The majority of guitar speakers are available in a choice of 8 and 16 Ohm impedances. However, the way in which multiple speakers are wired (in a 4 x 12″ cabinet for instance) determines the overall impedance of the speaker system. Hence wiring is critical.
Wiring Diagrams It is important to match the speaker load with your amplifier's output impedance for a couple of reasons. One reason is that you will get maximum transfer of power.
How to properly wire a 4x12 speaker cabinet. In essence, there are two ways to wire up a 4 speaker cabinet that both wind up with the cabinet having the same impedance as any one of the individual drivers, or in other words, a cabinet with four 8-ohm speakers that ends up with a total cabinet impedance of 8-ohms.
The Plug and Play eliminates the confusing switch found on most stereo cabinets. Just pick your impedance and plug in. Label is set at the common 4/16 Ohm Mono and 8 Ohm Stereo. Ready to install with a steel dish, wires, and speaker connectors.
The diagram below shows the wiring of a Marshall ® 2x12" speaker cab having a Mono/Stereo selection switch and two specialized input jacks. When the Mono/Stereo switch is set to "Mono", the two 8Ω speakers are wired either in series (making a 16Ω cab) or in parallel (making a 4Ω cab), depending on which jack you use.
Since 1992 Avatar® Speakers has been known for building and selling great sounding, high value, guitar and bass guitar speaker cabinets. All of our cabinets are made to order in our own shop and are loaded with the best speakers in the world from manufacturers such as Celestion, Fane, Eminence and Hellatone.