<b>Introduction </b><br> Douk Audio X1 tube power amplifier is the fully upgrading version in all aspects, using GE5654 vacuum tube to impove the sound quality, TDA7498E amp IC that can max output 160W+160W to drive all home speakers, integrating the function of phono preamp and amplifier to support MM phono turntables input, and adding a low frequency output that can connect active subwoofer to build 2.1 channel audio system.<br> <br> <b>Mature Circuit & HiFi Components:</b><br> Double PCB design, perfectly integrated the MM phono circuit. Reasonable and concise layout, less wiring and less noise.<br> Adopting QCC3008 Bluetooth chip, with strong compatibility and supports APTX and APTX-LL lossless transmission. <br> NE5532 op amp responsible for pre-amplification and tone control, with excellent dynamic, rich details and wide sound field. <br> Customized whole aluminum alloy case with good heat dissipation, and use Simens capacitors, NEC relay, red loop inductance, pure copper gold-plated terminas etc.<br> <br> <b>Parameters</b><br> Audio input: Bluetooth 5.0 / stereo L/R RCA / MM Phono & Turntables<br> Audio output: banana speaker jacks / Low frequency output (connect active subwoofer)<br> Bluetooth chip: QCC3008 (support APTX / APTX-LL)<br> Amp IC: TDA7498E<br> Op amp: NE5532<br> Max output power: 160W+160W(4Ω load)<br> Speaker impedance: 4-8Ω<br> Frequency response: 20Hz-20KHz(±3dB)<br> SNR: >90dB<br> THD: 0.5%<br> Input sensitivity: 0.775V<br> Treble and Bass range: ±6dB<br> Working voltage: DC 19V-35V<br> Dimensions(W*D*H): 115*166*60mm / 4.53*6.54*2.36in<br> Package dimensions(W*D*H): 320*280*80mm / 12.60*11.02*3.15in<br> Net weight: 782g / 1.72lb<br> Package weight: 1400g / 3.09lb<br> <br> <b>Packing List</b><br> 1*X1 Amplifier<br> 2*GE 5654 Vacuum Tube<br> 1*32V/5A Power Supply<br> 1*Bluetooth Antenna<br> 1*User Manual <br>