---
product_id: 292176616
title: "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"
brand: "fosi audio"
price: "€ 83.29"
currency: EUR
in_stock: true
reviews_count: 13
category: "Fosi Audio"
url: https://www.desertcart.hr/products/292176616-box-x1-phono-preamp-for-mm-turntable-mini-stereo-audio
store_origin: HR
region: Croatia
---

# Stable DC 12V power supply 3.5mm headphone + RCA output 2V max output voltage 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

**Brand:** fosi audio
**Price:** € 83.29
**Availability:** ✅ In Stock

## Summary

> 🎶 Elevate your vinyl game with flawless sound and seamless style!

## Quick Answers

- **What is this?** 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 by fosi audio
- **How much does it cost?** € 83.29 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/292176616-box-x1-phono-preamp-for-mm-turntable-mini-stereo-audio)

## Best For

- fosi audio enthusiasts

## Why This Product

- Trusted fosi audio brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Dual Output Flexibility:** Simultaneously connect RCA line outputs and 3.5mm headphones for versatile listening and sharing options.
- • **Vinyl Revival Essential:** Perfectly integrates with your vintage or modern turntable to bring your record collection back to life with rich, detailed audio.
- • **Rugged Elegance Meets Precision:** Encased in a sleek black anodized aluminum chassis that protects your gear while delivering authentic RIAA-standard sound.
- • **Ultra-Low Noise, Pure Vinyl Vibes:** Experience crystal-clear sound with minimal distortion (THD ≤0.08%) and a high signal-to-noise ratio (70dB) for your MM turntable.
- • **Plug & Play with Pro-Level Stability:** Powered by a reliable DC 12V adapter ensuring consistent performance and hassle-free setup.

## Overview

The Fosi Audio Box X1 is a premium MM phono preamp designed to convert phono signals into line-level output with ultra-low noise and precise RIAA frequency response. Featuring a stable 12V DC power supply, dual RCA and 3.5mm headphone outputs, and a durable anodized aluminum case, it delivers professional-grade audio clarity and versatile connectivity for audiophiles and vinyl enthusiasts alike.

## Description

Product description Mini Compact Phono Preamp Fosi Audio BOX X1 MM Phono Preamplifier with V3 Amplifier Input: Turntable, Grounding post, 12V DC input Output: Headphone 3.5MM, RCA DC Input Voltage: 12V Output Voltage Level: 2V max (P-P) at 10K Ohms Comparison Chart BOX X1 Type Phono Preamp MAX Power Output - Input RCA Output RCA + Headphone Treble&Bass Control THD ≤ 0.08% SNR ≥ 70dB Learn More BOX X1 Type Phono Preamp MAX Power Output - Input RCA Output RCA + Headphone Treble&Bass Control THD ≤ 0.08% SNR ≥ 70dB BOX X2 Type Phono Preamp MAX Power Output - Input RCA+3.5mm AUX Output RCA Treble&Bass Control THD ≤ 0.1% SNR ≥ 98dB Learn More BOX X2 RCA+3.5mm AUX ≤ 0.1% ≥ 98dB BOX X3 Type Phono Preamp MAX Power Output - Input Bluetooth+ AUX+ RCA Output RCA Treble&Bass Control THD ≤ 0.1% SNR ≥ 70dB Learn More BOX X3 Bluetooth+ AUX+ RCA BOX X4 Type Phono Preamp MAX Power Output - Input RCA+3.5mm AUX Output RCA+3.5mm AUX Treble&Bass Control THD ≤ 0.1% SNR ≥70dB Learn More BOX X4 ≥70dB V3 Type 2.0 CH Amp MAX Power Output 300W x 2 Input RCA Output Speakers+Pre-Out Treble&Bass Control THD <0.003% SNR ≥110dB Learn More V3 2.0 CH Amp 300W x 2 Speakers+Pre-Out <0.003% ≥110dB Friendly Solutions Guide I. Compatibility Limitations 1. Compatibility: Power adapter: 12V/1.5A; adapter input voltage range: AC 100V - 240V. Please use a matched power adapter to avoid incompatibility. 2. Connections: Step 1: Connect the power adapter to the socket and the BOX X1. Step 2: Connect the MM turntable to the RCA inputs of BOX X1.Connect the ground wire to the grounding post of BOX X1. Step 3: (1) RCA output: Use a RCA cable to connect the active(powered) speakers or amplifier to the RCA output port of BOX X1. (2) Headphone output: Use a 3.5MM audio cable to connect your headphone to the 3.5MM headphone output port of BOX X1.Headphone impedance:≤32Ω. Step 4: Turn on the power switch.The power indicator light will turn red.The indicator light stays onwhen connected. Note: If your turntable doesn't have a ground wire connection,it's no need for a ground wire hooked up to work. Note: Can connect a power amplifier through the 3.5MM or RCA output,then connect the passive speakers. RCA line output and AUX headphone output can be output simultaneously. II. Function & Sound Quality- Related Solutions 1. Please make sure the grounding wire is connected well. 2. Try another turntable and make sure it's a MM turntable. 3. Try another RCA cable and make sure the audio cable is connected correctly. 4. Make sure that all the cables are completely pushed into the BOX X1,incompletely connection will cause this issue. 5. Please keep this device away from other electronic devices. How to adjust speaker volume (BOX X1)？ The speaker volume is controlled through the volume knob on the speakers. 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. 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. 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 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. Can this work with my turntable andheadphones? Yes,The BOX X1 is designed with 3.5MM headphone output.

Review: Great turntable amp - I’m very pleased with this amp. Packaged nicely. Looks great. Affordable. Sound/volume is good. works well with my turntable. Exactly what I needed. I would recommend.
Review: Plug and play preamplifier ... easy and simple to set up - This is simple electronics that just works and occupies a small unobtrusive box ... uh called "BOX." Just plug and play insertion of the RCA cables from my turntable into the input and from the box outputs to the input of my amplifier. No earth loop issues and no need for the fairly well written small manual. The purchase of the preamplifier allowed me to continue using my old stereo amplifier, which does not have a phono input. Previously, I had daisy chained my even older amp with a preamp between the turntable and the main amp. It is much simpler now. The first photo above shows the small form factor of the preamp. It fits in underneath the RCA cables behind the main amp. I glued felt feet to the box to provide better airflow and cooling and to prevent slipping. An earlier reviewer suggested including stick-on rubber feet. I agree, that would be helpful. The power pack which comes with the device is the usual annoying wall-wart type, which we all know uses too much real estate on the power board and blocks other outlets. It is the uppermost one in the photo. You will note that I use Miady Short Power Extension Cords to resolve this issue. These are cheap 8in/20cm extension cords which come in a 10-pack for less than $20. On the upside , the power pack is universal voltage/frequency. On the whole, this was a cheap, direct and simply installed solution to my problem. I did not notice any audio distortion from the preamp; nor did I expect any. Although, I do use it to transcribe my old vinyl records to digital. And the old vinyl is well loved. The scratches are reproduced perfectly.

## Features

- HASSLE-FREE PLAYBACK - The BOX X1 is an ultra-low noise phono preamp that seamlessly converts phono signals into line-level signals, featuring a grounding post for optimal turntable protection
- EXCEPTIONAL AUDIO QUALITY - Equipped with a high-quality DC12V power supply, this MM phono preamplifier offers reliable and stable performance, delivering an output voltage level of 2V max (P-P) at 10K Ohms, an SNR of 70dB, and THD of ≤0.08% @ 1kHz and 3mV, while conforming precisely to the standard RIAA frequency response
- VERSATILE CONNECTIVITY - The phono preamp provides MM turntable input, RCA line output for powered speakers, and a 3.5MM headphone output, allowing simultaneous use of RCA line output and AUX headphone output for maximum flexibility
- PERFECT INTEGRATION - Designed for vinyl record enthusiasts, this phono preamp ensures accurate sound replication with its built-in low-noise phono preamp circuitry, conforming precisely to the RIAA standard, and encased in a durable black anodized steel case for reliable and rugged audio transmission
- WHAT'S INCLUDED - Fosi Audio BOX X1 Phono Preamp x1, 12V Power Adapter x1, User Manual x1

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08TLRPMDC |
| Best Sellers Rank | #19,997 in Electronics ( See Top 100 in Electronics ) #13 in Audio Component Preamplifiers |
| Brand Name | Fosi Audio |
| Customer Reviews | 4.3 out of 5 stars 1,907 Reviews |
| Item Dimensions | 7.09 x 5.12 x 2.36 inches |
| Item Type Name | Phono Preamp |
| Item dimensions L x W x H | 7.09 x 5.12 x 2.36 inches |
| Manufacturer | Fosi Audio |
| Material Type | Aluminum |
| Maximum Supply Voltage | 12 Volts (DC) |
| Minimum Supply Voltage | 12 Volts (DC) |
| Model | BOX X1 |
| Mounting Type | Freestanding |
| Number of Channels | 1 |
| Package Type Name | Retail Packaging |
| Part Number | BOX X1 |
| Specification Met | Riaa |
| Unit Count | 1.0 Count |
| Voltage | 12 Volts |
| Warranty Description | 18-month manufacturer |

## Product Details

- **Item dimensions L x W x H:** 7.09 x 5.12 x 2.36 inches
- **Manufacturer:** Fosi Audio
- **Maximum Supply Voltage:** 12 Volts (DC)
- **Minimum Supply Voltage:** 12 Volts (DC)
- **Voltage:** 12 Volts

## Images

![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 - Image 1](https://m.media-amazon.com/images/I/61N2wiBdvfL.jpg)
![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 - Image 2](https://m.media-amazon.com/images/I/61rKopfQ9mL.jpg)
![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 - Image 3](https://m.media-amazon.com/images/I/71-UnwjFGTL.jpg)
![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 - Image 4](https://m.media-amazon.com/images/I/717UdBuuD3L.jpg)
![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 - Image 5](https://m.media-amazon.com/images/I/711PnlKKLVL.jpg)

## Questions & Answers

**Q: How to adjust speaker volume (BOX X1)？**
A: The speaker volume is controlled through the volume knob on the speakers.

**Q: Is the DC input jack center-negative or center-positive (BOX X1)?**
A: It is a center-positive connector.

**Q: What is the gain (in dB) of BOX X1?**
A: The gain of the BOX X1 is 35 dB.

**Q: Can this be used with a moving coilcartridge?**
A: No,this is a MM phono preamp only.

**Q: Can this work with my turntable andheadphones?**
A: Yes,The BOX X1 is designed with 3.5MM headphone output.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great turntable amp
*by A***R on January 9, 2026*

I’m very pleased with this amp. Packaged nicely. Looks great. Affordable. Sound/volume is good. works well with my turntable. Exactly what I needed. I would recommend.

### ⭐⭐⭐⭐⭐ Plug and play preamplifier ... easy and simple to set up
*by B***H on June 11, 2021*

This is simple electronics that just works and occupies a small unobtrusive box ... uh called "BOX." Just plug and play insertion of the RCA cables from my turntable into the input and from the box outputs to the input of my amplifier. No earth loop issues and no need for the fairly well written small manual. The purchase of the preamplifier allowed me to continue using my old stereo amplifier, which does not have a phono input. Previously, I had daisy chained my even older amp with a preamp between the turntable and the main amp. It is much simpler now. The first photo above shows the small form factor of the preamp. It fits in underneath the RCA cables behind the main amp. I glued felt feet to the box to provide better airflow and cooling and to prevent slipping. An earlier reviewer suggested including stick-on rubber feet. I agree, that would be helpful. The power pack which comes with the device is the usual annoying wall-wart type, which we all know uses too much real estate on the power board and blocks other outlets. It is the uppermost one in the photo. You will note that I use Miady Short Power Extension Cords to resolve this issue. These are cheap 8in/20cm extension cords which come in a 10-pack for less than $20. On the upside , the power pack is universal voltage/frequency. On the whole, this was a cheap, direct and simply installed solution to my problem. I did not notice any audio distortion from the preamp; nor did I expect any. Although, I do use it to transcribe my old vinyl records to digital. And the old vinyl is well loved. The scratches are reproduced perfectly.

### ⭐⭐⭐⭐ Welcome to the new audio renaissance: The FOSI AUDIO BOX X1 Phono Preamplifier.
*by S***E on April 21, 2021*

FOR THOSE WHO CAN REMEMBER.... The 1970's and the first audio renaissance when every magazine, newspaper had an ad about a cool new audio product. Great times! but unfortunately, you probably had to skip a car payment. This time around in this millennia, the audio products are even better and more of them. Best part, you get to keep your car! The FOSI BOX X1 Preamplifier is just that example. UNBOXING: I bought this, the FOSI Audio BOX X1 on Amazon for $29.99. In my experience there are a lot of preamps on the market and they usually sell for $100 and much, much more. depending on what they can do so I was interested to see what this unit can do. As you open the package you see the carton is actually pretty nice. You get the impression that Fosi Audio really cares about it products and wants you to enjoy the product. Hence the inscription "Hi-Fi Made Fun" This means a lot and it's better than just a plain box. Inside you have protective foam which is holding the unit securely and was designed for this particular device. The Preamp itself, the 12 volt power supply, user's guide which incidentally, are very easy to read. All is packaged well and we're ready to go. FIRST IMPRESSIONS: When you first see the BOX X1, you notice the boxy, utilitarian design. Hence the name. Right away you realize this product is all business. Fosi could've put fancy metallic trim and more for the aesthetics but that would have been really unnecessary in this case and probably added to the cost defeating the purpose. What we're looking for here is a preamp that does what it's supposed to do and hopefully do it well. The build quality is really good. Solid. It could take some abuse. You should fully expect this product should last for a very long time. Holding it you feel some weight. Not heavy but beefy. For the most part you would lay this flat but it can be stood up on edge if space is an issue. Making it a good choice for desktop applications. I would have liked to have seen rubber feet to keep it from sliding but you can always buy them at the dollar store. On the front you have the Fosi logo, The model number in a metallic bold print and note that it says in bold print "MM Phono Preamp" which is important to know that it's for moving magnet cartridges only. If you attempt to use a moving coil cartridge or "MC" you will find that the volume is too low as MC cartridges run at a much lower voltage and need more amplification. Finally on the front you have the Power On/Off "button". Now it's unusual to see a push button on/off switch these days on a product this size but there's actually a little engineering know how here. If you were to use a toggle switch you commonly see, in time it would probably get damaged or broken off entirely because of where it's at. In this case the push button is the way to go and besides it's easier to use. The connection panel from left to right, a 3.5mm headphone jack which is an interesting point in it's own. It is actually a low-level audio output. If you connect headphones to it you will notice that it will be at a fixed volume. Usually at a "mild" volume. In the old days a DJ would use this as a "queing" device for the next record to be played. You can use this as another audio output to send to another amp, recorder or measuring device. Next you have the color coded line outputs and phono inputs, a thumb screw ground connection using either a spade connector or bare wire, and finally the 12 volt power supply jack. All seem to connect rather easily. THE SET UP: We will be using an Audio Technica AT-LP120X as a reference table. It's a proven winner and uses the ATVM95E cartridge that's been upgraded with a Shibata stylus so we know we will be sending a good signal to the BOX X1 preamp. The amplifier will be Fosi BT30D 100 watt amplifier with the Sound Appeal 6.5 bookshelf speakers. These speakers are the best budget speakers I've used and we'll get a real good sampling. It's a good habit to get into that when you go to power up the system to always turn on the preamp first before the amplifier. This will prevent speaker "bursts" which over time can damage your system. The record I've chosen is Marty Gold and his Orchestra's - Sounds Unlimited. It's actually a "Dynagroove recording and has incredible detail and dynamics. I'll also play Rachmaninoff and Led Zeppelin IV on 1080 gram vinyl for genre testing. SOUND TEST: As I listen to the Marty Gold I get that euphoria that I usually get when this record is played well. Sharp detail of the horns and strings. The quietest triangle to the loudest kettle drum. The BOX X1 is doing it's job and almost seems proud to do it. The Rachmaninoff is a little tougher yet I can hear ALL the strings as if one-by-one. The Led Zeppelin took me back like it should and sounded very good with probably better detail than I was expecting. I found myself pulling out a few more old favorites and was really enjoying myself. REVIEW: Although it may look like a simple little box, the Fosi BOX X1 phono preamp is a great basic preamp. Solid as a rock. It does everything you need it to do and with the extra output, even does a little more. It processes the audio signal transparently without coloration. For the super affordable price this is perfect for someone just starting in the vinyl record journey, the advanced audiophile needing a basic preamp for a second system or for testing and service purposes. PROS: Solid build Easy to use Maintains sound quality 2 Outputs Very affordable CONS: Utilitarian looks Cannot be used for Moving Coil (MC) cartridges <X1 1.jpg>

## Frequently Bought Together

- 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
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*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-05-20*