Pro-Ject
Pro-Ject Tube Box DS3 B
Best phono preamp for audiophiles seeking warm, balanced analog sound.
Experience the rich, detailed sound of vinyl with the Pro-Ject Tube Box DS3 B phono preamplifier. This high-performance unit combines warm vacuum tube amplification with a true balanced design for exceptional clarity and channel separation. It offers extensive flexibility, supporting both MM and MC cartridges with continuously variable input impedance loading for perfect system matching. Featuring ultra-low noise circuitry, precise RIAA equalization, and a subsonic filter, it ensures an uncompromised listening experience. The robust aluminum casing and external power supply contribute to a clean, interference-free audio signal, bringing out the best in your record collection.
$1099.00
Owner Satisfaction
4.6
/ 5
Category Rank
303
/ 466
#303 in Phono Preamps
Price vs Category Average
-84%
Below average
Amplification Type
Tube
/ Tube
Who it's for
- Audiophiles seeking a lush and natural analog listening experience
- Vinyl collectors using diverse moving magnet and moving coil cartridges
- Listeners with complex systems requiring low-noise balanced signal paths
Who should skip it
- Budget-conscious buyers looking for an entry-level phono stage
- Users preferring low-maintenance, set-and-forget audio equipment
- Owners with limited shelf space or poor ventilation options
Performance breakdown
Sonic Character
Vacuum tubes deliver a lush, organic warmth that defines high-end vinyl playback.
Cartridge Compatibility
Stepless impedance loading ensures perfect synergy with almost any phono cartridge.
Signal Integrity
True balanced circuitry effectively eliminates noise for a pristine, interference-free signal path.
Build Quality
Robust aluminum chassis provides excellent shielding and a premium, durable feel.
Channel Separation
Dual mono design creates a wide, immersive soundstage with pinpoint imaging.
System Flexibility
Three inputs and balanced XLR outputs accommodate complex, multi-turntable analog setups.
Key Specs
Amplification Type
Tube
Built-in Analog-to-Digital Converter
False
Headphone Output
False
Subsonic Filter
True
Signal-to-Noise Ratio
>87dBV ('A' weighted)
Total Harmonic Distortion
<0.03%
Power Supply Type
External
Number of Inputs
3
Features
- Warm tube amplification for detailed sound
- True balanced design with XLR connectivity
- Supports MM and MC cartridges
- Variable input impedance for precise matching
- Dual mono design for superior channel separation
- Subsonic filter removes low-frequency rumble
- Robust aluminum casing for interference protection
- External power supply minimizes noise
What customers say
Customers consistently praise the Pro Ject Tube Box DS3 B for its exceptional sound quality and remarkable versatility. Many highlight the warm, rich, and detailed audio reproduction, attributing a significant upgrade to their vinyl listening experience. The extensive adjustability for gain and impedance settings is frequently lauded, allowing users to fine tune performance for a wide array of cartridges. This flexibility ensures optimal sound matching, making it a highly regarded component for serious audiophiles seeking sonic refinement and adaptability.
Know before you buy
The balanced design uses XLR connectivity to minimize noise and interference, resulting in superior channel separation and a cleaner signal path compared to standard RCA connections. It is an ideal choice if your turntable and amplifier also support balanced inputs.
Yes, the Tube Box DS3 B is fully compatible with both MM and MC cartridges. It features adjustable settings to ensure your specific cartridge is loaded correctly for optimal performance.
Adjusting input impedance allows you to fine-tune the electrical loading of your cartridge, which directly impacts the tonal balance and clarity of your vinyl playback. The DS3 B offers stepless adjustment for MC cartridges, giving you precise control to match your specific hardware.
The subsonic filter removes ultra-low frequency vibrations, often caused by warped records or turntable rumble, that can cause your speakers to work unnecessarily hard. You should turn it on if you notice excessive woofer movement or unwanted low-end distortion during playback.
The unit uses two E88CC/6922 tubes, which are standard and widely available. While they do not require frequent maintenance, they will eventually need to be replaced after several thousand hours of use, similar to a lightbulb, to maintain peak audio quality.
No, this unit is designed strictly as a phono preamplifier to bridge the gap between your turntable and your main stereo amplifier. It does not include a headphone output or volume control.
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$1099