Product descriptionDo you have trouble connecting two power amplifiers to four sets of speakers? Do you need a power amplifier to make all four speakers sound at the same time?A powerful power amplifier with a sound switcher can solve the above problems.1. Touch-tone switching input for 2 power amplifiers, touch-tone selective switching output for 4 stereo speakers (4 sets of speakers can be turned on or off independently)2. Four sets of stereo speakers can sound at the same time, or one or more sets of speakers can be turned off separately, manually selecting a push-button switch3. Maximum support power per channel is 300W4. Signal input provides no-load protection function of vacuum tube power amplifier signal5. Provide output earphone monitoring function, 6.5mm interface, earphone output with volume adjustment function6. The input and output are manually selected for switching, and directly plugged in for direct use. The switching signal is stable, and there will be no additional dryness or noise between channels7. Compact design, strong metal case, easy installation, no external power supply Product parametersCompatible with all types of power amplifiers and speakers.The input/output receives heavy speaker wire or speaker pin wire through the terminal port.Connect the power amplifier to the position of amplifier A or Amplifier B.Connect the loudspeakers to the 1-2-3-4 loudspeaker respectively.Turn on your power amplifier stereo, the product does not require external power.Earphone listening interface: 6.5mmInput: 2 sets of input (banana plug)Output: 4 sets of output (banana plug)Power: Maximum support 300WMetallic material, stainless steel case, compact size suitable for any system.Channel power: Each channel supports up to 300W.Frequency response: 10Hz - 50KHz.Net weight: 0.86 kgProduct weight after packaging: 0.98 kgProduct size: length 240mm X width 113mm X height 55mmPackage size: length 260mm X width 185mm X height 65mm high Kit list1 X 2 in and 4 out power amplifier and sound switcher, speaker, switch distributor, comparator, headset, monitoring function, audio input, 300W per channel, sound quality without loss