Best Seller | AKG HP4E 4-Channel Headphone Amplifier 3450H00010 Free Express Shipping! AKG HP4E 4-Channel Headphone Amplifier 2 x Stereo TRS Inputs, 4-Channels, Each with Volume Control, 1/8" & 1/4" Headphone Output Per Channel, Selector Switch for Each Output 1-2 more | | $129.00 FREE shipping go to store |