The plc21 passive line combiner by lambden audio is perfect for musicians and audio professionals seeking reliable signal mixing in studios or live environments'. '.strtoupper('t')his passive single channel unit combines two balanced xlr inputs into a single output making it easy to merge sources like microphones or instruments'. '.strtoupper('b')uilt with durability in mind the plc21s die cast aluminium housing is prepared to endure rigorous studio sessions or heavy touring schedules.the plc21s design includes a transformer that isolates each input and output ensuring crystal clear audio and protecting against interference'. '.strtoupper('p')lus the earth lift switch lets you eliminate unwanted noise on demand offering an even cleaner output'. '.strtoupper('w')ith no power required this versatile unit is ideal for dynamic microphone combinations from percussion to choir arrangements and more.