The PM52 is for connecting headphones to a speaker line. The 1/4" Mono/stereo loop jacks are for connecting many boxes in series. There are 2 headphone jacks and volume control. The PM52 uses the speaker line signal for power, and uses no batteries.

MPN: PM52
UPC: 675889005202

• Converts speaker level signals to headphone level
  
• Mono/Stereo mode
  
• Power Amp loop through
  
• No external power or batteries required.
  
  
• PLEASE NOTE: THE PM52 REQUIRES A MINIMUM OF A 10 WATT AMPLIFIER TO FUNCTION PROPERLY.
  
• Input Impedance: 150 Ohms
  
• Size: 2.25" x 2.5" x 1.25" (5.7 x 6.3 x 3.2 cm)
  
• Weight: 1lb (.45 Kg)