Genus Modu Low Impedance Bus Board (LIBB)

The Genus Modu Low Impedance Bus Board (LIBB) is designed to be the lowest noise eurorack passive bus board. It is based on concepts used in high power computer server products, providing ultra low impedance – both resistance and inductance – for the ground and main power rails and effective capacitance, resulting in significantly lower noise coupling across modules while also reducing power supply noise.

Description

Ground plane resistance, board only, worst case: less than 400 microohm (0.400 milliohm)

+12V plane resistance, board only, worst case: less than 1.5 milliohm

-12V plane resistance, board only, worst case: less than 1.5 milliohm

+5V trace resistance, board only, worst case: less than 11 milliohm

+12V plane capacitance: 771 uF, options for 551 and 331 uF

-12V plane capacitance: 771 uF, options for 551 and 331 uF

+5V plane capacitance: 275 uF

CV trace isolation from Gate, board only: better than -100 dB

CV trace isolation from +5V Power, board only: less than 100 microvolts of noise on CV from 100 mV of noise on adjacent +5V power

PCB board dimensions, 1.9 inches by 11.2 inches (48.3 x 285.5 mm)

Bus board dimensions including connectors, 2.54 inches by 11.65 inches (64.5 x 295.9 mm)

Minimum Clearance for side mounted power cable connectors, 3.90 inches by 13.20 inches (99.1 x 335.3 mm)

Maximum height, components, PCB, standoffs: 0.683 inches (17.3 mm)