Pro-Ject
Pro Ject Tube Box S2 Pure Tube Phono Preamplifier
Best tube preamp for vinyl enthusiasts seeking warm, customizable analog sound.
Experience the warm, rich sound of vinyl with the Pro-Ject Tube Box S2. This pure tube phono preamplifier is designed for audiophiles, delivering a characteristic tube warmth to your music. It expertly handles both MM and MC cartridges, offering great flexibility for your turntable setup. Featuring a double mono construction for superior channel separation and a subsonic filter to eliminate rumble, the Tube Box S2 ensures a clean and immersive listening experience. Its durable aluminum and metal sandwich chassis provides excellent shielding and longevity.
$617.28
Owner Satisfaction
4.7
/ 5
Category Rank
133
/ 466
#133 in Phono Preamps
Price vs Category Average
-91%
Below average
Amplification Type
Tube
/ Tube
Who it's for
- Vinyl listeners seeking rich, classic analog sound signatures
- Audiophiles using diverse MM or MC cartridge collections
- Minimalists requiring high-end performance in a small footprint
Who should skip it
- Users who frequently swap cartridges and prefer accessible controls
- Budget-conscious owners avoiding recurring maintenance expenses
- Listeners sensitive to background noise or vibration interference
Performance breakdown
Sonic Warmth
Delivers the classic, lush harmonic richness expected from vacuum tube amplification.
Cartridge Versatility
Seamlessly toggles between MM and MC setups for diverse turntable configurations.
Channel Separation
Double mono design creates a wide, precise soundstage for immersive listening.
Build Integrity
Sturdy metal sandwich chassis provides effective shielding against external electrical interference.
Sound Customization
Interchangeable tubes allow enthusiasts to fine-tune the audio profile to taste.
Noise Suppression
Integrated subsonic filter effectively cleans up low-frequency rumble from older records.
Key Specs
Amplification Type
Tube
Cartridge Support
MM (Moving Magnet) and MC (Moving Coil)
Tube Type
ECC83 (Interchangeable)
Construction
Aluminum and metal sandwich housing
Feature
Subsonic filter switch included
Design
Double mono construction
Features
- Pure tube amplification for warm, rich audio
- Supports MM and MC cartridges
- Excellent channel separation with double mono design
- Subsonic filter removes low-frequency noise
- Customizable sound with interchangeable tubes
- Durable, shielded metal housing
What customers say
Customers consistently praise the Tube Box S2 for delivering exceptional sound quality, highlighting the rich, warm, and detailed sonic signature that only pure tubes can provide. Reviewers frequently note that this unit offers tremendous value, performing far above its price class and competing favorably with significantly more expensive high fidelity components. The compact, robust design also receives positive mentions, reinforcing the overall sense of premium quality and reliability.
Know before you buy
The Tube Box S2 uses vacuum tubes to provide a distinctively warm, rich, and harmonic sound profile that many listeners find more natural and engaging than solid-state alternatives.
Yes, the Tube Box S2 is fully compatible with both MM and MC cartridges, making it a versatile choice if you decide to upgrade your turntable's cartridge in the future.
The double mono construction separates the left and right channels entirely, which significantly improves channel separation and results in a more precise, expansive soundstage.
The subsonic filter is highly recommended if you notice your woofers vibrating or 'pumping' during playback, as it effectively removes low-frequency rumble caused by warped records or turntable vibrations.
Yes, the ECC83 tubes are interchangeable. This allows you to experiment with different brands or 'tube rolling' to fine-tune the sonic character of your system to your personal preference.
The aluminum and metal sandwich housing provides essential shielding against electromagnetic interference and radio frequency noise, ensuring that your audio signal remains clean and free from external distortion.
Still have a question?
Ask Hayley anything about this product before you decide.
Ready to buy?
$617