New Out-of-Stock 4 Channel Portable Stereo... 0 Review(s) Price $50,000 4 Channel Portable Stereo Headphone Amplifier - Professional Multichannel Mini Headphone Splitter Amplifier with Balanced 4 ¼ ”TRS Headphone Output Jack and 1/4" TRS Audio Input for Sound Mixer - Pyle PHA40 BLACK shopping_cart OUT OF STOCK