Owner`s manual

9
Tube Rolling: Your Fosgate Signature headphone amplifier ships with
two carefully selected, new production 12AX7 tubes.
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
headphone amplifier 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 headphone amplifier is not
covered under the warranty.
Below, we provide a space to notate your personal notes on sonic
differences with tube rolling.
V1 and V2 - 12AX7/ ECC83
Equivalent: 7025, 5751
My Notes on Tube Rolling