Fosi Audio Bluetooth Phono Preamp for Turntable Phonograph Preamplifier With Vacuum Tube Amplifier HiFi BOX X3
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Specifications
- Brand Name
- Fosi Audio
- FOSI AUDIO Model
- X3
- High-concerned chemical
- None
- Maximum Power Per Channel
- NO POWER
- Origin
- Mainland China
- Package
- Yes
- Channels
- 2 (2.0)
- Certification
- CE
- Model Number
- BOX X3
- Input
- RCA+3.5mm AUX
- Output
- Powered Speakers
- Power Adapter
- 12V/1.5A with UL PSE Level 6 energy efficiency
- Features
- Bluetooth 5.0 Preamplifier, Turntable Preamplifier, MM Phonograph, Mini Stereo Hi-Fi Pre-Amplifier, Art phono preamp, home audio Preamplifier
Product Description
Note:
Fosi Audio Bluetooth Phono Preamp for Turntable Phonograph Preamplifier Amplificador Mini Stereo Audio HiFi Tube Amplifier Box X3
Features:
Tube MM Phono Preamplifier: Converts phono signals to Line Level Signals with low-noise integrated circuits and high-quality components to remove low-frequency noise ensure clear sound quality.
Designed with grounding post to protect your turntable.Tube Preamplifier: It's also a tube preamp with 3.5mm AUX Input.
Designed and assembled by Fosi Audio from high-quality components. Great warm, smooth-sounding.
Applicable vacuum tube model: 6K4/6J1/6J1P/6J2/6J3/6J4/6J5/6AK5/6K4/6ZH1P/4.3a/4.3B/EF95 etc *In vacuum tubes, etc. You can replace the vacuum tubes to DIY your stereo system. Different tube with different sound.
Come with high quality 12V 1.5A power supply, with American UL certification, Japan PSE certification, Level 6 energy efficiency certification.
We offer 24-month warranty, and friendly customer service!
Highlight:
Model: BOX X3
Power Adapter Output: 12V/1.5A
Product Adapter Input Voltage Range: AC 100V - 240V
Output Voltage Level: 650 Mv @3mV 1kHz
SNR ≥ 70dB
THD ≤ 0.1%
Frequency Response: Standard RIAA
Product Weight: 0.71 lb/320g
Input Mode: RCA+3.5mm AUX+ Bluetooth
Package Include:
*Box X3 Phono Preamp x1
*5725W/6J1 Vacuum Tubes x2
*12V 1.5A Power Adaptor x1
*User Manual x1
Pros & Cons
Pros
- Bluetooth 5.0 and MM phono preamp in one
- Vacuum tube warmth for HiFi sound
- Compact mini stereo design
- CE certified with efficient power adapter
Cons
- Not an amplifier, needs powered speakers
- Random tube types shipped
- Mainland China shipping time
- No passive speaker direct connect
Common Questions
What inputs and outputs does the Fosi Audio BOX X3 phono preamp have?
RCA + 3.5mm AUX input, RCA output to powered speakers; requires 12V/1.5A adapter.
Is this preamp compatible with MM turntables?
Yes, MM phonograph preamplifier with Bluetooth 5.0 for turntables and HiFi setups.
What vacuum tubes are used in Fosi Audio X3?
Randomly ships 5725W or 6J1 tubes; note it's a preamp, not full amplifier.
How do I use the Bluetooth phono preamp for turntable?
Connect turntable to phono input, output to powered speakers or amp; Bluetooth for wireless sources.
Shipping details for Fosi Audio BOX X3 from Mainland China?
Includes UL PSE adapter; 10-30 days shipping with package.
Product information last updated on March 30, 2026