Signal Monitoring Companion with a Built-in Limiter Step up your signal monitoring game with the Rolls PM55P Personal Monitor Amp/Limiter/Battery. Take control over your own signal with an XLR mic in, a pass-through, and monitor and headphone inputs. Then switch on the optional limiter to get your signal sitting right where you want it. The PM55P also features an included power supply as well as 9-volt battery functionality. Of course, this unit is a favorite of drummers, vocalists, and keyboardists, but it’s also invaluable as a line tester in diagnosing audio system problems.
eBay