phase shift tone control

[Andy Le Blanc]

heres a tone option..... you seen phase shift networks in tremolo circuit
as an occilator or as a filter ..... this one from a marshall bass as a "slope"
control..... Ive some intention of including this in a bass amp.... ideas of
where in the signal chain to place it would be appreciated......
theres an example of this in one form in sound city bass amps.....