Product features:Do you Have 4 Power Amplifiers and 4 sets of Speakers that need to be connected to get stuck?A Powerful Power Amplifier selector Switcher can solve the above problems,14 power amplifier gear switch rotary selection switching input, 4 groups of stereo speaker gear switch rotary selection switching output2Can use banana head interface or can accept up to 12 AWG speaker cable. Fully compatible with all types of amplifiers and speakers.3Headset 6.35mm interface provides stereo headset output, for personal listening signal monitoring, headset output independent volume adjustment.4Support 4 to 16 ohms impedance stereo speakers, each channel support power up to 300W5Input and output manual selection switch, direct insertion and direct use, switching signal is stable, there is no other interference or noise between channels6Compact design solid metal shell, easy installation, the product does not need external power supply7Simple installation: input and output plug and play easy installation, you can enjoy a different audio experienceProduct Parameters:Material: Metal iron shellColor: BlackCompatible with all types of power amplifiers and speakers.Input/output accepts heavy speaker wire or speaker pin wire through the terminal port.Connect the power amplifier to the amplifier A-B-C-D position.Connect speakers to speaker 1-2-3-4.Turn on your power amplifier stereo device and the product requires no external power supply.Input/output: 4 sets of input /4 sets of output (banana plug).Metal material, steel casing, compact size to fit any system.Channel power: Each channel supports power up to 300W.Net weight: 1.18kg.Weight including package: 1.39kg.Product size: Length 320 mm X width 110 mm X height 62 mm.Package size: L 347 mm X W 190 mm X H 73 mm.