HiFi RCA Audio Switch A/B Selector, Passive Preamplifier Stereo Audio preamp Volume Adjust with ALPS RK27

TENEALAY HiFi RCA Audio Switch A/B Selector, Passive Preamplifier Stereo Audio preamp Volume Adjust with ALPS RK27

Amazon Basics 2-Male to 2-Male RCA Audio Stereo Subwoofer Cable - 4 Foot (1.2 M)

PROZOR RCA Audio Switcher 4(1)-In-1(4)-Out with Volume Control and Selection Button 4 Way Bi-Directional RCA Switcher Gold-Plated Interface Speaker Switch Box with 1.5m/4.9ft RCA Cable for Speaker DVD