SORINA 6K4 Vacuum Tube Preamplifiers, 3-Band Adjustable HiFi Tube Amplifier

SORINA 6K4 Vacuum Tube Preamplifiers, 3-Band Adjustable HiFi Tube Amplifier

• Tube Warmth — This upgraded preamplifier board uses 6K4 vacuum tubes and a Class A-style circuit to add warmer tone, smoother transients, and subtle harmonic richness to line-level audio.
• Line-Level Tube Buffer — Designed for CD players, DACs, streamers, phones, TVs, mixers, and phono preamp outputs. It adds tube character to the signal chain.
• Clear Signal Path — Yellow film capacitors, green filter capacitors, and a compact PCB layout support clean audio coupling and stable operation for everyday audio listening.
• Convenient Volume Control — The large front knob makes level adjustment easy during operation, so you can integrate it smoothly into home stereos, desktop systems, and DIY builds.
• Flexible DC Operation — Works with DC 12V–16V power supplies. For best results, use a clean regulated power supply rated for 1A or above. Turntables must be connected through a phono preamp first.
• Hi-Fi Audio Performance: This Tube Amplifier features a Hi-Fi boost switch. The switch is set to“Hi-Fi”at the far left; moving it one notch to the right selects“Boost 1,”and another notch to the right selects“Boost 2.”
• Professional Support & Reliable Service：We provide 7×24 hours after-sales service and focus on customer experience and satisfaction. If you have any questions or quality issues about this tube preamplifier, please feel free to contact us for timely solutions.