Description: Do 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. Touch- switching input for 2 power amplifiers, touch- selective switching output for 4 stereo speakers (4 sets of speakers can be turned on or off independently) 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 switch Maximum support power per channel is 300W; Signal input provides no-load protection function of vacuum tube power amplifier signal, provide output earphone monitoring function, 6.5mm interface, earphone output with volume adjustment function 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 channels Specification: Earphone listening interface: 6.5mm Input: 2 sets of inputs Output: 4 sets of output Power: 300W Frequency response: 10Hz-50KHz Weight: 0.86 kg Size: 24 x 11.3 x 5.5cm/9.4 x 4.4 x 2.1inch Package Includes: 2 in and 4 out power amplifier and sound switcher Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.