Audio-video accessories connect cables to devices and provide space to store equipment. Audio-video cables have connectors compatible with speakers, televisions, computers, monitors, and other receivers. Audio-video cable connectors connect cables from cable boxes or stereos to display on a monitor or play on a speaker. Audio-video splitters and adapters transmit cable signals to equipment and devices with different connection types. Audio-video racks hold and store A-V equipment and keep parts and components neat and organized. Audio-video rack shelves and expansion kits include components for building racks to secure relays and equipment. Audio-video scalers, converters, and switches convert video and audio signals from a single device and display it on another. Audio-video switches and extenders boost signal strength of equipment and improve broadcast range. Audio-video modular switches and extenders display output from multiple devices onto single monitors or television screens.