Wiring Harness for 1x12/2x12 Cabinets (Series or Parallel Details. Specs. Back. Wiring Harness for 1x12/2x12 Cabinets (Series or Parallel) with Switchcraft J11 Jack. Back. One set (2 separate pieces) of approximately 19'' (482) twisted 18 gauge stranded black and white cloth covered wire. One piece consists of a Switchcraft J11 mono plug on one end with speaker crimps on the other end. 4x12 Cabinet Wiring - Wiring Diagrams This harness installed correctly will wire four – Four ohm speakers to 4 ohms, 8 ohm speakers to 8 ohms or – Four 16 ohm speakers to 16 ohms; Designed for use with any guitar 4×12 speaker cab. Many 4×12 cabs use cheap input jacks with 20 gauge aluminum strand; This harness is 16 gauge OFC pure copper. Jun 10, · Hi. Speaker Wiring Configuration Diagrams %%sep%% %%sitename View our speaker wiring configuration diagrams to properly match speaker load with your amplifiers output impedance to get maximum transfer of power. Wiring Configuration for 2 Speakers in Parallel : Related searches for 2 x 12 wiring diagram 4x12 speaker wiring diagrams4 12 speaker cabs4x12 guitar cab wiringmarshall speaker wire4 x 12 cabspeaker cabinet wiring diagramguitar speaker cabinet wiring diagrams4x12 cabinet