Fosi Audio Box X5
- Fosi Audio
Fosi Audio Box X5
- Fosi Audio
$111.77
- Authorized Dealer · Tech Support · 30-Day Returns
Why it stands out
Best for
Not ideal for
Shop with confidence
Why buy from EMiUZEK
We help you choose, connect and maintain your system—not just ship a box.
- Authentic products
- Compatibility guidance
- Fast tracked shipping
- Firmware and driver support
- Clear warranty process
- Responsive after-sales help
Setup guide
How to connect
What you should know
EMiUZEK buying notes
Frequently asked questions
View full technical specifications
Official product information provided by Fosi Audio
The following product descriptions, specifications and images are provided by the manufacturer.
Fosi Audio Box X5 is a compact phono preamplifier for moving-magnet and moving-coil turntable cartridges.
Four selectable gain settings, precise RIAA equalization and low-noise components make it a flexible upgrade between a turntable and a line-level amplifier or powered speakers.
Why it stands out
MM and MC cartridge support
A front-panel cartridge selector and 38 / 48 / 56 / 66 dB gain settings accommodate a broad range of phono cartridges.
Precision analog signal path
OPA1612 amplification, precision film components and gold-plated RCA connections are designed for accurate, low-noise vinyl playback.
Simple system integration
Dedicated RCA input, RCA output and grounding terminal provide a straightforward connection between a turntable and a line-level audio system.
Low-noise, user-friendly analog design
An aluminum chassis, one-touch controls and dedicated grounding support make setup straightforward while helping preserve a clean phono signal.
Best for
- Turntables with MM or MC cartridges
- Vinyl systems without a built-in phono stage
- Upgrading an entry-level integrated phono preamp
- Compact desktop or living-room analog systems
Not ideal for
- Turntables that only provide USB audio
- Users needing Bluetooth or digital inputs
- Directly driving passive speakers or headphones
EMiUZEK Buying Notes
- Box X5 is a phono preamplifier, not a speaker power amplifier.
- Connect its RCA output to a line-level AUX input, powered speakers or a separate amplifier; do not connect it to another PHONO input.
- Select MM/MC mode and gain according to the cartridge manufacturer's output specification.
Frequently asked questions
Does Box X5 support both MM and MC cartridges?
Yes. It provides selectable MM/MC operation and four gain settings.
Does it include Bluetooth, USB or optical input?
No. Box X5 is an analog phono stage with RCA phono input and RCA line output.
Can it power passive speakers?
No. A separate power amplifier or powered speakers are required.
Can it be connected to powered speakers?
Yes, provided the speakers have a compatible analog line input and their own volume control.
Should I connect the turntable ground wire?
Yes, when the turntable provides one. Proper grounding helps reduce hum.
Can it be used as a normal line-level preamplifier?
No. Its gain and RIAA equalization are designed specifically for phono cartridges.
HOW TO CONNECT
Turntable to integrated amplifier
Source icon: turntable
Source: MM or MC turntable
Connection: RCA phono input + ground
Output connection: RCA line output
Target icon: amplifier
Output: AUX / line input on an integrated amplifier
Note: Do not connect the Box X5 output to another PHONO input.
Turntable to powered speakers
Source icon: turntable
Source: MM or MC turntable
Connection: RCA phono input + ground
Output connection: RCA line output
Target icon: speakers
Output: Powered speakers with analog input
Turntable to headphone system
Source icon: turntable
Source: MM or MC turntable
Connection: RCA phono input + ground
Output connection: RCA line output
Target icon: headphones
Output: Headphone amplifier connected to headphones
Note: Box X5 does not include a headphone amplifier; connect its line output to a separate headphone amplifier.
Technical Specifications
Inputs and outputs
| Feature | Specification |
|---|---|
| MM / MC RCA phono input | Included |
| RCA line output | Included |
| Turntable grounding terminal | Included |
Audio performance
| Feature | Specification |
|---|---|
| Gain | 38 / 48 / 56 / 66 dB |
| Frequency Response | 20 Hz–20 kHz (±0.015 dB) |
| THD | ≤0.009% |
| SNR | ≥92 dB |
| Operational Amplifier | OPA1612 |
Physical and power
| Feature | Specification |
|---|---|
| Dimensions | 4.1 × 6.5 × 1.4 in |
| Power Supply | 16 V / 1 A |
What's in the box, manuals and downloads
Shipping, warranty and returns
Worldwide Tracked Shipping
We provide tracked international shipping with delivery options and estimated delivery times shown during checkout.
Official Warranty Support
All products sold by EMIUZEK are genuine products with manufacturer warranty support.
Our HiFi specialists provide assistance with compatibility, setup, and technical questions.
Easy Returns
Eligible returns are available according to our return policy.
Please contact EMIUZEK before returning any product so we can provide assistance.