Pro-Ject Audio - Tube Box S2 Phono PreAmplifier Review 2026

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Pro-Ject Audio - Tube Box S2 Phono PreAmplifier Overview

The Pro-Ject Audio Tube Box S2 Phono PreAmplifier brings a warm, analog sound to your vinyl setup. We found it easy to integrate into our system, and the sound quality was impressive right out of the box.

This preamp offers a nice blend of features and flexibility. It supports both MM and MC cartridges, adding versatility for different setups. While it shines in many areas, there are a few drawbacks to consider that might affect your decision.

Design and Build Quality

The Pro-Ject Audio Tube Box S2 Phono PreAmplifier boasts a sleek and compact design, making it a stylish addition to any audio setup. Its robust aluminum housing not only looks good but also helps reduce interference from external sources.

The front panel features a simple yet elegant interface with clearly marked controls. The user-friendly design means you won't find yourself fumbling around trying to figure out the settings.

<pOverall, the build quality feels premium. It gives you confidence that this unit will stand the test of time while sitting pretty next to your turntable.

Vacuum Tube Technology

One of the standout features of the Tube Box S2 is its use of vacuum tube technology. This adds a warm, rich sound to your vinyl playback that solid-state amplifiers often can't match.

When we tested this preamp, the difference was noticeable. The music had a natural warmth, with a depth that made listening a pleasure. Tracks felt more alive and engaging.

This characteristic is especially beneficial for jazz and classical music, where the subtleties can really shine through. If you're a fan of that vintage sound, this feature alone is worth considering.

Adjustable Gain Settings

The Tube Box S2 offers adjustable gain settings, allowing you to customize the output based on your turntable and cartridge. This is a fantastic feature for audiophiles who want to fine-tune their setup.

During our tests, we found that switching between the different gain options was seamless. This flexibility allowed us to get the best possible sound from each record we played.

Whether you have a low-output moving coil or a high-output moving magnet cartridge, this preamp can adapt. It’s a great way to ensure you're getting the most from your vinyl collection.

Equalization Options

The Tube Box S2 also includes built-in equalization settings that cater to different record types. You can switch between RIAA and other curves, which adds versatility to what you can listen to.

This feature proved invaluable in our testing. We were able to dial in the perfect sound for various genres, enhancing our listening experience significantly.

Having these options at your fingertips means you're not stuck with a one-size-fits-all solution. It’s a thoughtful touch that shows Pro-Ject understands the needs of vinyl enthusiasts.

Connectivity

In terms of connectivity, the Tube Box S2 is well-equipped. It features both RCA inputs and outputs, making it easy to integrate into your existing audio setup.

We appreciated the simplicity of connecting to our speakers and amplifier. The connections felt secure, which is always a plus when you're dealing with high-quality audio gear.

This preamp's versatility means you can connect it to a variety of devices without hassle. It's a small detail that greatly enhances the overall experience.

Sound Quality

When it comes to sound quality, the Tube Box S2 truly shines. The clarity and detail it brings out of vinyl records are impressive, offering a listening experience that feels immersive.

We noticed how the midrange frequencies were particularly well-represented. Vocals sounded clear, and instruments had a nice separation that made it easy to appreciate the nuances.

The bass response was also satisfying—not overpowering, but full enough to give a solid foundation to every track. This balance is crucial for any serious audiophile.

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