This manual explains how to use the Mono/Stereo switching system and safety guidelines for Marshall 1960 series 4x12 speaker cabinets.
The handbook describes the Mono/Stereo switching facilities built into Marshall 4x12 speaker cabinets (models 1960A, 1960B, 1960AV, 1960BV). In Stereo mode the cabinet is split into two 8 Ω halves, while Mono mode offers selectable 4 Ω or 16 Ω inputs via a rear switch.
Safety instructions cover proper handling, wiring, and servicing: avoid damp conditions, never re‑wire internal speakers, refer all servicing to qualified personnel, and always disconnect power before connecting or disconnecting the cabinet. Additional warnings include not using both inputs simultaneously in Mono mode and ensuring correct impedance selection.
| Stereo mode impedance per side | 8 Ω |
|---|---|
| Mono mode right input impedance | 4 Ω |
| Mono mode left input impedance | 16 Ω |
| Cabinet configuration | 4 × 12 speakers |
Use the Mono/Stereo selection switch on the back of the cabinet; Stereo splits the cabinet into two 8 Ω halves, Mono lets you choose either the 4 Ω or 16 Ω input.
No, you must never use both inputs simultaneously when the cabinet is in Mono mode.