Headphone amplifiers with 6.35 mm input
Jack (6.35 mm)
— a full-size analogue of the 3.5 mm mini-Jack interface (see the relevant paragraph), used in a similar way — to connect an analogue audio signal. Relatively bulky, which is why it is installed mainly in stationary amplifiers (see "Type"), although there are also portable models with similar inputs. On the other hand, the large size provides a more reliable and noise-resistant connection than the mini-Jack; this is one of the reasons why a full-size jack is considered to be the preferred choice for high-end audio applications.The second reason is that the 6.35mm inputs can be used for either a standard connection (both stereo channels on one jack format) or a balanced connection. For more information about such a connection, see p. "XLR" (in the same list), here we note that it is great for professional use, but requires a separate connector for each sound channel. So support for balanced connection is not mandatory for amplifiers with Jack inputs, this feature should be specified separately.
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