Excel ES-P 300 C Cartridge Moving Magnet MM ( P-Mount T4P ) ■ output voltage 4MV ■ needle pressure ± 0.25G 1.25 g of ■ playback frequency band 20-20,000Hz ■ Channel separation 20DB ■ channel balance 1.5dB within ■ needle tip 0.6Mil ■ weight 6.0G ■ T4P type P-mount cartridges (T4P) are designed to be interchangeable. A "T4P" insignia is usually present on the turntable to indicate a P-mount tonearm. So, for all practical purposes any brand below will fit and work in a T4P tonearm Specifically designed to be user-friendly, the P-MOUNT or T4P cartridge makes changing and setting-up a phono cartridge very simple, easy and fast. It takes only two steps: plug and screw. That's it. Now why is P-MOUNT desirable? Most users simply want to play and listen to records. To them a turntable is simply a means to an end. The half-inch mount turntable requires several steps to install the cartridge and several other steps to balance and align the cartridge. Balancing and aligning a cartridge are required for optimal tracking, groove retrieval and sound quality. The P-MOUNT design simplifies cartridge installation and eliminates the need for cartridge alignment. Please note: P-MOUNT cartridges are designed to be installed in P-MOUNT tonearms. They can also be used with a half-inch tonearm headshell by using a half-inch adapter. .