When exposed to air, pure copper reacts to creating copper oxide which covers the exposed surface this creates a barrier between the cable and the speaker/ amplifier therefore can weaken connections. However, copper does oxidise so it needs to be well covered and insulated. The below table illustrates suggested cable lengths that will ensure your cable has a resistance less than 5% of your speaker’s nominal impedance given differing gauge measurements.Ĭopper is the most widely used material for speaker cable due to its low cost and low resistance.
It is therefore a combination between speaker impedance, length and gauge that affects the resistance. The thicker a wire or the lower the gauge, the less resistance. The cross sectional area of the wire is referring to the thickness, or gauge, of the wire. It’s also important that the wire lengths to both speakers are the same to ensure they both have equal impedance values. The trick here is to minimise wire lengths where possible but still ensure your speakers are positioned apart (if you missed out on our speaker positioning guide, shame on you! Read it here). The shorter the wire is, the less resistance it will have. Resistance is affected by two key aspects: wire length and the cross sectional area of the wire. Generally speaking, resistance starts to have an effect on the performance of a speaker when resistance is greater than 5% of the speaker’s impedance. Low-resistance wire allows more of the source’s power through to the speaker coil, meaning more power and more sound. Resistance is by far the most important property to look at. It has three key electrical properties: resistance, capacitance and inductance. Speaker cable is the wire used for the electrical connections between speakers and amplifier sources.
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So rather than poking our nose between these two opposing camps and risk getting dragged into the ongoing battle, lets elude the heated quarrel and instead offer up an overview of speaker cable jargon and give you some useful tips on how to buy your own. Other enthusiasts save their cash buying budget cables and claim that they make no difference to the sound quality whatsoever. Some argue the quality of speaker cables is just as important as the quality of the Hi-fi components they’re connecting. The age old argument of cable quality has raged between audiophiles since the dawn of time (well not really, but certainly for quite a while).
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