4-Channel, Clickless Serial Input Balance/Master volume Control 6-Channel, Clickless Serial Input Balance/Master volume Control 6- and 4-Channel, Serial Input Master/Balance volume Controls 6 -通道,串行输入法平衡音量控制 CONTACTOR SHROUD IEC 4 CHANNEL(S), volume CONTROL CIRCUIT, PDSO20 6- and 4-Channel, Serial Input Master/Balance volume Controls 6 CHANNEL(S), volume CONTROL CIRCUIT, PDSO24