![]() The metal used in these better cables are called OFC (oxygen free copper) or HC-OFC (high conductivity oxygen free copper). Copper oxide is a semi-conductor which distorts, resists and eventually blocks the electrical signal. But you may occasionally see four-conductor speaker wire, which is also known as quad speaker wire. The most common type of speaker wire is two-conductor, or zip cord. This reduced oxygen cable is more stable over time because with less oxygen – it is inherently resistant to corrosion (becoming oxidized – and turning bright orange and eventually green). What is 4 Wire Speaker Wire Used For Speaker wire is used to connect audio equipment, like amplifiers and speakers. Four-conductor wire is commonly used for whole-house wiring (multi. Green (sometimes with a Yellow stripe) is the color of an earth ground in AC wiring, so we use this green color wire as Negative, which leaves White or Yellow color wire for the Positive connection. The more quality in-wall speaker cables utilize higher purity coppers coppers which are contaminated with fewer other metals and made with a process that reduces the amount of oxygen that is present in the molten metal. This leaves the right speaker with the green and white (or yellow) conductors. It’s typically better than doorbell wire, but there is still better wire out there. ![]() This is also the type of copper that inexpensive inwall speaker cables use. Most “emergency cables” that are provided free with inexpensive equipment use this type of copper. Because that sounds almost as appealing as dirt – most companies that use it call it something like high purity copper. The next level is referred to in the industry as tough-pitch copper. It’s great for door bells, but not good enough for audio reproduction. It is pure copper cable and is rated up to 10 amps. Each conductor is 1cm wide and it’s 18 AWG wiring. Other in-wall cables, such as doorbell wire and electrical wire (Romex) are made with electrical grade wire. By including 4 wire conductors you can run this to the bi-poles on your speakers and hook it up. There are a number of different price/performance levels of copper.
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