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-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) - 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 channelsSpecification: - 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 2.1inchPackage Includes:2 in and 4 out power amplifier and sound switcher