Owner`s manual

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9!
Tube Rolling: Your Fosgate Signature phono stage ships with an
extra 12AT7 tube that can be used in place of the 12AX7 in position V3 to
give a slightly more detailed top end. Final choice will depend on listener
preference and audio system.
Do not change tubes when the unit is powered on. To avoid risk of
burns, do not touch vacuum tubes when the unit is powered on or
within 30 minutes of powering down.
Below is a list of equivalent tubes used in your Fosgate Signature
phono stage if you wish to tube roll. Please check with your Musical
Surroundings’ dealer regarding availability of tubes for this purpose.
Please note that tubes obtained from an independent source that
causes damage to your Fosgate Signature phono stage is not
covered under the warranty.
V1 and V2 - 6DJ8/ ECC88
Equivalent: 6922/ E88CC, 7308
V3 and V4 - 12AX7/ ECC83
Equivalent: 7025, 5751
V5 and V6 - 12AT7/ ECC81
Equivalent: 6201
V7 - 6X4 - high voltage rectifier