HAL

Onboard Preamp PCB Install Guide V2 The latest addition to our range of ready-to-install PCBs based on classic onboard bass preamps - HAL. Based on the fabled Spector Haz Labs preamp, this board allows you to finally achieve that classic tone for a reasonable price. This version features the same EQ circuit as the original, along with a few in-house tweaks to make installation easier. We’ve added extra ground pads to help cut down on wiring as well as dedicated 9V out pads with reverse polarity protection for powering active pickups. Specs Power Supply: 9-27V Current Draw: ~1ma PCB Size: 36 x 25 x 3mm Potentiometers Required: 2x B100K. Use pots with centre detents to indicate flat positions on EQ. Click here for our range of pots. Controls Bass Treble Please note: I do not include a printed version of the manual or use commercial packaging for our products. You'll find a PDF manual linked at the top of every product page. This helps me keep prices down and reduce waste.