Linconn's AJ/AP series offers industry-standard ¼-inch (6.35mm) headphone plugs and jacks for diverse applications spanning musical instruments, professional audio equipment, and audio test instruments. Configurations include mono (TS), stereo (TRS), and switch-equipped (TRRS) terminals. Plugs feature all-metal housings or durable plastic insulation, with precision spring contacts ensuring long-lasting, stable connections. Panel-mount receptacles incorporate reinforced locking nuts for withstanding frequent insertion/removal cycles. Their broad compatibility, rugged construction, and reliable performance establish them as universal standards in the audio industry.