<b>Notice:</b><br>The toggle on the front panel is to switch between speaker and headphones. Please connect your speakers (both 4Ω and 8Ω) to 8Ω and 0Ω posts.<br>Please make sure all tubes are fully inserted before powering on the amplifier. Otherwise the amp may be burned.<BR> <br> <p><b>Specifications:</b></p> <ul> <li>Output power: 6.8W * 2</li> <li>Frequency response: 20Hz-20KHz</li> <li>Input impedance: 100K ohms</li> <li>Output impedance: 4/8Ω</li> <li>SNR: 90db</li> <li>Input Sensitivity: 500mv-2000mv</li> <li>Harmonic distortion: 1% (1KHz)</li> <li>Tube: 5U4C * 1 + 6H8C * 2 + 6P1 * 4</li> <li>Operating voltage: 110V</li> <li>Weight: about 7 kg</li> <li>Size: 260mm * 215mm(including terminals and knobs 260mm) * 150mm (W*D*H)</li> </ul> <BR><p><b>Package includes:</b></p> <ul> <li>Finished tube amplifier ×1</li> <li>Power cable ×1</li> </ul>