The Rolls PS16 Personal Monitor Power Center supplies the DC power and distributes the Monitor signal to up to ten PM50s, PM50sOB, or PM350 units. This dramatically increases efficiency and eliminates the need for multiple wall-warts and adapter cables. Both the power and monitor signals are carried from each PS16 output to the Monitor input of the PM50s, sOB and 350 using an ordinary 1/4" stereo TRS cable . By using stereo "Y" adapters, up to ten of the Personal Monitor Amplifiers may be daisy-chained.