How to adjust speaker volume (BOX X1)？

The speaker volume is controlled through the volume knob on the speakers.

Is the DC input jack center-negative or center-positive (BOX X1)?

It is a center-positive connector.

What is the gain (in dB) of BOX X1?

The gain of the BOX X1 is 35 dB.

Can this be used with a moving coilcartridge?

No,this is a MM phono preamp only.

Can this work with my turntable andheadphones?

Yes,The BOX X1 is designed with 3.5MM headphone output.

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Fosi Audio Box X1 Phono Preamp for MM Turntable Mini Stereo Audio Hi-Fi Phonograph/Record Player Preamplifier with 3.5MM Headphone and RCA Output with DC 12V Power Supply

Fosi Audio Box X1 Phono Preamp for MM Turntable Mini Stereo Audio Hi-Fi Phonograph/Record Player Preamplifier with 3.5MM Headphone and RCA Output with DC 12V Power Supply

Product ID: 483417882

Details

Item dimensions L x W x H
18 x 13 x 6
Manufacturer
Fosi Audio
Maximum supply voltage
240 Volts
Minimum supply voltage
12 Volts (DC)
Voltage
12 Volts

🎧3.5mm headphone & RCA outputs

🔌12V DC power adapter included

🎚️70dB SNR ultra-low noise

Description

🎶 Elevate your vinyl game — because your records deserve the spotlight!

PLUG PLAY POWERHOUSE - Includes a high-efficiency 12V DC adapter ensuring stable, energy-saving performance every session.
COMPACT RUGGED ELEGANCE - Sleek steel black anodized case fits any modern setup while delivering durable, reliable hi-fi performance.
DUAL OUTPUT FLEXIBILITY - Simultaneously connect powered speakers and headphones via RCA and 3.5mm outputs for ultimate listening freedom.
CRYSTAL CLEAR VINYL REVIVAL - Transforms MM turntable signals into pristine line-level audio with ultra-low noise for flawless playback.
PRECISION RIAA EQUALIZATION - Engineered to exacting RIAA standards for authentic, warm, and smooth sound that vinyl lovers crave.

The Fosi Audio Box X1 is a compact, ultra-low noise phono preamp designed for MM turntables, featuring a 70dB signal-to-noise ratio, precise RIAA equalization, and dual RCA plus 3.5mm headphone outputs. Powered by a reliable 12V DC adapter and housed in a sleek anodized steel case, it delivers warm, high-fidelity sound that seamlessly integrates vinyl into any modern audio setup.

Specifications

ASIN	B08TLRPMDC
Best Sellers Rank	#16,951 in Electronics ( See Top 100 in Electronics ) #6 in Home Audio Preamplifiers
Brand Name	Fosi Audio
Customer Reviews	4.4 out of 5 stars 1,945 Reviews
Item Dimensions	18 x 13 x 6 centimeters
Item dimensions L x W x H	18 x 13 x 6 centimeters
Manufacturer	Fosi Audio
Maximum Supply Voltage	240 Volts
Maximum supply voltage	240 Volts
Minimum Supply Voltage	12 Volts (DC)
Minimum supply voltage	12 Volts (DC)
Model	BOX X1
Mounting Type	Freestanding mounting
Mounting type	Freestanding mounting
Number of Channels	1
Package Type Name	cardboard box
Part Number	BOX X1
Specification Met	RoHS
Voltage	12 Volts

Reviews

F**L

Fosi ✌️

Fosi good products

11.08.2025

M**.

It’s good

It served the purpose

17.03.2024

P**F

Twee keer oké.

Netjes een in Duitsland ontwikkelde phono voorversterker in China gemaakt. Dus goed ontwikkeld en (jammer genoeg) goed gebouwd in China.

16.07.2026

P**Z

Ok !!!

Działa ok !!!

28.05.2026

A**E

Sehr guter Phono Vorverstärker

Der Fosi Audio Box X1 Phono Vorverstärker funktioniert einwandfrei und ist sehr rauscharm mit einem Guten Klang! Kann ihn nur wärmstens empfehlen

23.12.2025

A**A

Cumple su función a la perfección

Muy básico. No hace falta más. Encantado.

17.05.2026

M**F

Works

Does the job and well

19.07.2026

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