---
product_id: 161148110
title: "Fosi Audio Box X2 Phono Preamp, Mini Stereo Audio Hi-Fi Preamplifier with Gain Gear, Pre-Amplifier for MM Turntable Phonograph and Record Player, with DC 12V Power Supply"
brand: "fosi audio"
price: "KSh24732"
currency: KES
in_stock: true
reviews_count: 10
category: "Fosi Audio"
url: https://www.desertcart.co.ke/products/161148110-fosi-audio-box-x2-phono-preamp-mini-stereo-audio-hi
store_origin: KE
region: Kenya
---

# Tube preamp with warm analog sound Includes DC 12V power supply 3 gain modes (39/42/45 dB) Fosi Audio Box X2 Phono Preamp, Mini Stereo Audio Hi-Fi Preamplifier with Gain Gear, Pre-Amplifier for MM Turntable Phonograph and Record Player, with DC 12V Power Supply

**Brand:** fosi audio
**Price:** KSh24732
**Availability:** ✅ In Stock

## Summary

> 🎵 Elevate your vinyl vibe with warm tube power and precision gain control!

## Quick Answers

- **What is this?** Fosi Audio Box X2 Phono Preamp, Mini Stereo Audio Hi-Fi Preamplifier with Gain Gear, Pre-Amplifier for MM Turntable Phonograph and Record Player, with DC 12V Power Supply by fosi audio
- **How much does it cost?** KSh24732 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.ke](https://www.desertcart.co.ke/products/161148110-fosi-audio-box-x2-phono-preamp-mini-stereo-audio-hi)

## 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

- • **Noise-Free Grounding:** Integrated grounding post eliminates hum and low-frequency noise, preserving crystal-clear sound fidelity.
- • **Rich Tube-Driven Warmth:** Experience the lush, smooth analog sound signature of vacuum tube amplification that elevates every vinyl spin.
- • **Compact & Stylish Design:** Sleek mini form factor with ambient tube glow fits seamlessly on any shelf or desk, adding a touch of audiophile chic.
- • **Customizable Gain Control:** Switch effortlessly between 39, 42, and 45 dB gain settings to perfectly match your turntable and listening environment.
- • **Universal Tube Compatibility:** Easily swap vacuum tubes (6K4, 6J1, 6J4, GE5654, 6AK5, 66) to tailor your audio tone and keep your setup future-proof.

## Overview

The Fosi Audio Box X2 Phono Preamp is a compact, high-fidelity tube preamplifier designed for MM turntables, featuring three switchable gain modes (39, 42, 45 dB) and a grounding post to eliminate noise. It supports multiple vacuum tube types for customizable sound and includes a DC 12V power supply. Perfect for audiophiles seeking rich analog warmth and versatile compatibility in a stylish, space-saving design.

## Description

Buy Fosi Audio Box X2 Phono Preamp, Mini Stereo Audio Hi-Fi Preamplifier with Gain Gear, Pre-Amplifier for MM Turntable Phonograph and Record Player, with DC 12V Power Supply: Preamplifiers - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: Moving Coil vs Moving Magnet cartridges - Let's jump right to the most glaring bit of misinformation floating around the reviews here. Several reviewers here are stating this pre-amp is for moving magnet type phono cartridges only. NOW I can't speak for ALL "moving coil" carts, but my, Denon DL 103, moving coil, has no apparent (audible) issues with this amp. None. Sounds perfect. I've been transferring my Vinyl to bits and my disk recorder (records like a tape deck but to a CD) was getting really low levels. I could correct this after the fact with SW with no quality issues, but it was awkward. This amp was just the boost I needed. (no gain control on the recorder) SO the selectable output level switch is nice. I'm ok at the lowest, better at the middle, and just a showing a flicker of red on the highest. This was first time I'd ever seen level-leds show any red. Bottom line, Great little amp for the $. Works with any modern, quality cartridge/turntable. You'll notice the instructions don't say jack about "only moving magnet", but the input is labeled "MM". perhaps that's where the confusion sprang from. Fosi may have done that simply because moving magnet are typically less expensive and hence are likely to be what most people will have. The other thing the instructions don't say what input on your main amp/receiver to plug the output from the fosi into. It's just says "connect to your amp" for the record it's Line In or Aux, NOT phono. I plugged mine direct into the line in on my recorder and returned to the amp from the recorder. Lastly Packing. Several guys groused loudly about packing. Mine too was shipped in plain thin, bubble wrap-type bag. But that's fine the way the tubes are packed inside the Fosi box, you could drop the box from 5 feet(ish) over and over and not damage anything but the outside of the box. Final tip. Installing the tubes. They go in pretty tight. So once your sure you're lined up correctly don't be afraid to lean into it a bit. UPDATE MM V MC cartridge compatibility. To be clear, at first listen, THIS particular amp, SEEMS to be fine with at least one particular MC cartg, my Denon DL-103 MC-type cart. No distortion, no hum. Output level perfect, (best on the middle gain setting of 3). But after applying a more critical "ear" I'm not convinced I'm getting all of the clarity and or fullness this legendary DL-103 is famous for. NOW there are a couple possible explanations for this that don't involve this "amp v MC cartridge compatibility" issue. Age of the cartridge being first. While it's well under the life-span limit in hours played, it IS 10 years old. Also, I have never checked, let alone adjusted, the turntable vs tone-arm for level, so there's every reason to assume this (aka "VTA") setting is not optimum. I was shocked to learn how big a SOUND difference this, the angle of the stylus to the groove (VTA) can make. (follow up on that to come) What I can say for now is that the combination of this MC cart and this amp 'sounds' correct, if not "super'. and after playing it last night for about 6 or 7 hours it doesn't appear that either the amp nor the cart is being damaged by the other. If you're wondering if your MC cart will be similarly content with this amp, be advised the "Recommended Load Resistance" on my Denon DL-103 is "100 ohm or more, (except when a transformer is provided)" I believe transformer is what some MC type carts refer to a pre-amp as. The manual for the Fosi X2 doesn't give any ohm rating, load/capacitance, resistance rating number of any kind, input or output. Bottom line this could be a viable "budget option" amp for at least some, MC type carts. Since "proper" MC pre-amp/transformers, start about double what this one costs and run as much as 4 or 5 times more expensive.
Review: Amazing tiny tube preamp. Works great with Audio Technical SL-1200MK5. - Amazing little amp. It looks beautiful. Provides incredibly strong signal to my speaker. I connected this little tube amp to my Audio Technica SL-1200MK5 turntable. The original output from the turntable was too low, but after adding this amp, it’s crazy loud now. Even at the lowest setting, I have to adjust my speaker to be at like 5-10% for comfortable volumes. So it definitely works! It LOOKS amazing, when warmed up, the blue lights and the soft warm orange glow of the amp looks so good. It’s small and fits right on my shelf. It comes with a GROUND screw, thank goodness for good design. My turntable has a ground pin and I didn't have a reliable place to connect it too, but glad this little unit had a place for it. The really helps eliminate any additional noise and the tube amps really help warm up the sound. Tube amps provide odd order harmonics which help make your vinyls sound richer and warmer; coming off from a digital amp, I can definitely tell the difference. Had to be a little careful when installing the tube amps, but glad we can replace them over time as needed.

## Features

- Tube MM Phono Preamplifier: This Fosi Audio phono preamplifier removes low-frequency noise and ensures clear sound quality by converting phono signals to line-level signals using high-quality components and low-noise integrated circuits. It is designed to safeguard your turntable thanks to its grounding post
- 3 Switchable Gain Modes: You can switch between 3 modes: 39, 42, or 45 dB. High compatibility and customizable control are provided by the adjustable gain levels. Also, it has very good circuitry and entry-level, high-end analog sound
- Tube Preamplifier: With a 3.5mm AUX input, it's also a tube preamp. Fosi Audio used high-quality component parts for the design and assemblage of this phono preamplifier. You can enjoy a very warm and smooth sound
- Applicable Vacuum Tube Model: The compatible vacuum tube models are 6K4, 6J1, 6J4, GE5654, 6AK5, 66, etc. To make changes to your stereo system yourself, simply swap out the vacuum tubes. Consider that distinct tubes produce various sounds
- Package Content: You will get 1 x Box X2 phono preamp, 2 x vacuum tubes, 1 x RCA cable, 1 x power adaptor, and 1 x user manual

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07XNTHHBP |
| Best Sellers Rank | #5,598 in Electronics ( See Top 100 in Electronics ) #2 in Audio Component Preamplifiers |
| Brand | Fosi Audio |
| Customer Reviews | 4.6 4.6 out of 5 stars (3,156) |
| Date First Available | September 9, 2019 |
| Item Weight | 10.9 ounces |
| Item dimensions L x W x H | 4.66 x 3.85 x 1.29 inches |
| Item model number | BoxX2 |
| Language | English |
| Manufacturer | Fosi Audio |
| Maximum Supply Voltage | 12 Volts (DC) |
| Minimum Supply Voltage | 12 Volts (DC) |
| Mounting Type | Freestanding |
| Number of Channels | 1 |
| Output Power | 12 Volts |
| Package Type Name | box |
| Product Dimensions | 4.66 x 3.85 x 1.29 inches |
| Specification Met | Standard Riaa, Ce |
| Voltage | 12 Volts (DC) |

## Product Details

- **Item dimensions L x W x H:** 4.66 x 3.85 x 1.29 inches
- **Manufacturer:** Fosi Audio
- **Maximum Supply Voltage:** 12 Volts (DC)
- **Minimum Supply Voltage:** 12 Volts (DC)
- **Voltage:** 12 Volts (DC)

## Images

![Fosi Audio Box X2 Phono Preamp, Mini Stereo Audio Hi-Fi Preamplifier with Gain Gear, Pre-Amplifier for MM Turntable Phonograph and Record Player, with DC 12V Power Supply - Image 1](https://m.media-amazon.com/images/I/61xsoICTIOL.jpg)

## Questions & Answers

**Q: My turntable has a built-in phono preamp. How do I connect it to the BOX X2?**
A: • If the turntable has a built-in phono preamp, switch it to "Line Out" mode and connect it to the 3.5mm input on the BOX X2. • If the turntable is set to "Phono" mode, connect it to the MM input on the BOX X2 for optimal sound.

**Q: Does the BOX X2 have any built-in tone control? Dose the BOX X2 have bluetooth?**
A: No. The BOX X2 don't have bluetooth. And the BOX X2 features gain control, not tone control. For enhanced tonal shaping, consider using models like BOX X4, which includes treble and bass adjustments. For bluetooth consider using models like BOX X3.

**Q: How to connect a turntable to the BOX X2 and active speakers?**
A: Make sure the turntable has a Phono output with an MM cartridge. Some turntables have a built-in phono preamplifier, set it to Phono switch.

**Q: Can I replace the tubes in the BOX X2?**
A: You can substitute with 7-pin tubes such as 6AK5, 6AK5W, 6Zh1P, 6J1, and 6J1P. These can also directly replace WE-403A, WE-403B, EF95, 6A2 tubes, 5725w tubes and standard 5654 tubes.

**Q: Turntable has built-in preamp/line switch—Can I still use this instead of my built-in preamp?**
A: Yes, deselect the preamp on your turntable. Note: Please confirm whether your turntable has a built-in phono preamp, if there is a phono preamp, and it cannot be deselected, then you can only connect 3.5 mm input, can not connect MM Turntable input.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Moving Coil vs Moving Magnet cartridges
*by N***N on December 8, 2023*

Let's jump right to the most glaring bit of misinformation floating around the reviews here. Several reviewers here are stating this pre-amp is for moving magnet type phono cartridges only. NOW I can't speak for ALL "moving coil" carts, but my, Denon DL 103, moving coil, has no apparent (audible) issues with this amp. None. Sounds perfect. I've been transferring my Vinyl to bits and my disk recorder (records like a tape deck but to a CD) was getting really low levels. I could correct this after the fact with SW with no quality issues, but it was awkward. This amp was just the boost I needed. (no gain control on the recorder) SO the selectable output level switch is nice. I'm ok at the lowest, better at the middle, and just a showing a flicker of red on the highest. This was first time I'd ever seen level-leds show any red. Bottom line, Great little amp for the $. Works with any modern, quality cartridge/turntable. You'll notice the instructions don't say jack about "only moving magnet", but the input is labeled "MM". perhaps that's where the confusion sprang from. Fosi may have done that simply because moving magnet are typically less expensive and hence are likely to be what most people will have. The other thing the instructions don't say what input on your main amp/receiver to plug the output from the fosi into. It's just says "connect to your amp" for the record it's Line In or Aux, NOT phono. I plugged mine direct into the line in on my recorder and returned to the amp from the recorder. Lastly Packing. Several guys groused loudly about packing. Mine too was shipped in plain thin, bubble wrap-type bag. But that's fine the way the tubes are packed inside the Fosi box, you could drop the box from 5 feet(ish) over and over and not damage anything but the outside of the box. Final tip. Installing the tubes. They go in pretty tight. So once your sure you're lined up correctly don't be afraid to lean into it a bit. UPDATE MM V MC cartridge compatibility. To be clear, at first listen, THIS particular amp, SEEMS to be fine with at least one particular MC cartg, my Denon DL-103 MC-type cart. No distortion, no hum. Output level perfect, (best on the middle gain setting of 3). But after applying a more critical "ear" I'm not convinced I'm getting all of the clarity and or fullness this legendary DL-103 is famous for. NOW there are a couple possible explanations for this that don't involve this "amp v MC cartridge compatibility" issue. Age of the cartridge being first. While it's well under the life-span limit in hours played, it IS 10 years old. Also, I have never checked, let alone adjusted, the turntable vs tone-arm for level, so there's every reason to assume this (aka "VTA") setting is not optimum. I was shocked to learn how big a SOUND difference this, the angle of the stylus to the groove (VTA) can make. (follow up on that to come) What I can say for now is that the combination of this MC cart and this amp 'sounds' correct, if not "super'. and after playing it last night for about 6 or 7 hours it doesn't appear that either the amp nor the cart is being damaged by the other. If you're wondering if your MC cart will be similarly content with this amp, be advised the "Recommended Load Resistance" on my Denon DL-103 is "100 ohm or more, (except when a transformer is provided)" I believe transformer is what some MC type carts refer to a pre-amp as. The manual for the Fosi X2 doesn't give any ohm rating, load/capacitance, resistance rating number of any kind, input or output. Bottom line this could be a viable "budget option" amp for at least some, MC type carts. Since "proper" MC pre-amp/transformers, start about double what this one costs and run as much as 4 or 5 times more expensive.

### ⭐⭐⭐⭐⭐ Amazing tiny tube preamp. Works great with Audio Technical SL-1200MK5.
*by L***L on June 24, 2025*

Amazing little amp. It looks beautiful. Provides incredibly strong signal to my speaker. I connected this little tube amp to my Audio Technica SL-1200MK5 turntable. The original output from the turntable was too low, but after adding this amp, it’s crazy loud now. Even at the lowest setting, I have to adjust my speaker to be at like 5-10% for comfortable volumes. So it definitely works! It LOOKS amazing, when warmed up, the blue lights and the soft warm orange glow of the amp looks so good. It’s small and fits right on my shelf. It comes with a GROUND screw, thank goodness for good design. My turntable has a ground pin and I didn't have a reliable place to connect it too, but glad this little unit had a place for it. The really helps eliminate any additional noise and the tube amps really help warm up the sound. Tube amps provide odd order harmonics which help make your vinyls sound richer and warmer; coming off from a digital amp, I can definitely tell the difference. Had to be a little careful when installing the tube amps, but glad we can replace them over time as needed.

### ⭐⭐⭐⭐⭐ Great Value in a Pre-amp
*by T***. on July 22, 2025*

Very impressive pre-amp that worked right out of the box, but not without a scarey moment or two. A pre-amp was necessitated as my Audio-Technica table does not have one and my Pioneer SX-10AE receiver lacks a Phono Input, only two Line inputs. To eliminate the 'scarey moments' ensure the selector switch on back of the turntable is in the Phono position after adding the pre-amp or horrible distortion will be the result. And, I believe, the vacuum tubes need to be "broken-in" by running for a short while under load. My 1st LP sounded horrible. I considered returning it or the pre-amp! But, the 2nd and 3rd LPs sounded great. I put the 1st LP back on and it too became great. This demonstrated to me that the new tubes needed a little exercise to perform correctly. Many people describe the sound from from tube type pre-amps as being warm and with other positive descriptions. I'm not sophisticated enough to know what they mean. All I can say is that the sound out of my system is absolutely wonderful. The volume control is a step-switch I woukd have prefered a smooth control without the steps, but this is effective too. I highly recommend the Fosi pre-amp. It's available at a small cost for big, pleasing sound.

## Frequently Bought Together

- Fosi Audio Box X2 Phono Preamp, Mini Stereo Audio Hi-Fi Preamplifier with Gain Gear, Pre-Amplifier for MM Turntable Phonograph and Record Player, with DC 12V Power Supply
- Riverstone Audio - Tested/Matched Pair (2 Tubes) 7-Pin JAN 5654W Fully-Tested Vacuum Tubes - Upgrade for 6AK5 / 6J1 / 6J1P / EF95 - JAN 5654W Platinum Grade Pair
- Monoprice 1.5ft Premium 2 RCA Plug/2 RCA Plug M/M 22AWG Cable - Black

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*Product available on Desertcart Kenya*
*Store origin: KE*
*Last updated: 2026-02-04*