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.
The PM52 requires a 10 Watt amplifier (minimum) to function properly.
- Input Impedance: 150 ohms
- Dimensions: 2.25" x 2.5" x 1.25" (5.7 x 6.3 x 3.2 cm)
- Weight: 1 lb. (0.45 kg)