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The Vertex SSS Double Preamp is a two-channel all-analog preamp based on serial #001 of a Dumble Steel String Singer. Each channel has its own gain, filter, level, and independent EQ section with Bright/Deep and Rock/Jazz switches. Below noon the gain knob gives a fat clean boost; past that it moves into bluesy crunch and light overdrive while the active EQ shapes midrange focus between roughly 800 Hz and 1.2 kHz. Both channels are true-bypass and can be used in front of an amp, into a modeler, or straight into a cab sim/IR loader. The pedal runs on standard 9-18 V center-negative power and draws about 20 mA.

Specifications

• Dimensions: 4.6 in x 3.2 in x 1.8 in
• Power: 9-18 VDC center-negative, ~20 mA
• Input impedance: 2.2 M ohms
• Output impedance: 10 K ohms
• Controls per channel: Gain, Filter, Level, Bright/Deep switch, Rock/Jazz switch

Condition

This item has been tested and is in good working condition. It does not come with original packaging. It has Velcro on the back. No power supply included.