![]() ![]() Wiring two guitar speaker cabinets in parallel Let's take a look at each method, along with what happens in terms of the total load and power handling capability with each guitar cabinet wiring approach. With both parallel and series wiring of multiple speakers, the total impedance load changes compared to running a single speaker. ![]() To simplify things, you should generally stick to using speakers with the same nominal impedance, sensitivity, and power handling capacity.Ī two-speaker guitar cabinet can be wired in one of two ways - either in parallel, or in series. Things start to get more complex when you're dealing with a guitar cabinet that is loaded with more than one speaker, in terms of impedance, power handling capacity, and wiring. Wiring guitar cabinets with multiple speakers In general, you want the power handling to at least equal the output power of the amp, but excess power handling capacity won't hurt anything - I have a speaker with a 200W rating in one of my 20W amps, and it works just fine. When one 8 ohm speaker is in the cabinet, you have an 8 ohm load, and likewise, the power handling of the cabinet is the same as the power handling rating of that single speaker. With single speaker guitar cabinets, the speaker cabinet is rated the same as whatever the impedance and power handling ratings are for the single speaker. If your amp has one of these features, it's important to make sure you're using the right setting or correct jack for whatever speaker load you have connected. Sometimes an guitar amplifier will have a switch that allows you to match the amp's speaker output to speaker cabinets of different impedances, or possibly multiple speaker output jacks for different loads. If it says "8 ohms minimum", you should never connect a 4 ohm load. It is important to always heed the manufacturer's recommendations since an incorrect speaker load can damage the amplifier. There is usually also some information about the minimum impedance load the guitar amplifier can safely handle marked on the amp somewhere near this jack. Many guitar amps have a 1/4" jack that is labeled "speaker out" or something similar. Connect the white wire to the + terminal on the speaker, and the black wire to the - terminal lug. When wiring up a guitar speaker cabinet, it's important to use heavy gauge " speaker wire" and not the thin-gauge wire you'll find inside guitar cables! In most commercially-built guitar speaker cables, the white wire is usually "hot" and is connected to the "tip" of the speaker cable plug, and the black wire is neutral and is connected to the plug's sleeve. Many guitar speakers have two lugs for each to facilitate the more complex wiring configurations that we'll describe momentarily, and if yours does, you can feel free to use either lug. The positive speaker terminal is usually marked in some way usually with a + symbol or some red paint. Make sure the guitar amplifier is turned off and unplugged and just attach the positive wire to the positive terminal on the speaker, and the negative lead to the other terminal, and you're done. Other than any challenges posed by the guitar speaker cabinet itself, mounting a new speaker and wiring it in is easy. Some single speaker combo amps have two non-detachable wires that come out of a grommeted hole in the chassis that are designed to connect to the speaker. Guitar cabinets with just one speaker in them are relatively easy to wire. We'll also look at how the various wiring methods can change the impedance load presented to the amplifier. We'll start with the simplest configuration - a single speaker - and move up to two-speaker and then four-speaker guitar cabinets. So in this article, we're going to go over the basics (with as little theory and as few mathematical formulas as possible) of the main ways of wire a guitar speaker cabinet. Phil O'Keefe | JSeries, parallel, and series-parallel, and their effect on impedance By Phil O'KeefeĪre you wondering how to wire a guitar speaker cabinet? Every so often someone will ask a question on the forums regarding wiring guitar speaker cabinets, and rather than repeating myself in multiple forum posts, I thought an article that I could link to would make more sense. ![]()
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