---
product_id: 87763493
title: "Tube Box S2, High End Valve Phono Preamplifier (Black)"
brand: "pro-ject"
price: "€ 956.43"
currency: EUR
in_stock: true
reviews_count: 13
category: "Pro Ject"
url: https://www.desertcart.hr/products/87763493-tube-box-s2-high-end-valve-phono-preamplifier-black
store_origin: HR
region: Croatia
---

# 2 x ECC83 valves for warm, lush tube sound Adjustable impedance & capacitance for perfect cartridge match Dual mono circuitry for pristine channel separation Tube Box S2, High End Valve Phono Preamplifier (Black)

**Brand:** pro-ject
**Price:** € 956.43
**Availability:** ✅ In Stock

## Summary

> 🎶 Unlock the warm, detailed soul of vinyl — your records deserve the Tube Box S2!

## Quick Answers

- **What is this?** Tube Box S2, High End Valve Phono Preamplifier (Black) by pro-ject
- **How much does it cost?** € 956.43 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/87763493-tube-box-s2-high-end-valve-phono-preamplifier-black)

## 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

- • **Audiophile Bargain:** High-end tube preamp performance at a price that invites you to rediscover your vinyl collection with fresh ears.
- • **Robust EMI Shielding:** Sturdy S2 casing and valve protective cages minimize interference and vibrations for crystal-clear playback.
- • **Tailored Audio Tuning:** Customizable gain, impedance, capacitance, and subsonic filter settings let you optimize sound for any MM or MC cartridge.
- • **Versatile Compatibility:** Seamlessly supports both Moving Magnet and Moving Coil cartridges, making it the ultimate upgrade for any vinyl setup.
- • **Pure Valve Sound, No Op-Amps:** Experience authentic tube warmth with discrete circuitry, elevating your vinyl listening to audiophile status.

## Overview

The Pro-Ject Tube Box S2 is a compact, high-end valve phono preamplifier designed for both MM and MC cartridges. Featuring dual mono circuitry without op-amps, it delivers authentic tube warmth via 2 ECC83 valves. Adjustable impedance, capacitance, and gain settings allow precise tuning to your cartridge, while its robust casing protects against electromagnetic interference and vibrations. This preamp offers audiophile-grade sound quality and versatility at an accessible price, making it a must-have for vinyl enthusiasts seeking to elevate their listening experience.

## Description

Product Description Pro-Ject Audio Systems Tube Box S2 - Compact high-end tube phono preamplifier The Tube Box S2 is a premium phono stage for both Moving Magnet (MM) and Moving Coil (MC) cartridges. In order to achieve the best sound possible, it's become Pro-Ject's first product to feature a discrete circuit design without any operational amplifiers (op-amps). Versalite, Compact, Powerful The Tube Box S2 delivers a relaxed audio performance with lush mids in a full and enveloping sound stage, just like far more expensive pure-valve phono stages are capable of. Thanks to the built-in adjustable gain, capacitance, impedance and subsonic filter settings, it's possible to tune the device to perfectly complement almost any modern MM or MC cartridge. Defence against electromagnetic interferences The new S2 casing is a big additional asset to the design, as not only does it deliver the highest visual appeal, but it is also sturdy enough to protect the internal circuitry against unwanted interferences and vibrations, which can cause unpleasant listening experiences. The Tube Box S2 also benefits from protective cages around the valves - inspired by the superior Tube Box DS design Ready for the next step! Inspired by high-end designs but available for a very appealing price, the Tube Box S2 is a real audiophile bargain.

Review: A lovely bit of kit... - Out of the box this little phono preamp sounded great. Lots of detail and warm overtones. The stock valves are ok but can definitely be upgraded. Note, for those interested the stock valves are JJ ECC83-S rebranded with the Projects own branding. These are a fine tube in their own right and certainly do the job. I had a couple of pairs of other valves in my collection to try for a bit of upgrading. My comparitive impressions were: Stock JJ: Very warm presentation definitely giving that tube sound, a rich bass with a smooth if maybe slightly rolled of treble. I can see why these were chosen as the stock valves. Tung Sol 12AX7: A more balanced sound across the range with better treble extension and detail, a tighter bass and generally more controlled presentation. I liked this setup very much. However... NOS Mullard ECC83 Short Grey Plate: I'm a bit of a fan boy of NOS Mullards already using them extensively throughout my system to be honest. So... Think all the good bits described with the tubes above all rolled up into a single valve and you get this. Balanced presentation throughout detailed highs and extended bass with a full lush midrange and that all important Mullard yummyness that draws you in. I'm not going to even bother trying the Shuguangs I have as I already know they won't even touch the stock valves. I think it would be interesting to hear it with some GE Jan as well but I only have one of those in my collection. So in all I'm very, very impressed and this was a worthwhile upgrade to my original Cambridge Audio CP1. The NOS Mullards really do elevate it as well so it's well worth giving them a try if you can get your hands on some. To setup correctly all you need to do is find out the preferred input impedance of your stylus and if you have an MC cart it's preferred input capacitance as well, flick a couple of tiny switches on the bottom of the device to set it to those settings (all covered in the instructions) and your all set. Personally, I prefer the Subsonic filter turned of as with it on it felt like the sound was kind of missing something.
Review: Amazing - This question is always asked which is better CD or vinyl ? well I can tell you if you get one of these there’s no competition. This will bring the best out of your vinyl records. The detail is so clear and precise and bringsI out things you haven’t heard before on your records Even though I have a very good system and it sounds fantastic. This has improved it even more. So I would highly recommending this to anyone looking to rediscover vinyl for the first time or even if you’re thinking of bring it out all your old records again to play. And it’s true vinyl does sound better than CDs

## Features

- Dual mono circuitry for optimized channel separation
- Suitable for MM and MC cartridges
- Valve phono stage supplied with 2 x ECC83 valves
- Adjustable impedance and capacitance settings
- Precise RIAA equalisation in two parts, passive/active

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B075KPB1P2 |
| Best Sellers Rank | 46,539 in Electronics & Photo ( See Top 100 in Electronics & Photo ) 58 in Home Audio Preamplifiers |
| Item model number | Pro-Ject Tube Box S2 |
| Manufacturer | Pro-Ject Audio Systems |

## Product Details

- **Brand:** Pro-Ject
- **Manufacturer:** Pro-Ject Audio Systems
- **Maximum supply voltage:** 18 Volts
- **Mounting type:** Surface Mount
- **Number of channels:** 2

## Images

![Tube Box S2, High End Valve Phono Preamplifier (Black) - Image 1](https://m.media-amazon.com/images/I/71-LwDsjtEL.jpg)

## Questions & Answers

**Q: Does anyone know the difference between this project pre amp and the one on this asin: b008msmgky    there is a £75 difference in price?**
A: Hello. 

Unfortunately, the ASIN you have provided, did not produce any search results, and so with the current information, we would be unable to offer any further assistance or recommendations. You can however, contact your local Pro-Ject distributor for further advice and assistance on this matter, and they will be more than happy to provide additional help in this matter. 

I hope this helps.

**Q: Can I use this to improve phono stage on existing amp or should it be routed through aux input**
A: Hi, thanks for your question. You should connect the phono stage to an aux (sometimes known as 'line' input). Kind Regards,

**Q: I think the pre amp on the phono input on my marantz  amp has failed. could i use this through the tuner input on the amp to play vinyl ?**
A: Yes you certainly can. So record player into Project phono stage then RCA cables from Project into Aux or tuner input on your Marantz amplifier. I'd also be surprised if the Project phono stage doesn't perform better than the phono input on your amplifier.

**Q: Is this as simple as replacing this with my existing project MM ?**
A: Hello, Thank you for your enquiry. 

Yes, you should just be able to put this in your system in place of the MM, connecting the cables over and adjusting the cartridge settings accordingly. 

I hope this helps.

## Customer Reviews

### ⭐⭐⭐⭐⭐ A lovely bit of kit...
*by R***O on 25 January 2020*

Out of the box this little phono preamp sounded great. Lots of detail and warm overtones. The stock valves are ok but can definitely be upgraded. Note, for those interested the stock valves are JJ ECC83-S rebranded with the Projects own branding. These are a fine tube in their own right and certainly do the job. I had a couple of pairs of other valves in my collection to try for a bit of upgrading. My comparitive impressions were: Stock JJ: Very warm presentation definitely giving that tube sound, a rich bass with a smooth if maybe slightly rolled of treble. I can see why these were chosen as the stock valves. Tung Sol 12AX7: A more balanced sound across the range with better treble extension and detail, a tighter bass and generally more controlled presentation. I liked this setup very much. However... NOS Mullard ECC83 Short Grey Plate: I'm a bit of a fan boy of NOS Mullards already using them extensively throughout my system to be honest. So... Think all the good bits described with the tubes above all rolled up into a single valve and you get this. Balanced presentation throughout detailed highs and extended bass with a full lush midrange and that all important Mullard yummyness that draws you in. I'm not going to even bother trying the Shuguangs I have as I already know they won't even touch the stock valves. I think it would be interesting to hear it with some GE Jan as well but I only have one of those in my collection. So in all I'm very, very impressed and this was a worthwhile upgrade to my original Cambridge Audio CP1. The NOS Mullards really do elevate it as well so it's well worth giving them a try if you can get your hands on some. To setup correctly all you need to do is find out the preferred input impedance of your stylus and if you have an MC cart it's preferred input capacitance as well, flick a couple of tiny switches on the bottom of the device to set it to those settings (all covered in the instructions) and your all set. Personally, I prefer the Subsonic filter turned of as with it on it felt like the sound was kind of missing something.

### ⭐⭐⭐⭐⭐ Amazing
*by M***P on 21 January 2025*

This question is always asked which is better CD or vinyl ? well I can tell you if you get one of these there’s no competition. This will bring the best out of your vinyl records. The detail is so clear and precise and bringsI out things you haven’t heard before on your records Even though I have a very good system and it sounds fantastic. This has improved it even more. So I would highly recommending this to anyone looking to rediscover vinyl for the first time or even if you’re thinking of bring it out all your old records again to play. And it’s true vinyl does sound better than CDs

### ⭐⭐⭐⭐⭐ Nice Sound
*by A***R on 5 October 2025*

Lovely pre amp

## 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 Croatia*
*Store origin: HR*
*Last updated: 2026-01-31*