---
product_id: 678006075
title: "BOX X5 Phono Preamp for Turntable, Mini Preamplifier Home Audio for MM & MC Cartridge Turntable/Phonograph Record Player/Active Speakers, 4-Level Adjustable Gain 38/48/56/66 dB with RCA"
brand: "fosi audio"
price: "1298 zł"
currency: PLN
in_stock: true
reviews_count: 8
category: "Fosi Audio"
url: https://www.desertcart.pl/products/678006075-box-x5-phono-preamp-for-turntable-mini-preamplifier-home-audio
store_origin: PL
region: Poland
---

# Audiophile-grade components & gold-plated RCA Supports MM & MC cartridges 4-level gain control (38/48/56/66 dB) BOX X5 Phono Preamp for Turntable, Mini Preamplifier Home Audio for MM & MC Cartridge Turntable/Phonograph Record Player/Active Speakers, 4-Level Adjustable Gain 38/48/56/66 dB with RCA

**Brand:** fosi audio
**Price:** 1298 zł
**Availability:** ✅ In Stock

## Summary

> 🎵 Elevate your vinyl game—hear every note like never before!

## Quick Answers

- **What is this?** BOX X5 Phono Preamp for Turntable, Mini Preamplifier Home Audio for MM & MC Cartridge Turntable/Phonograph Record Player/Active Speakers, 4-Level Adjustable Gain 38/48/56/66 dB with RCA by fosi audio
- **How much does it cost?** 1298 zł with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pl](https://www.desertcart.pl/products/678006075-box-x5-phono-preamp-for-turntable-mini-preamplifier-home-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

- • **Precision Gain Control:** Tailor your vinyl sound with 4 adjustable gain levels for flawless MM & MC cartridge compatibility.
- • **Effortless User Experience:** One-touch power, easy toggle between cartridge types, and quick RCA connections for seamless setup.
- • **Minimalist Aluminum Design:** Sleek, compact chassis that elevates your setup without clutter—style meets function.
- • **Transform Your Vinyl Playback:** Unlock hidden layers in your records with crystal-clear RIAA equalization and zero hum interference.
- • **Audiophile-Grade Craftsmanship:** Experience warm, detailed sound with premium capacitors, resistors, and gold-plated connectors.

## Overview

The Fosi Audio BOX X5 is a compact, high-performance phono preamp designed for both MM and MC cartridges. Featuring 4 gain settings (38/48/56/66 dB) and precise RIAA equalization, it delivers warm, detailed sound with audiophile-grade components including precision capacitors, resistors, and gold-plated RCA jacks. Its minimalist aluminum chassis and user-friendly controls make it an essential upgrade for any turntable setup, eliminating hum and enhancing clarity for a truly immersive vinyl experience.

## Description

The BOX X5 phono preamp delivers clear, precise RIAA equalization for MM and MC cartridges, with 4 adjustable gain settings to optimize your turntable's audio quality.

Review: Packs a punch for the price point and sounds cosmic! - Straight out the box, you can tell this is value for money. Nice size, with the much needed base and treble on the front included with the volume control. As others have said, getting the vaccum valves in can be a fiddle, but just take your time and give them a wiggle on a way in, you'll know when you've got them straight. Easy RCA connections on the rear, with the earth plug, which is neat as you can just put in a stripped cable and lock it off with one press, nice and easy. This is perfect for my PL112-D as it immediatly eliminates any hum. Straight off the bat, tried out some James Taylor and wow, what a difference this amp has made to my old amp. The clarity is quite something. Like other reviews have said, you can just "hear more" of the sound stage, its quite remarkable. Slight tweaks of the treble and bass bring more clarity. Really nice sound. Onto something a little heavier, some AC/DC and bam, the sound is thumping, again very clear and much, much better than my old amp which was around the same price. Just to note, I initially experienced some issues with the amp, but customer service were amazing. For transparency, the issue wasn't the amp, it was the RCA cables that needed changing over. I did this, along with a brand new set of tone arm cables and wow, it sounds even better! For the price, I honestly can say, it's perfect. It really does make the sound better, smoother and it's going through a main amp, with further settings for clear, soft, heavy and neutrel. I've just left that on clear and only used the treble and base on this pre-amp for playing tracks. Very, vey pleased with the product, would not hesitate to recommend this. My table is a 1970's Pioneer PL112-D and whilst it's only a very low end entry level table, it fits my needs and sounds brand new with this pre-amp. Many comments from friends and family on the clarity and smooth sound. Can't be any fairer than that! So, if you are in the mood for a well priced, tidy, smooth sounding amp with great customer service from the manufacturer then dive in, I don't think you will regret it.
Review: Better than my Rega - I have an ok enough system, a Sony ps-lx310bt, paired with some wharfedale Denton 80th anniversary speakers and an older onkyo tx-sr307. Before now I was using a used rega fono a2d mkii. I was happy with the rega and it comes highly rated. However, when I treated myself to the dentons I wanted to see if I could get a little more out from the system. My amp is next to upgrade but this little preamp being so cheap, I thought it worth the gamble. I can absolutely tell you now that this works and it’s a better preamp than my Rega. The best way I can describe it is that I could hear separate instruments with the rega but they were almost all waiting their turn and you could only hear say, a guitar, in between any trumpet bits or vice versa. Now, with this Fosi, I hear ALL the instruments, ALL the time. It’s a huge cliche but I’m hearing things in songs that I didn’t know were there previously. My fosi has about 80 or so hours in it now so should be burnt in enough and there is a difference between hour 1 and hour 80 with the first hours being a little harsh/bright. There’s a lovely softness now to the highs and piano sounds are so much more succinct and if you closed your eyes you could almost place one in the room. Bass is, at worst; just as tight as the rega, probably a tad more so. I do use a wharfedale SW150 sub and have no need for more. The Bluetooth function works brilliantly. I only pair with my iPhone and listen to Tidal and can quite honestly say I have no desire for an external dac at the moment. The unit is dead quiet. No hum, no buzz, no interference. It’s quieter than my rega and that costs £100 and gets 5 stars on “What-Hifi”. There is snobbery in the audiophile world and I’m totally sure if this was rebranded as a Rega or Schiit that it would be getting a lot more attention. I bought some decent QED profile rca leads from desertcart and a similar quality aux input for my receiver (an Aukey receiver with Bluetooth 5) and I’m pretty set. I did upgrade my stylus to an LP Gear which outputs 2.5mV so set my gain to 42 decibels accordingly. And yes, this amp is also louder than my rega, not that this means anything to your amp but previous to this, I was at about 55 for volume and now 40 is sometimes too loud depending on the song. All this with no distortion at any volume I’ve tried. Honestly, if you’re on the fence, get down. Buy this and if you don’t get on, you’ve got desertcart’s return policy. I did also get the GE5654 tubes and have used them since day 1 so can’t comment on the ones that came with but I have them as spare if I need them. My friend has the project ds2 which cost him about £400 and I’m not saying this sounds the same but there’s definitely not a £340 difference between the two. And finally, yes the tubes are real and not used as a buffer as there is a slight delay on startup as the bulbs warm up.

## Features

- High Performance: The BOX X5 phono preamp is compatible with both MM and MC cartridges, featuring 4 gain settings and an excellent precise RIAA equalization to provide a clean, direct pass-through of a signal when paired with your turntable.
- Audiophile-Grade Components: This preamp utilizes a variety of materials such as 2% Precision Polyester Film Capacitors, Green Sleeve Copper Lead Audio Capacitors, 0.1% High-Precision Film Resistors, OPA1612 Op-Amp, Gold-Plated RCA Jacks, and more. It picks up subtle and finite detail produced from it and delivers a truly warm and inviting sound.
- Multiple Gain Settings: With 4-Level gain adjustment settings of 38/48/56/66dB, the preamplifier accommodates both MM & MC cartridge types, meeting a variety of needs. Please select the appropriate mode, switch the BOX X5 to MC/MM mode to ensure compatibility.
- Mini and Exquisite: It's built around a minimalist yet functional design featuring an all-aluminum alloy chassis. When paired with the V3 stereo amplifier, the BOX X5 can bring out the best in your vinyl playback, enhancing its frequency response and dynamic performance.
- User Friendly Design: It has an easy-to-use one-touch power button, gain control, and a convenient toggle switch to switch between MC and MM cartridges. Ensure your turntable does not incorporate a built-in preamplifier, or disable any such built-in preamplifier before using the BOX X5.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0DLWM2YPD |
| Best Sellers Rank | 1,155 in Electronics & Photo ( See Top 100 in Electronics & Photo ) 1 in Home Audio Preamplifiers 4,715 in Climate Pledge Friendly: Shop All |
| Item model number | BOX X5 |
| Manufacturer | Fosi Audio |
| Package Dimensions | 26.4 x 20 x 7.2 cm; 1.09 kg |

## Product Details

- **Brand:** Fosi Audio
- **Manufacturer:** Fosi Audio
- **Maximum supply voltage:** 16 Volts
- **Mounting type:** Freestanding
- **Voltage:** 230 Volts

## Images

![BOX X5 Phono Preamp for Turntable, Mini Preamplifier Home Audio for MM & MC Cartridge Turntable/Phonograph Record Player/Active Speakers, 4-Level Adjustable Gain 38/48/56/66 dB with RCA - Image 1](https://m.media-amazon.com/images/I/51iZZ9oqdfL.jpg)

## Questions & Answers

**Q: What op-amps are recommended to upgrade the sound quality of the BOX X5?**
A: It is compatible with DIP8 dual op-amps such as Sparkos SS3602, MUSES02, OPA2604, and others. You can explore the experiences shared by other users on the forum.

**Q: Why is there noise after all devices are connected to the BOX X5?**
A: A. Check all cables for correct connections and good contact. B. avoid using the turntable and BOX X5 on the same power outlet. C. Use RCA cables with 100% shielding, and the shorter the better. D. power cable and RCA cables should avoid tangling

**Q: Why is there a low-level hum in the BOX X5?**
A: Reconfigure your power supply to move the plug and BOX X5 to the opposite side and bottom of the cabinet, away from the turntable. This should help solve the problem. Please check the attached video [link].

**Q: Why is there a buzzing current noise after everything is connected in the BOX X5?**
A: The BOX X5's gain is much higher than regular amplifiers, and it contains a transformer, so try moving the BOX X5 power supply away from both the BOX X5 and turntable. You can try placing it in a different location to find the best position.

**Q: How do I adjust the BOX X5 gain and resistance settings based on the turntable cartridge?**
A: We recommend the following combinations (adjustments can be made based on your actual setup): MM -- 47KΩ: > 2mV MM Low / MC High -- 47KΩ: ≤ 2mV MC -- 100Ω: ≤ 0.5mV MC Low -- 100Ω: ≤ 0.25mV

## Customer Reviews

### ⭐⭐⭐⭐⭐ Packs a punch for the price point and sounds cosmic!
*by M***T on 16 July 2025*

Straight out the box, you can tell this is value for money. Nice size, with the much needed base and treble on the front included with the volume control. As others have said, getting the vaccum valves in can be a fiddle, but just take your time and give them a wiggle on a way in, you'll know when you've got them straight. Easy RCA connections on the rear, with the earth plug, which is neat as you can just put in a stripped cable and lock it off with one press, nice and easy. This is perfect for my PL112-D as it immediatly eliminates any hum. Straight off the bat, tried out some James Taylor and wow, what a difference this amp has made to my old amp. The clarity is quite something. Like other reviews have said, you can just "hear more" of the sound stage, its quite remarkable. Slight tweaks of the treble and bass bring more clarity. Really nice sound. Onto something a little heavier, some AC/DC and bam, the sound is thumping, again very clear and much, much better than my old amp which was around the same price. Just to note, I initially experienced some issues with the amp, but customer service were amazing. For transparency, the issue wasn't the amp, it was the RCA cables that needed changing over. I did this, along with a brand new set of tone arm cables and wow, it sounds even better! For the price, I honestly can say, it's perfect. It really does make the sound better, smoother and it's going through a main amp, with further settings for clear, soft, heavy and neutrel. I've just left that on clear and only used the treble and base on this pre-amp for playing tracks. Very, vey pleased with the product, would not hesitate to recommend this. My table is a 1970's Pioneer PL112-D and whilst it's only a very low end entry level table, it fits my needs and sounds brand new with this pre-amp. Many comments from friends and family on the clarity and smooth sound. Can't be any fairer than that! So, if you are in the mood for a well priced, tidy, smooth sounding amp with great customer service from the manufacturer then dive in, I don't think you will regret it.

### ⭐⭐⭐⭐⭐ Better than my Rega
*by R***R on 17 January 2021*

I have an ok enough system, a Sony ps-lx310bt, paired with some wharfedale Denton 80th anniversary speakers and an older onkyo tx-sr307. Before now I was using a used rega fono a2d mkii. I was happy with the rega and it comes highly rated. However, when I treated myself to the dentons I wanted to see if I could get a little more out from the system. My amp is next to upgrade but this little preamp being so cheap, I thought it worth the gamble. I can absolutely tell you now that this works and it’s a better preamp than my Rega. The best way I can describe it is that I could hear separate instruments with the rega but they were almost all waiting their turn and you could only hear say, a guitar, in between any trumpet bits or vice versa. Now, with this Fosi, I hear ALL the instruments, ALL the time. It’s a huge cliche but I’m hearing things in songs that I didn’t know were there previously. My fosi has about 80 or so hours in it now so should be burnt in enough and there is a difference between hour 1 and hour 80 with the first hours being a little harsh/bright. There’s a lovely softness now to the highs and piano sounds are so much more succinct and if you closed your eyes you could almost place one in the room. Bass is, at worst; just as tight as the rega, probably a tad more so. I do use a wharfedale SW150 sub and have no need for more. The Bluetooth function works brilliantly. I only pair with my iPhone and listen to Tidal and can quite honestly say I have no desire for an external dac at the moment. The unit is dead quiet. No hum, no buzz, no interference. It’s quieter than my rega and that costs £100 and gets 5 stars on “What-Hifi”. There is snobbery in the audiophile world and I’m totally sure if this was rebranded as a Rega or Schiit that it would be getting a lot more attention. I bought some decent QED profile rca leads from Amazon and a similar quality aux input for my receiver (an Aukey receiver with Bluetooth 5) and I’m pretty set. I did upgrade my stylus to an LP Gear which outputs 2.5mV so set my gain to 42 decibels accordingly. And yes, this amp is also louder than my rega, not that this means anything to your amp but previous to this, I was at about 55 for volume and now 40 is sometimes too loud depending on the song. All this with no distortion at any volume I’ve tried. Honestly, if you’re on the fence, get down. Buy this and if you don’t get on, you’ve got Amazon’s return policy. I did also get the GE5654 tubes and have used them since day 1 so can’t comment on the ones that came with but I have them as spare if I need them. My friend has the project ds2 which cost him about £400 and I’m not saying this sounds the same but there’s definitely not a £340 difference between the two. And finally, yes the tubes are real and not used as a buffer as there is a slight delay on startup as the bulbs warm up.

### ⭐⭐⭐⭐⭐ A marked improvement on my turntable’ built in preamp.
*by J***N on 4 June 2024*

The unit seems to be well made. The Valves were unbranded but seem to work well and were easy to install (I might try some upgrades at some point but don’t think it is necessarily going to make much difference). I am using it as a preamp for a Sony PS-LX310BT which I am running through some Edifier active speakers in my home office (one of the perks of working from home). The improvement to the sound was marked and the volume and tone controls work well (I am using the bass and treble controls as the primary tone controls and leaving the Edifier tone controls as neutral). I have found that the volume is best set fairly high on the Box X3 to get the full effect of the valves and the Edifier volume control used as the primary. The valves give a warm sound characteristic but not at the expense of clarity. The overall sound is very clear. Great value for money at £72. Can’t speak for its longevity as I have only had it a couple of days but would say that I am very impressed so far.

## Frequently Bought Together

- Fosi Audio BOX X5 Phono Preamp for Turntable, Mini Preamplifier Home Audio for MM & MC Cartridge Turntable/Phonograph Record Player/Active Speakers, 4-Level Adjustable Gain 38/48/56/66 dB with RCA
- CableMountain 2 RCA to 2 RCA Cable 1m - Gold Plated Male-to-Male Phono to Phono Cable | RCA Audio Cable for Amplifier, Turntable, TV, Home Theater, Speakers and HiFi Systems

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*Product available on Desertcart Poland*
*Store origin: PL*
*Last updated: 2026-01-27*