Tube phono preamplifier for turntables Exceptionally Low Noise Level Converts phono signals into line-level signals with low-noise integrated circuits and high-quality components, eliminates low-frequency interference and ensures clear sound quality. With earth connection to protect your turntable. Three Gain OptionsWith its three switchable gain modes: 39, 42 and 45 dB, this phono preamplifier allows precise adjustment of volume and sound quality for optimal indoor use. Whether you're enjoying your vinyl collection in a quiet study or a lively living room, you'll find the perfect gain setting to enhance your listening experience. Exchangeable Tubes This tube phono preamplifier delivers an exceptionally warm and smooth sound and is compatible with various models of vacuum tubes such as 6K4, 6J1, 6J4, GE5654, 6AK5 and 66. Customise your audio system by simply swapping vacuum tubes to explore and enjoy unique sound profiles as different tubes produce different audio characteristics. Versatile Audio ConnectivityThe BOX X2 tube phono preamplifier offers an MM turntable input and 3.5mm RCA/AUX options for various audio inputs. With a dedicated RCA line output for active speakers, you can connect a power amplifier via the RCA output and then connect passive speakers for an immersive audio experience What`s in the boxBox2 Phono Preamplifier x 1 Vacuum tubes x 2 12V 1.5A power adapters x 1 RCA cable x 1 User manual x 1

Tube phono preamplifier and headphone amplifier Phono preamplification Improved audio quality Versatile connection options The updated version for BOX X2, next generation phono preamplifier for unrivalled sound quality. Enhance your vinyl listening experience with the Fosi Audio BOX X4 phono preamplifier. This compact device acts as a bridge between your turntable and your sound system, amplifying the weak signal from your turntable to a level that is compatible with your amplifier or receiver. So you can realise the full audio potential of your records and be sure to hear every detail. JAN 5654W Tube MM Phono Preamplifier The BOX X4 Phono Preamplifier supports 3.5mm AUX and MM turntable inputs and converts phono signals to line-level signals with low-noise integrated circuits and high-quality components to remove low-frequency noise and ensure clear sound quality. With an earth connection to protect your turntable. Tube headphone amplifier and phono preamplifier The BOX X4 is equipped with a 3.5mm AUX headphone and RCA output, which is extremely useful beyond imagination. Variable vacuum tube model 6K4 / 6J1 / 6J4 / GE5654 / 6AK5 / 66 vacuum tubes etc. You can replace the vacuum tubes to tune your stereo system to your own taste, different tubes provide different sounds. Phono pre-amplification Amplifies the weak signal from your turntable to a level compatible with your amplifier or receiver, allowing you to hear the full audio potential of your records. Improved audio quality High-quality components and low-noise circuitry minimise unwanted noise and ensure a clear and detailed sound. In addition, bass and treble controls allow for customised sound adjustment. Versatile connection options Provides a variety of connection options, including an MM turntable input, a 3.5 mm AUX input, RCA line outputs and a 3.5 mm headphone jack, ensuring compatibility with various audio setups. What`s in the box BOX X4 phono preamplifier 12 V DC power supply Operating instructions

Phono Preamplifier MM & MC Cartridge Compatibility 4 Gain Settings: 38-66dB Precision Audiophile Components Aluminum Alloy Chassis One-Touch Power & Cartridge Switch Embracethe Vintage Charm of Vinyl with Modern Precision Supporting MM/MC cartridges, BOX X5 is compatible with most turntables, along with 4 adjustable gain levels of 38/48/56/66 dB. It utilizes high-precision capacitors and resistors, ensuring minimal noise for audio purity. Intuitive RCA terminals achieve a plug-and-play experience. Input: MM/MC RCA; Output: RCASNR≥92dB; THD≤0.009% Frequency Response: 20Hz-20kHz(±0.015dB) High PerformanceThe BOX X5 phono preamp is compatible with both MM and MC cartridges, featuring 4 gain settings and an excellent precise RIAA equalization to provide a clean, direct pass-through of a signal when paired with your turntable.Audiophile-Grade ComponentsThis preamp utilizes a variety of materials such as 2% Precision Polyester Film Capacitors, Green Sleeve Copper Lead Audio Capacitors, 0.1% High-Precision Film Resistors, OPA1612 Op-Amp, Gold-Plated RCA Jacks, and more.It picks up subtle and finite detail produced from it and delivers a truly warm and inviting sound.Multiple Gain Settings With 4-Level gain adjustment Asettings of 38/48/56/66dB, the preamplifier accommodates both MM & MC cartridge types, meeting a variety of needs. This enhances your phono stage and helps in rebuilding the vintage stereo sound.Mini and ExquisiteIt's built around a minimalist yet functional design featuring an all-aluminum alloy chassis. When paired with the V3 stereo amplifier, the BOX X5 can bring out the best in your vinyl playback, enhancing its frequency response and dynamic performance.User Friendly DesignIt has an easy-to-use one-touch power button, gain control, and a convenient toggle switch to switch between MC and MM cartridges. In addition, the grounding port ensures that the connection is secure. Specifications Input Mode: MM+MC RCA Output Mode: RCA THD: ≤0.009% SNR: ≥ 92dB Device Dimension: 4.1 x 6.5 x 1.4 inches Power Supply: 16V/1A What‘s in the box？ BОX X5 Phono Preamp x 1 16V 1A Power Adapter x 1 User’s Manual x 1