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Store New Arrivals Add to Favorite View Feedback Contact Box X4 Phono Preamp with JAN 5654W Vacuum Tubes for MM Turntable Phonograph Record Player with Volume Bass Treble Control Description Item model number BOX X4 Item dimensions L x W x H 4 x 2 x 1 inches Product Dimensions 4 x 2 x 1 inches; 12.8 ounces Country of Origin China Number of Channels 2 Voltage 12 Volts Is Discontinued By Manufacturer No Upgrade your home audio system with the new-generation phono preamp, the Fosi Audio BOX X2 upgraded version JAN 5654W Tube MM Phono Preamplifier: The BOX X4 phono preamp supports 3.5MM AUX and MM turntable input, converting phono signals to Line Level with low-frequency noise removal using high-quality components and low-noise integrated circuits. Protect your turntable with the grounding post feature Tube Headphone Amplifier & Preamplifier: The Fosi Audio BOX X4's versatile design includes a 3.5MM AUX headphone and RCA output, offering a range of usability beyond expectations Applicable Vacuum Tube Model: 6K4/6J1/6J4/GE5654/6AK5/66*In vacuum tubes, etc. Achieve a customized stereo system by replacing vacuum tubes. With different tubes producing unique sounds, it's a DIY opportunity worth exploring What You Get: BOX X4 phono preamp, DC 12V power supply, user manual Product Description Our Story Fosi Audio was founded with a simple goal: Build products that sound great and make people want to listen to music every day. We design, manufacture, and market many Hi-Fi audio products. We pursue your perfect music journey. Enjoy Hi-Fi music with Fosi Audio audio products! JAN 5654W Vacuum Tube Phono Preamp/Headphone Amp Product Parameters: Input Interface: MM turntable input, 3.5mm AUX input, 12V DC input Output Interface: RCA output, 3.5mm headphone output Output: Active(powered) speakers, Amplifier, Headphones Applicable headphone types: 16 Ω - 300 Ω Output Voltage Level: 1kHz and 650mV SNR: ≥ 70dB THD: ≤0.1% Frequency Response: Standard RIAA Product Adapter Input Voltage Range: AC 110V - 240V 2 Channel Power Amp: BT10A, BT20A, TB10A, TB10D, V1.0G, TDA7498E, ZK-1002, ZK-502T. 2.1 Channel Power Amp: BT30D, BT30D Pro, BL20A, BL20C, ZK-TB21. DAC: Q4, K5 Pro, DAC Amplifier: DA2120A, DA2120C. Subwoofer Amp: TP-02, M01-BT, M03, M04. Phono Preamp: BOX X1, Box X2, BOX X3, BOX X4. Tube Preamp: P1. Tube Headphone Amplifier: T20, T20X, P2, N2. Experience greater control over sound quality with the independent gain rotation design for treble and bass. This feature adds more playability and fun to your music, offering more ways to enjoy and explore. The 3.5mm headphone output interface is compatible with standard headphones, providing dedicated functionality for headphone users. Additionally, the gain interface is specifically reserved for audiophile DIY. This preamp is designed to restore sound with greater clarity. Equipped with 5654 vacuum tubes, this preamp offers a smoother listening experience, replicating the natural sound and retaining classic acoustic tones in audio equipment. The result is beautiful Hi-Fi sound quality. Furthermore, the 5654 tubes can be substituted for 6K4/6J1/6J4/6AK5/66*In vacuum tubes to cater to the specific needs of audiophiles. The record preamp is compatible with moving-magnet (MM) cartridges and features precise RIAA equalization for accurate audio reproduction. Its exceptional sonic performance ensures consistent quality, while low noise enhances the overall listening experience. This compact preamp features stereo RCA inputs and outputs, enabling you to easily connect your turntable to the preamp using the RCA inputs and ground. The preamp's power supply is equipped with short-circuit protection and overload protection features. It is designed to effectively reduce the impact of AC input for enhanced safety and stability. Add to Cart Add to Cart Add to Cart Add to Cart Add to Cart Customer Reviews 4.3 out of 5 stars 1,276 4.6 out of 5 stars 2,621 4.3 out of 5 stars 130 4.1 out of 5 stars 675 4.2 out of 5 stars 176 4.3 out of 5 stars 12 Price $39.99 $ 39 . 99 — $79.99 $ 79 . 99 $79.99 $ 79 . 99 $79.99 $ 79 . 99 $49.99 $ 49 . 99 Type Phono Preamp Phono Preamp with Vacumm Tubes Phono Preamp with Vacumm Tubes Phono Preamp with Vacumm Tubes Headphone Amp +Preamp Headphone Amp +Preamp MAX Power Output Note: It cannot be directly connected to passive speakers, but can only be connected to active speakers or amplifiers. Note: It cannot be directly connected to passive speakers, but can only be connected to active speakers or amplifiers. Note: It cannot be directly connected to passive speakers, but can only be connected to active speakers or amplifiers. Note: It cannot be directly connected to passive speakers, but can only be connected to active speakers or amplifiers. Note: It cannot be directly connected to passive speakers, but can only be connected to active speakers or amplifiers. Note: It cannot be directly connected to passive speakers, but can only be connected to active speakers or amplifiers. Input RCA RCA+3.5mm AUX Bluetooth + AUX + RCA RCA+3.5mm AUX Bluetooth + RCA AUX + RCA Output Active Speakers + Headphone Active Speakers Active speakers RCA+3.5mm AUX RCA + 3.5mm Headphone + AUX 3.5 mm + 6.35 mm Treble & Bass Control x x ✓ ✓ ✓ x THD ≤ 0.08% ≤ 0.1% ≤0.1% ≤0.1% ≤ 0.02% ≤0.03% SNR ≥ 70dB ≥ 98dB ≥70dB ≥70dB ≥103dB ≥ 95db Terminating Impedance - - - - - - Power Adapter 12V/1.5A 12V/1.5A 12V/1.5A 12V/1.5A 12V/1.5A 12V/1.5A Work Voltage AC 110V - 240V AC 110V - 240V AC 100V - 240V/ DC 12V AC 110V - 240V DC 5V AC 110V - 240V Add to Cart Add to Cart Add to Cart Add to Cart Add to Cart Add to Cart Customer Reviews 4.6 out of 5 stars 778 4.4 out of 5 stars 1,307 4.5 out of 5 stars 3,285 4.5 out of 5 stars 8,386 4.4 out of 5 stars 135 4.5 out of 5 stars 2,028 Price $49.99 $ 49 . 99 $69.99 $ 69 . 99 $49.99 $ 49 . 99 $79.99 $ 79 . 99 $79.99 $ 79 . 99 $69.99 $ 69 . 99 Type 2.0 CH Amp 2.0 CH Amp Bluetooth 2.0 CH Amp Bluetooth 2.0 CH Amp Headphone Amplifier/Preamp 2.0 CH Amp MAX Power Output 50W x 2 160W x 2 50W x 2 100W x 2 2400mW@32Ω(High Gain); 300mW@32Ω(Low Gain) 100W x 2 Input RCA RCA Bluetooth + 3.5mm AUX Bluetooth + RCA 3.5mm line in RCA Output Passive Speakers Passive Speakers Passive Speakers Passive Speakers 3.5mm line out, 3.5mm/6.35mm headphone jack Passive Speakers Treble & Bass Control x x ✓ ✓ ✓ ✓ THD ≤ 0.04% ≤ 0.04% ≤ 0.04% ≤ 0.04% <0.001% ≤ 0.04% SNR ≥ 98dB ≥ 98dB ≥ 98dB ≥ 98dB ≥108dB ≥ 98dB Terminating Impedance 2-8 Ohm 2-8 Ohm 2-8 Ohm 2-8 Ohm 16-300 Ohm 2-8 Ohm Power Adapter 19V/4.74A 24V/4.5A 19V/4.74A 24V/4.5A - 24V/4.5A Work Voltage AC 110V - 240V AC 110V - 240V AC 110V - 240V AC 110V - 240V USB-C/DC5V AC 110V - 240V ABOUT US We offer the best prices around on high quality products. 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