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2. User Manual
2.2.5.2 Choosing a Tank
The most important parameters to focus on, when selecting a spring
tank to use together with the Spring Reverb in the Field Kit FX, are the
input impedance, output impedance and the input/output coupling.
The Spring Reverb circuitry inside the Field Kit is optimized to work
best with spring tanks having 190
Ω
input impedance, 2,575
Ω
output
impedance, and configured as input floating / output grounded. This
corresponds to a spring tank of a type 8BB_C__. A tank of the men-
tioned type is included in the Field Kit FX Expansion Pack.
When you want to use a different tank, make sure that its coupled as
Input Insulated / Output Grounded (C). The input impedance is rec-
ommended to be 190
Ω
, but also impedance around this region work
(type 1/4/8/9 B/C/D). It’s not recommended to use the type A input
impedance (8
Ω
/10
Ω
). The output impedance is recommended to
be 2575
Ω
, but also impedance above this region work (type 1/4/8/9
C). It’s not recommended to use the type A output impedance (500
Ω
/ 600
Ω
). For the rest of the parameters, experimentation is encour-
aged!
