PreSonus BlueTube DP v2 - Manual (Page 17)

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Owner’s Manual
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Resources 4
Vacuum Tube Care and Maintenance 4.1
4.0 Resources
4.1 Vacuum Tube Care and Maintenance
The BlueTube DP V2 is equipped with a 12AX7
vacuum tube. This tube works well in a wide variety
of situations; however, some owners may wish
to experiment with other compatible vacuum
tubes to explore additional tonal possibilities.
There are many different 12AX7 tube brands from
which to choose but you must use a 12AX7.
Tube life and performance are affected by how
often the tube is used and how hard the tube
is driven while in use. Poor performance and
microphonics (noise caused by mechanical
vibration of the elements of an electron tube,
component, or system) are the most common
signs of wear. Periodic replacement of the vacuum
tube is recommended. There is no predetermined
time for replacement. If you notice that the sound
quality in your BlueTube DP V2 has deteriorated,
it is most likely that a worn-out tube is to blame.
4.1.1 How to Replace the Tube
1. Unplug the unit. Proceed with cau-
tion, as the tube could be hot.
2. Remove the two screws from the top and
the two screws from the bottom of the
unit, located near the side panels.
3. Remove both side panels.
4. Remove the two screws from each of the
XLR connections (inputs and outputs) on
the back of your Blue Tube DP V2.