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The AT85EP for T4P mounting is Audio-Technica's best P-mount cartridgeThis P-mount Dual Moving Magnet cartridge features: 0.3 x 0.7 mil elliptical bonded elliptical stylusAluminum Pipe Cantilever for good durabilityPlug-mount for true plug~n~play installation on linear tracking and gimble T4P turntables.
Because this cartridge plugs directly into a rectangular socket at the end of the tonearm, it is known as a "T4P" Pmount cartridge. Other mounting characteristics are that it has no exposed wires in the back and is almost always found on a linear tracking turntable.
Mounting Notes: If your turntable is linear tracking it means the whole tonearm slides several inches from side to side as opposed to the standard type usually designated 'straight' or 'S shaped' which pivots on a stationary 'hub' assembly at the right rear corner of the turntable; this is called a "gimble" mount. A linear tracking turntable will generally have buttons you must operate to move the tonearm and will almost always be found with a Pmount cartridge. This rule like many are made to be broken as some vinyl players such as programmable linear tracking turntables from the 1980s may have a built-in cartridge. As well, there are several dozen turntables in existence that have a standard "gimble" mount tonearm but require a Pmount/T4P cartridge. So, the AT85ep is generally found on linear tracking turntables, but sometimes found on gimble mount tonearms.
Myth: Often people think they must have a brand of cartridge that matches their turntable brand. This is totally unnecessary and often impossible to achieve these days. In fact, the vast majority of turntable manufacturers, had a third party cartridge manufacturer make the cartridge on their behalf. Also cartridge wiring connections usually go straight to your amplifier, receiver or computer thus allowing the turntable to make no direct electrical changes to the cartridge output signal.