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Will increasing the cable size improve the performance quality of home theater speakers?
Wiki User
∙ 13y ago
Probably not. There are several factors that can affect the performance of speakers including the signal itself, the amplifier, the cables and the room in which the speakers are used.
There is a school of thought that says certain types of cable can have a noticeable effect on the sound quality even though test equipment monitoring the same tests is unable to record a difference. These people may be right or may not but for this answer we will ignore the un-measurable subtleties of types of cable.
In a typical home set up, speaker cables are likely to be under 10 feet long. The resistance of the cable will be up to around 0.5 ohms if the cable is a thin figure of eight style. A typical speaker is around 8 ohms so the cable resistance is just 1/16th of the total resistance. Increasing the size of the cable, even so that it has no effective resistance will affect the total resistance by only 6%. Resistance is important because it affects the amount of power being delivered to the speakers. Using thin cable will demand that the volume of the amplifier is adjusted upwards by up to 6%.
Speaker resistance isn't quite as simple as a fixed resistance. Typically, the resistance is far lower at low frequencies than high frequencies. An 8 ohm speaker may actually be as low as 3 ohms at 100 hertz (low frequency rumble). Because the cable resistance is more significant compared to the speaker resistance at these low frequencies, it is possible that there will be some small losses of low frequency. The two ways to overcome it are to increase the wire diameter or turn up the low frequency equalization just a touch.
As a sensible guide, try to use at least 0.5mm or 20AWG cable for a 10 foot run. The total resistance will be in the region of 0.2 ohms and make sure the cable is clean and firmly attached to the terminals.
Be aware that moving the speakers even a small distance in the room can have more effect on the sound than the cable. Speakers close to a corner of a room, for example, will increase their low frequency output significantly (by a factor or 2 or more in some cases). Moving a speaker closer to soft, absorbent furniture can reduce the high frequency output by 50% or more. While cables are important, speaker position can play a far bigger role in the final quality.
Wiki User
∙ 13y ago
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