The sales of HDMI cables have reached record highs in recent years; this is solely down to the increasing popularity of High Definition devices such as flat screen televisions, Blu Ray players, games consoles and High Definition satellite TV. A huge contention surrounding HDMI cables is the cost, with cables available from under £5 many people ask the question; is it worth spending upwards of £50 on a HDMI cable? After all the signal is meant to be digital and made from 1 and 0's. This question has caused many a discussion in the technical press with some of the biggest selling audio visual magazines saying yes it is worth spending more and other areas of the AV media saying save your money and buys a cheap cable.
In my opinion, there are a couple of factors you should consider. The most important of which is length. HDMI cables, like all cables suffer from Electrical Magnetic Interference (EMI). This means the lead acts like an aerial and picks up interference from other cables or electrical devices in the near vicinity. This interference may manifest as ghosting or sparkles on the screen, it may even cause the picture to judder. You can reduce the effects of EMI by choosing cables that offer shielding. Shielding often comes in the form of aluminium foil wrapped around the inner cables. Another method of reducing EMI is by the use of Ferrite Suppressors, these are round coils placed on either end of the cable.
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