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Photo: 2.5 mm mono (TS), 3.5 mm mono and stereo (TRS), and 1 ⁄ 4 inch (6.4 mm) stereo (TRS) phone connectors The most common microphone connector in consumer use is the venerable phone connector, in 1 ⁄ 4 inch (6.4 mm), 3.5 mm, and 2.5 mm sizes, and in both mono and stereo configurations.
The 2.5 mm or sub-miniature sizes were similarly popularized on small portable electronics. They often appeared next to a 3.5 mm microphone jack for a remote control on-off switch on early portable tape recorders; the microphone provided with such machines had the on-off switch and used a two-pronged connector with both the 3.5 and 2.5 mm plugs.
Phone connector also known as tip-ring-sleeve (TRS) or tip-sleeve plug, phone plug, jack plug, mini-jack, and mini-stereo. This includes the original 6.35mm (quarter inch) jack and the more recent and standard 3.5mm (miniature or 1/8 inch) and 2.5mm (subminiature) jacks, both mono and stereo (balanced) versions. [2]
Stereo audio applications use either black and red, grey and red, or white and red RCA connectors; in all three cases, red denotes right. White or purple may also be replaced by black. Some older tape recorders, and equipment like receivers designed to connect to them, use a 5-pin DIN connector to connect left and right for record and playback ...
Patented on March 29, 1988, a cassette tape adapter is a device that allows the use of portable audio players in older cassette decks.Originally designed to connect portable CD players to car stereos that only had cassette players, the cassette tape adapter has become popular with portable media players even on cars that have CD players built in.
The decibel unloaded reference voltage, 0 dBu, is the AC voltage required to produce 1 mW of power across a 600 Ω impedance (approximately 0.7746 V RMS). [2] This awkward unit is a holdover from the early telephone standards, which used 600 Ω sources and loads, and measured dissipated power in decibel-milliwatts ( dBm ).