The SBEQ is a clear, warm, tube-like, treble/bass booster. The EQ controls do go +/- and it is built in such a way that if pushed hard, it will distort in a pleasant way much like an expensive tube EQ would. It also has an overall warming clarity that improves the fidelity of all distortions…even non-BJFe-designed ones! ; ]
The SBEQ…much more than just an equalizer.
Runs at 9V-18V… 18V gives more headroom and clarity.
“Its like having a Neve on your pedalboard…” ~ Eric “Roscoe” Ambel