Feature
●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 X4s 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, its a DIY opportunity worth exploring.
●What You Get: BOX X4 phono preamp, DC 12V power supply, user manual, our worry-free 24-month warranty, as well as friendly customer service.
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.
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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. |
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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 preamps 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. |
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| BOX X1 | BOX X2 | BOX X3 | BOX X4 | P3 | P2 | |
| Customer Reviews |
1,142
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2,451
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| Price | $39.99 | $69.99 | $79.99 | $89.99 | $79.99 | $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 |
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| V1.0B | TDA7498E | BT10A | BT20A | SK01 | TB10A | |
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| Customer Reviews |
729
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1,291
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3,411
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8,047
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67
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1,993
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| Price | $49.99 | $59.99 | $49.99 | $79.99 | $79.99 | $79.99 |
| 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 |