---
product_id: 69958070
title: "Pro-Ject Tube Box S2 Black - Phono Preamp"
brand: "pro-ject"
price: "$U46958"
currency: UYU
in_stock: true
reviews_count: 9
category: "Pro Ject"
url: https://www.desertcart.uy/products/69958070-pro-ject-tube-box-s2-black-phono-preamp
store_origin: UY
region: Uruguay
---

# Discrete low-noise circuit, no op-amps 2 ECC83 tubes for rich stereo sound Aluminum-metal housing blocks vibration & EMI Pro-Ject Tube Box S2 Black - Phono Preamp

**Brand:** pro-ject
**Price:** $U46958
**Availability:** ✅ In Stock

## Summary

> 🎶 Elevate your vinyl ritual with tube-powered clarity and style

## Quick Answers

- **What is this?** Pro-Ject Tube Box S2 Black - Phono Preamp by pro-ject
- **How much does it cost?** $U46958 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.uy](https://www.desertcart.uy/products/69958070-pro-ject-tube-box-s2-black-phono-preamp)

## Best For

- pro-ject enthusiasts

## Why This Product

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

## Key Features

- • **Double Mono Design:** Independent left/right tube channels ensure superior stereo separation and immersive soundstage.
- • **Audiophile-Grade Components:** Polystyrene capacitors and gold-plated RCA connectors guarantee crystal-clear signal integrity and durability.
- • **Tailored for MM & MC Cartridges:** Flexible cartridge loading settings let you optimize sound for both Moving Magnet and Moving Coil pickups effortlessly.
- • **Pure Tube Warmth, Modern Precision:** Miniature phono tubes deliver premium analog warmth with cutting-edge discrete circuitry—no cheap op-amps here.
- • **Vibration & Interference Shielding:** Robust aluminum and metal sandwich chassis protects your music from external noise and mechanical vibrations.

## Overview

The Pro-Ject Tube Box S2 Black is a premium phono preamp featuring dual ECC83 tubes in a double mono configuration for exceptional stereo separation. Designed for both MM and MC cartridges, it uses a low-noise discrete circuit without op-amps, audiophile-grade polystyrene capacitors, and gold-plated RCA connectors. Its sturdy aluminum-metal housing minimizes vibration and electromagnetic interference, delivering warm, clear, and detailed analog sound that transforms your vinyl listening experience.

## Description

Tube Box S2 Black

Review: Really good sound! - This little phono preamp from Pro-Ject sounds good! I had been using an Art DJ Pre II phono preamp, which is IMO a great deal and practically a steal for how cheap it sells. But I had desertcart gift certificates burning a whole in my pocket. I read a lot before buying the Tube Box S2, as I was not really dissatisfied with the Art DJ Pre II. My biggest concerns around purchasing the Tube Box S2 was that it supposedly isn’t an “all-tube” phono preamp and the cost, which is high but not that high for “quality” audio gear. What eventually sold me on the Tube Box S2 was even if it isn’t all tubes producing the gain and RIAA equalization, it is supposedly using high-quality capacitors and FETs (transistors) in place of less expensive op amps or chips. As a consumer of audio appliances, I don’t really have anything against solid-state electronics, so I appreciate that Pro-Ject designed and built the Tube Box S2 with quality in mind. Even if it’s not all tubes, it’s built with circuits and parts that are as high of a quality as you can get at this price point, and yes, the tubes certainly are being used in the output and supposedly in some of the gain. The build quality, the fit and finish, on the exterior of this little box is top notch, too. It’s a nice, solid-feeling piece of metal, presumably aluminum, and the silver version is a nice, silky, matte finish. Usually a phono preamp is at best a box you can place unobtrusively, but the Tube Box S2 actually looks kind of nice, too. The most important thing though is the sound — WOW! It puts my Art DJ Pre II to shame. The gain, which is adjustable, is amazing and it’s across the whole of my audible spectrum. The bass, midrange and treble are all well present and accounted for with the pleasant RIAA roll-off beloved by us vinyl enthusiasts. The sound is quite clear. The Tube Box S2 also has 2 features I’ve yet to use, which are also very good at this price point. 1.) It has phono cartridge-loading flexibility, so you can use MM or MC cartridges across a wide variety of impedance and capacitance settings. This phono preamp gives you the ability to try a whole lot of cartridges if you feel so inclined. 2.) Last, and I’m sure I’ll be trying this someday, you can roll tubes! You can use the 12ax7-compatible tubes of your choice with this little box. To sum up, yes, it seems a bit expensive for a phono preamp, but compared to other “boutique audio” products: it’s relatively cheap; it seems thoughtfully designed and built well; it has a really good set of features; and it sounds great!
Review: Don't Think Twice, It is Exceptional. - A month in, and I'm sure this is my preamp forever. Give it time, I distinctly noticed an improvement after 30-40 hours of playing. Either a break-in of the tubes, or an adjustment of my ears...I think it's both. Incidentally, the stock tubes in mine are JJ branded (Slovakia), which is probably what the Pro-Ject branded stock tubes are. The separation and clarity here is exceptional, each tube serves its own channel, left and right. Despite some of the chatter, there are no chips connected to the tubes. The gain settings are extremely useful, 43db or 50db is my sweet spot depending on what I'm listening to. I needed a good preamp more than I knew. Spend on your preamp like you spent on your turntable and stylus. I'm running a Pro-Ject Debut Carbon Esprit SB with a Marantz 1060 to some Mitsubishi DS-40 speakers (late 70s "Diatone Series"), with a Sumiko Moonstone.

## Features

- Innovative pioneering phono tubes in miniature format with premium sound. Suitable for MM and MC pickups
- Very low noise circuit, complete discrete construction without op amp, polystyrene audiophile capacitors
- 2 ECC83 tubes (interchangeable), constructed in double mono for better channel separation
- Gold RCA inputs and outputs, front subsonic filter switch, front gain settings
- Aluminum and metal sandwich housing protects against vibration and electromagnetic interference

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B075KPB1P2 |
| Best Sellers Rank | #30,531 in Electronics ( See Top 100 in Electronics ) #5 in Home Audio Phono Preamps |
| Brand | Pro-Ject |
| Customer Reviews | 4.5 4.5 out of 5 stars (476) |
| Date First Available | November 25, 2017 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 2.12 pounds |
| Item model number | Pro-Ject Tube Box S2 |
| Manufacturer | Pro-ject |
| Material | Cotton |
| Maximum Supply Voltage | 18 Volts |
| Mounting Type | Table Top |
| Number of Channels | 2 |
| Output Power | 10 Watts |
| Package Type Name | single unit box |

## Product Details

- **Brand:** Pro-Ject
- **Manufacturer:** Pro-ject
- **Maximum Supply Voltage:** 18 Volts
- **Mounting Type:** Table Top
- **Number of Channels:** 2

## Images

![Pro-Ject Tube Box S2 Black - Phono Preamp - Image 1](https://m.media-amazon.com/images/I/71-LwDsjtEL.jpg)
![Pro-Ject Tube Box S2 Black - Phono Preamp - Image 2](https://m.media-amazon.com/images/I/818UCAja3QL.jpg)

## Available Options

This product comes in different **Color** options.

## Questions & Answers

**Q: How come my tubes dont light up?**
A: Thanks for your question. The tubes on the S2 do not light up. They have a very low glow that is barely perceptible.
World Wide Stereo is 43 years old and a proud authorized Pro-Ject dealer.

**Q: Can anyone tell me which dip switches should be on for an ortofon 2m blue cartridge? thanks! this is all new to me.**
A: Thanks for your question. Using the included owners manual as a guide, for a 2M Blue:: 1-off, 2-on, 3-off, 4 -8 are off.
World Wide Stereo - since 1979 - and a proud authorized Pro-Ject dealer.

**Q: can you roll the tubes?**
A: Yes, you can.

**Q: Anyone recommend dip switch settings for sumiko rainer mm cartridge?**
A: Thanks for your question. The Sumiko Rainer cartridge specifications state  Load Impedance: 47kOhms, Recommended Load Capacitance: 100pF to 200pF, and Output Voltage: 5.0mV. Set input impedance at default 47k, Capacitance at 150pF. Set Input gain at the recommended 43dB. The Tube Box S2 owners manual details the 8 dip switch settings.
World Wide Stereo is 42 years old and a proud authorized Pro-Ject dealer.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Really good sound!
*by J***L on February 9, 2020*

This little phono preamp from Pro-Ject sounds good! I had been using an Art DJ Pre II phono preamp, which is IMO a great deal and practically a steal for how cheap it sells. But I had Amazon gift certificates burning a whole in my pocket. I read a lot before buying the Tube Box S2, as I was not really dissatisfied with the Art DJ Pre II. My biggest concerns around purchasing the Tube Box S2 was that it supposedly isn’t an “all-tube” phono preamp and the cost, which is high but not that high for “quality” audio gear. What eventually sold me on the Tube Box S2 was even if it isn’t all tubes producing the gain and RIAA equalization, it is supposedly using high-quality capacitors and FETs (transistors) in place of less expensive op amps or chips. As a consumer of audio appliances, I don’t really have anything against solid-state electronics, so I appreciate that Pro-Ject designed and built the Tube Box S2 with quality in mind. Even if it’s not all tubes, it’s built with circuits and parts that are as high of a quality as you can get at this price point, and yes, the tubes certainly are being used in the output and supposedly in some of the gain. The build quality, the fit and finish, on the exterior of this little box is top notch, too. It’s a nice, solid-feeling piece of metal, presumably aluminum, and the silver version is a nice, silky, matte finish. Usually a phono preamp is at best a box you can place unobtrusively, but the Tube Box S2 actually looks kind of nice, too. The most important thing though is the sound — WOW! It puts my Art DJ Pre II to shame. The gain, which is adjustable, is amazing and it’s across the whole of my audible spectrum. The bass, midrange and treble are all well present and accounted for with the pleasant RIAA roll-off beloved by us vinyl enthusiasts. The sound is quite clear. The Tube Box S2 also has 2 features I’ve yet to use, which are also very good at this price point. 1.) It has phono cartridge-loading flexibility, so you can use MM or MC cartridges across a wide variety of impedance and capacitance settings. This phono preamp gives you the ability to try a whole lot of cartridges if you feel so inclined. 2.) Last, and I’m sure I’ll be trying this someday, you can roll tubes! You can use the 12ax7-compatible tubes of your choice with this little box. To sum up, yes, it seems a bit expensive for a phono preamp, but compared to other “boutique audio” products: it’s relatively cheap; it seems thoughtfully designed and built well; it has a really good set of features; and it sounds great!

### ⭐⭐⭐⭐⭐ Don't Think Twice, It is Exceptional.
*by J***G on June 14, 2025*

A month in, and I'm sure this is my preamp forever. Give it time, I distinctly noticed an improvement after 30-40 hours of playing. Either a break-in of the tubes, or an adjustment of my ears...I think it's both. Incidentally, the stock tubes in mine are JJ branded (Slovakia), which is probably what the Pro-Ject branded stock tubes are. The separation and clarity here is exceptional, each tube serves its own channel, left and right. Despite some of the chatter, there are no chips connected to the tubes. The gain settings are extremely useful, 43db or 50db is my sweet spot depending on what I'm listening to. I needed a good preamp more than I knew. Spend on your preamp like you spent on your turntable and stylus. I'm running a Pro-Ject Debut Carbon Esprit SB with a Marantz 1060 to some Mitsubishi DS-40 speakers (late 70s "Diatone Series"), with a Sumiko Moonstone.

### ⭐⭐⭐⭐⭐ Just the upgrade I was looking for!
*by B***. on March 10, 2025*

Im picky about my home audio setup and didn't have any intentions to upgrade until I realized my old phono preamp did not survive our recent move. This led me to decide on an upgrade and find something new. Coming from mostly solid state in the past I decided I wanted to give tubes a try but also did not want to break the bank. Boy was I impressed. This Tube Box S2 was a huge upgrade to my system. My vinyl's felt warmer, and I was picking up details in the music I hadn't before. Setup is simple if you follow the provided instructions. It looks modest and isnt a big obnoxious bright amp by any means which I like as my entertainment center is already crowded with other audio and gaming equipment. Everything pro-ject builds that I have used has had great quality and I fully expect this to last me a long long time.

## Frequently Bought Together

- Pro-Ject Tube Box S2 Pure-Tube MM/MC Phono Preamplifier (Black)
- Primeda Auidophile 2RCA Male to 2RCA Male Stereo Audio Cable,Gold Plated | 4N Oxgen-Free Copper Core (3 Feet (1M))
- Monoprice 1.5ft Premium 2 RCA Plug/2 RCA Plug M/M 22AWG Cable - Black

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*Product available on Desertcart Uruguay*
*Store origin: UY*
*Last updated: 2026-02-13*