SP-4-MD is a 4-pole D-flange chassis connector designed for professional audio and entertainment applications. It features a thermoplastic black shell with a blue sleeve, through-hole mounting configuration, and 3/16" solder tabs for direct PCB integration. The connector is rated for 25A current capacity and incorporates industry-standard mating with UL and CUL recognized components (File no. E339831). This connector is commonly used in speaker systems, audio equipment, and professional entertainment installations where reliable signal and power distribution is required.