How to properly wire a 4x12 speaker cabinet | Warehouse How to properly wire a 4x12 speaker cabinet. So, this week I received an email from Scott, a WGS aficionado who was inquiring as to how he should wire his Marshall-style 4-12 cabinet. To be honest, I hadn’t given that one any thought in a couple of decades, and it made me think. 1960A and 1960B - Marshall 1960A and 1960B. Two of the world’s bestselling 4x12” cabinets, famed for their excellent sound. These cabinets are designed to deliver a big sound for live performances. Both cabinets have an authentic 60’s design and pack plenty of power with 300W. Available either Wiring a 4 X 12 Speaker cabinet - COLOMAR Wiring a 4 X 12 Speaker cabinet Note: For 2 speaker solutions see: Wiring a 2 X 12 Speaker cabinet. In this set of wiring diagrams, all speakers in the same cabinet are the same impedance. Voice Coil Tweeters, if used, may not be the same impedance, it depends on how they are used.