2 In and 2 Out Switcher Volume Controller, RCA signal switches to XLR balanced signal and no need for power supply. It provides RCA and XLR interfaces, independent L/R channel volume adjustment, which is suitable for devices with volume adjustment need

2 In and 2 Out Switcher Volume Controller, RCA signal switches to XLR balanced signal and no need for power supply. It provides RCA and XLR interfaces, independent L/R channel volume adjustment, which is suitable for devices with volume adjustment needProduct function introduction A977 passive preamp active speaker volume dual channel controller is small in size and suitable for active speakers or preamp post amp, it supports full balance or input and output of single ended signal. The product has functions of independent L R channel volume adjustment, 2 signals input and 2 signals output. It provides balanced XLR and unbalanced RCA connectors which are automatically converted to each other, with a