Product Description Elevate Your Audio Experience with the 4-Way HiFi Tube Preamp Stereo Audio Switcher/Splitter Versatile Connectivity and Superior Sound Quality: This sophisticated tube preamplifier offers four groups of RCA inputs and dual outputs (RCA and 3.5mm headphone jack), allowing seamless audio selection and splitting without the hassle of frequent cable changes. Compatible with a variety of audio devices, including computers, smartphones, and CD players, it significantly enhances the sound quality of your audio system. Authentic Tube Amplification: Equipped with genuine Soviet 6H3N tubes, this preamp filters out the digital harshness commonly found in contemporary audio. The result is a sound that is warm, soft, and clear, with each detail vividly presented for a truly live listening experience. Complemented by the classic NE5532 operational amplifier, this preamp can effortlessly drive most headphones. Customizable Audio Control: Take charge of your music with independent tone controls for treble and bass. Adjust the specific proportions of high and low frequencies to tailor your audio experience to your preferences, whether you crave thrilling highs or deep, resonant lows. Elegant Design and Robust Construction: The preamp's compact dimensions (145x85x85mm) make it an attractive addition to any desk, while the vintage VU meters and visible tubes add a touch of classic flair. Its sturdy build, featuring a durable aluminum alloy and steel plate, ensures lasting performance. Key Features: Inputs: 4x RCA Outputs: 2x RCA, 3.5mm headphone jack Frequency Response: 20Hz-20kHz Treble & Bass Range: 6dB THD: 0.04% typical SNR: 100dB Headphone Output Impedance: 32-300 Headphone Maximum Power: 160mW/32 Package Contents: 1x 4-Way HiFi Tube Preamp 1x Power Adapter