Douk Audio E2 - Tube Headphone Amplifier VU Meter

Practical tips 1. Due to the scarcity of components, the two Wima square capacitors come from older devices. 2. The operating voltage of E2 is 15V DC (≥ 3A). A voltage lower or higher than this value can lead to poor performance or damage. 3. The three headphone jacks cannot be used simultaneously. Please select a socket. 4. Stereo RCA and headphone outputs can work simultaneously, and the volume/gain of both outputs is controlled simultaneously. 5. The E2 uses an operational amplifier NE5532 and an operational amplifier 49720. Only the 49720 op-amp is plug-in and can be replaced with dual op amps such as 2604/2134/muses02, etc. Settings Brand: Douk Audio Model: E2 Audio input: 2 groups of stereo RCA Audio output: RCA stereo/XLR 4 pin and 6.35mm jack Frequency response: 20Hz-20kHz (±0.5dB) THD+B: 0.02% SNR: ≥ 110dB Suitable headphone impedance: 16-600Ω Headphone Output Power: Low Gain (G): 0.55W, High Gain (H): 2W RCA Output Level: Low Gain (G): 4.3V, High Gain (H): 8.4V Input Sensitivity: 2V Working Voltage: DC 15V/≥3A Dimensions (L x W x H): 95 x 92 x 50 mm Package dimensions (L x W x H): 280 x 230 x 110 mm Net weight: 1.2kg Package weight: 1.6 kg What you get: 1 x E2 Headphone Amplifier 2 x ECF801 Tubes 1 x 15V DC Power Adapter 1 x 6.35mm Jack to 3.5mm Jack Adapter 1 x User Manual