ROLLS PM50s Personal Monitor Amp

• Inputs: -20 dB max XLR 1K balanced, 20 dB monitor
• Outputs: 1/4", and 1/8" (3.5mm) 8 ohm or greater
• Gain: 20 dB 1/4", 50 dB XLR
• Bandwidth: 20 - 20K Hz
• S/N Ratio: 90 dB
• Power: 9-18 VAC/DC, 9-24 VDC
• Size: 3" X 2.5" X 1.25"
• Weight: 1 lb (.45 kg)
• Current drain 60ma nominal no load 15vdc

SPECS:

• XLR Mic In & Pass Thru
• Ground Lift on XLR Thru
• Mono or Stereo 1/4" Monitor Input
• 1/4" and 1/8" Phone Outputs 
• Lots of output level, it's loud

The PM50 is the "more me" box. It allows you to mix a mic signal and a monitor signal and hear them via headphones.