Because so many cable shoppers assume higher price means higher quality, cable makers and marketers are naturally willing to sell to their assumptions. To justify their monstrous prices cables are often sold using very convincing descriptions and flashy photos, but no verifiable data about a cable's electrical specifications are ever offered.

Emphasis on conductor size is often used to mislead cable shoppers and waste enormous amounts of copper. For example, you will find many audio cables with thin conductors offering lower (better) capacitance than cables with thick conductors, so you have to watch the electrical specifications, not the conductor size. Instead of relying on "more is better" to sell cables, A2Z Cables has chosen to focus on selling cables that meet or exceed the electrical specifications of their intended purpose.

This is one of those 'How long is a piece of string?' questions because the answer depends on both the cable type and on the impedance of the circuitry at either end. As a very general rule, high-impedance mics or feeds from high-impedance instrument pickups shouldn't be longer than around four or five metres, as the cable capacitance can cause the high frequencies to be attenuated, but low-impedance balanced mic cables can be tens or even hundreds of metres long if the sending and receiving devices are designed properly and the source impedance is very low. With semi-pro equipment, keeping balanced mic or line cables down to 10 or 20 metres maximum would be sensible, though it's still best to keep all cable runs as short as you can.