Douk Audio Vacuum Tube 5654 Preamp Headphone Amplifier Phono Preamp Home Stereo Audio

【Voltage Compatibility】 When using electrical appliances, please note that they are designed for Japanese voltage specifications (90-110V), so if you use them with a different voltage, it may cause a malfunction.

【Plug Type】 Our products use Japanese plug types (A or B type). Please use a conversion adapter if necessary.

【Important Note on Transformers and Adapters】 A transformer adjusts voltage to match your device’s requirements. A conversion adapter only changes the plug shape and does not adjust voltage. Using only a conversion adapter without a transformer may result in damage to the product.

【Liability】 We are not responsible for malfunctions or damages caused by improper use, such as operating the product without a transformer.

[About clocks that synchronize time via radio waves] The function of clocks that synchronize time via radio waves only works in the Japanese area. Please be careful. 【Vacuum Tube Preamplifier】Douk Audio T4 PRO can be used as MM phono preamplifier, vacuum tube audio preamplifier and headphone amplifier, with powerful functions in mini size, specially designed to meet different requirements of home/desktop audio system. Masu. 【MM Phono Input】Converts phono signal to line level signal, uses low noise integrated circuit and high quality components to ensure clear and clean sound. 【3.5mm AUX Input】Amplify low-level audio signals from smartphones, tablets, PCs, MP3s, etc., making it easier to drive amplifiers and active speakers, greatly improving sound quality. 【3.5mm Headphone Output and Perfect Circuit Design】The T4 PRO preamp also incorporates a classic headphone amplifier circuit (2*NE5532), which can easily drive 32-300Ω headphones. Affordable and advanced architecture, TI TPA5430 for power management, TL071 + JRC2068 phono preamp circuit, etc., let you enjoy HiFi analog sound and top-notch design at an unbeatable low cost. [JAN5654 Vacuum Tube] Imported JAN5654 Vacuum Tube and Vintage Warm Sound: Comes with JAN5654 Vacuum Tube by default, the details, clarity, immediacy, richness, dynamics, tone, etc. are all improved, especially for human In terms of voice, it's much better than the 6J1 series. [Note] 1. Priority is given to 3.5mm AUX input. If using the MM phono input, please make sure the AUX cable is unplugged. 2.Stereo RCA and 3.5mm headphone jack can be output at the same time, and the knob also controls the volume of the two outputs at the same time. Model: T4 PRO Audio input: MM phono/turntable/3.5mm AUX Audio output: Stereo L/R RCA/3.5mm headphone jack Output level: 1.5V (input 0.775V) Headphone jack maximum output: 150mW @32Ω Matched headphone impedance: 32-300Ω Input sensitivity: 0.775V Frequency Response: 20Hz-20KHz (±3dB) (AUX IN)/Standard RIAA (Phono IN) S/N ratio: -105dB THD: 0.2% Dimensions (W*D*H): 95*117*30mm/3.74*4.61*1.18in (excluding tube) Package dimensions (W*D*H): 255*215*65mm/10.04*8.46*2.56in Net weight: 330g / 0.73lb Package weight: 600g / 1.32lb packing list 1 * T4PRO Preamp 2 * JAN5654 vacuum tube 1 * DC12V power adapter 1 * 3.5mm TO RCA cable