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Our pick of the best AV receivers: brilliant home cinema amplifiers.That's because it has greater bandwidth available, meaning it can support higher quality audio up to 24-bit/192kHz. An entry-level cable like the QED Performance Coaxial will do a fine job for most.Ĭoaxial might not be as widespread as its rival optical connection these days, but you'll still find it at the back of certain AV receivers, integrated amplifiers and TVs.Īnd, in our experience, compared to optical, a coaxial connection does tend to sound better. They look similar and can work, but an analogue interconnect has different impedance values from a digital one (50 ohm versus 75 ohm), so won’t work as well. But don’t be tempted to try and use a standard RCA phono cable in place of a dedicated coaxial digital cable.