Guitarix team
17 Pedalboards using it

GxSVT

Plugin screenshot

Tube based bass pre-amp simulation

Control Default Min Max
BYPASS 1 0 1
BASS 0.50 0.00 1.00
MIDDLE 0.50 0.00 1.00
TREBLE 0.50 0.00 1.00
VOLUME 0.20 0.00 1.00
LOWSWITCH 1 0 2
MIDSWITCH 1 0 2
HIGHSWITCH 0 0 1
CABSWITCH 0 0 1
http://guitarix.sourceforge.net/plugins/gx_ampegsvt_#_ampegsvt_ v.1:34.0-5