Trends PA-10 SE Tube Headphone/Preamp ONE bi-triode 6DJ8/6922 or 12AU7 tube as voltage amplification and TWO MOSFETs as output driver which perform the warm, comfortable tube sound and in addition, guarantee the high fidelity & sufficient driving power to the next power amplifier stage. provide TWO sets of switchable audio inputs. Besides the normal CD input, the PC/iPod input with higher gain is provided for small output PC/Mac/iPod/iPhone/iPad or Smartphone. Besides the normal audio output in the back panel, ONE headphone output in the front to drive even high-impedance audiophile-grade headphones compact design (mini-size & light weight), suitable for Hi-Fi room, living room, sleeping room or even right beside your laptop computer. a specially designed AC power adaptor with extra low ripple & noise for Hi-Fi device is bundled for continuous power supply