Marshall speakers typically have either 1/4 inch TS (tip-sleeve) or Neutrik Speakon connectors. The 1/4 inch TS connectors are the most common type of connector found on guitar amplifiers and other musical instruments. These connectors are typically used to connect instruments or speaker cabinets to amplifiers. Neutrik Speakon connectors are also used on Marshall speakers and are a more robust and reliable connector that is often used in professional audio applications.