Bravo V2 is a class A tube headphone amplifier. Providing clean， powerful and enjoyable sound.  No Crossover distortion! Hear what you have been missing in your favorite music!<br> <br><strong>Features:</strong><br>Tube headphone amplifier with powerful dynamic and sweet TUBE sound.<br>Pure class A Tube amp， no op amp IC and  low voltage.<br>Parallel 3.5mm and RCA stereo inputs and 6.35mm Output.<br>Cute and Beautiful looking， Powerful for any Headphone.<br>Can be used as a headphone amp or a pre-amplifier.<br><br><strong>Specification:</strong><br>Brand: Bravo<br>Model: V2<br>Input: RCA &amp; 3.5mm Jacks<br>Output:  6.35mm Jack<br>Power Adapter: US Plug<br>Input Power: DC24V<br>Input Sensitivity: 100mV <br>Input Impedance: 100KOhm<br>Output Impedance: 20~600 Ohm<br>Gain: 30dB<br>Frequency Response: 10Hz-60KHz +/- 0.25dB<br>Signal/Noise Ratio: &gt;90dB<br>Dynamic range: 84.6dBA(300 ohm) 89.8dBA(33 ohm)<br>MD + Noise: 0.045(300 ohm) 0.42(33ohm)<br>Item Size: 10 * 8 * 7.5cm / 3.9 * 3.1 * 2.7in<br>Item Weight: 177g /6.2oz<br>Package Size: 14 * 14 * 11cm / 5.5 * 5.5 * 4.3in<br>Package Weight: 566g / 20oz <br><br><strong>Note:</strong><br>The tube needs about 30s to be warm-up before working properly.<br><br><strong>Package List:</strong><br>1 * Headphone Amplifier<br>1 * Power Adapter (US)<br>1 * User Manual (English)