Fosi Audio Tube Pre-Amplifier Mini Hi-Fi Stereo Buffer Preamp 6K4 Valve Vacuum Pre-amp with Treble Bass Tone Control for Home Theater HiFi System

* NOTE: This is a preamplifier, not a power amplifier or phono preamp, can't be used for turntables or passive speakers. * RCA input to the computer, CD, phone, iPod and other player and RCA output to the digital amplifiers, active multimedia audio devices for lossless audio(The RCA cables not included). * Small compact design, with optimal integrated circuit to get powerful, dynamic and sweet sound. Tubes can be replaced by 6K4,6AK5,EF95, 5654,403B tubes. * This pre-amp improves everything detail, transparency, immediacy, richness, tone associated with your music. * Built-in Switch impact protection circuit and overheat protection circuit, long life span of this unit. All aluminum alloy shell and come with a 18-month manufacturer's warranty.