There are two ways you can wire a 4x12 or 4x10 for that matter the main one is seriesparallel. Connecting the two voice coils of each driver in series to and the drivers themselves in parallel to etc will result in the following impedances.

Dual Voice Coil Dvc Wiring Tutorial Jl Audio Help Center
8 ohm wiring diagram. The extra terminals give you more options for wiring the speaker. The recommended speaker impedance ratings are usually listed above the speaker wire posts. Two 8 ohm speakers in parallel is equal to 4 ohms total that the amp will see. Subwoofer wiring diagrams for 1 ohm 2 ohm 4 ohm and 6 ohm dual voice coil subwoofers and for 4 ohm and 8 ohm single voice coil subwoofers. Two 16 ohm speakers 8 ohm load. One or all of the wiring options shown in this application may not be compatible with your amplifier because of low impedance loads.
Summary printable speaker wiring diagram click on the image to enlarge it or click here for the adobe. The diagram below shows the wiring of a marshall 2x12 speaker cab having a monostereo selection switch and two specialized input jacks. If your amp is not specified for 4 ohms some are 6 ohms or 8 ohms minimum then you should consider wiring your two speakers in series. Subwoofer voice coils usually come in 2 ohm 4 ohm or 8 ohm impedances. Two 2 ohm speakers 4 ohm load two 4 ohm speakers 8 ohm load. Wiring configuration for 2 speakers in series.
Below are the available wiring diagrams for the speaker configuration you selected. A home stereo for example may often list 6 16 ohms as being ok for use. Also attempting to wire two 8 ohm speakers in parallel to an 8 ohm stereo would have the same effect. Impedance is the amount of electrical resistance or load a sub puts up against an amplifiers output. Please check your amplifier. 4 x 16 ohm speaker 16 ohm load back to guitar tech celestion unit 111 claydon business park great blakenham ipswich ip6 0nl united kingdom.
The are two basic ways of connecting two speakers together either in series or parallel. Two dvc drivers with voice coils in series parallel. The resulting impedance ohm load is considered the nominal impedance seen by the amplifier. Two dual voice coil speakers in series parallel. The impedance of a subwoofer coil is expressed in ohms. 4 x 8 ohm speaker 8 ohm load.
View our speaker wiring configuration diagrams to properly match speaker load with your amplifiers output impedance to get maximum transfer of power. When the monostereo 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.