The PM55P With built in Optical Limiter is designed for performers who need to monitor their own signal, such as their vocal, with the main mix. The unit has become very popular with drummers who need to mix a click with a monitor signal. And many sound technicians use the PM55P as a quick line tester to troubleshoot audio systems. Operates on either one 9 volt battery or the included PS27s power supply.
 
Specifications
Max Input Level: -20 dB XLR, 40 dB monitor
Input Impedance: 600 Ohm Mic, - 22k Ohm Monitor
Output Impedance: 10 Ohms
Gain: 20 dB 1/4", 50 dB XLR
Bandwidth: 50 - 20 kHz
S/N Ratio: 90 dB
Limit Threshold: 0 dB
Current Draw: 70 Mils Nominal
Max Output Level: 100 Mil Watts @ 16 Ohm.
Power: 9 - 15 VDC
Size: 4.5" x 4" x 1.375"
Weight: 1 lb (.45 Kg)
Built in switchable Optical Limiter
XLR Mic In & Pass Through
Ground lift on XLR signal
Stereo/Mono 1/4" Monitor Input
3.5mm and 1/4" Headphone outputs
Powered by one 9 volt battery or the included PS27s power supply
Lots of output level, it's loud