED  OFF  AND  COMPLETELY  DISCONNECTED
FOR AT LEAST 15 MINUTES. THE TOP COVER MUST ALWAYS BE LEFT
SECURELY IN PLACE.

7.

Take care to install your preamplifier securely in a sturdy, well designed stand so that
it will not fall or tip over (this could cause serious, possibly fatal injury).

Summary of Contents for Sigma

Page 1: ...lification Company VAC Sigma Preamplifier Instructions Manual issued 3 March 2008 Revised 2 April 2008 Please read carefully before installing Copyright 2008 by Valve Amplification Company All rights...

Page 2: ...t VAC INTRODUCTION The VAC Sigma Preamplifier is an all new design derived from the VAC Phi Beta and employs four twin triode vacuum tubes operating in Class A This unique design provides great speed...

Page 3: ...associated components 3 At turn on all volume controls should be full counter clockwise Allow one 1 minute for warm up before disengaging mute and commencing playback Note Mute is automatically engage...

Page 4: ...und terminal provided on the rear panel See Phono Section for cartridge types appropriate for use Connect output interconnects to your power amplifier 3 Connect the AC power cord to the IEC connector...

Page 5: ...of a tape deck this output can supply signal to any typical line level input enabling it to control a second zone in multi room installations Cinema This switches between Source and Cinema a fixed vo...

Page 6: ...erate condition When muted a red glow will be observed in the LED indicator Mute is automatically engaged when switching on units equipped with the remote control option NOTE ON ABSOLUTE PHASE Through...

Page 7: ...ew Tubes Original Equipment Replacement tubes are available from VAC These tubes ensure your Sigma Preamplifier will meet or exceed all factory performance specifications DANGEROUS VOLTAGES EXIST WITH...

Page 8: ...spares VAC will be happy to test tubes for concerned customers WARRANTY Your equipment is warranted for a period of thirty 30 days from the date of purchase In addition if the registration form is re...

Page 9: ...tput Inverting to RCA Pin 2 positive hot on XLR pin 3 negative Tape output Unity gain from selector non inverting archival correct Phono stage preamplifier optional Gain 40 dB MM 60 dB MC measured at...

Page 10: ...______________________________________________________________________ __________________________________________________________________________ What made you decide on the VAC ______________________...

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