Sell [Activity Price] 5.0 Tube Headphone Preamp Amp Preamp, Treble, Bass Adjustment best price

Description: The preamp has BT 5.0 audio receiving function. BT chip QCC3008 supports APTX and has low latency. Wireless connection is available within 10 meters. 3.5mm headphone amplifier interface is compatible with ordinary 3.5mm headset. Components uses JRC4556 high power output chip and buffer headphone amp circuit. Headphone Power Output: 30mW@16R, 50mW@32R, 70mW@68R, 70mW@150R. Built-in ESS9023 decoding chip, supports 24Bit sample rate, which integrates a 2Vrms output driver op amp, and has low power consumption. 6K4 tubes can be replaced by 6J1, 6J4, 6AK5 tubes for different listening experience. OP amp 0PA1656IDR can also be replaced by AD827 or MUSE02. Low Noise: Power supply circuit is separated from other components. With shielded function, interference and noise will be minimized and sound quality will greatly improved The LED indicator in front panel show the input. Red LED for RCA input, and blue for BT input. Short press SELECT button can change the signal input. Signal switching uses relay switch which is better than analog power switch. Specification: Chipset: QCC3008+ESS9023+GE5654+OPA1656IDR +JRC4556 Frequency Response: (±3dB)20Hz-22KHz Input: BT 5.0, APTX, RCA Output: RCA, 3.5mm Headphone Amplifier Line Output Impedance: Up to 600R Headphone Output Impedance: 16-150R Line Input Impedance: 600R-20K Headphone Power Output: 30mW@16R, 50mW@32R, 70mW@68R, 70mW@150R Sensitivity: 0.775Vrms RCA RMS Level: 2Vrms Bass/Treble Gain: ±8dB Power Supply: 12V 1A Unit Weight: 0.4kg Unit Size: 98x148x33mm/3.85 x 5.82 x 1.3 in Package Includes: 1 * Preamplifier 1 * Power Cable 1 * Amplifier Antenna 2 * Bulb 1 * User Manual Note: Color might be slightly different due to the color calibration of each individual monitor. Please allow slightly measuring deviation due to manual measurement.