OAM VB-4
The VB-4 has a matched quad of silicon transistors with controls for Volume and Bias of each one. The pedal can be used with the input jack on the far right, and output jack on the far left for two VB-2 pedals in series.
The middle two jacks will pass your signal from one to another if there is no other cables inserted. The pedal can also be used as two VB-2 pedals completely independently for stereo use, or as separate places in your signal chain. I have been using a VB-4 with one half before distortion (for high gain doom) and the other half after distortion (for high volume solo).
VB4-001 Brushed top with large black Davies knobs.
VB4-002 Brushed top with large oxblood Davies knobs.
VB4-003 Brushed top with large cream Davies knobs.
VB4-004 Brushed top with large oxblood Davies knobs.