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Balanced Vacuum Tube Phono Preamplifier
The Tube Box line has been an integral part of our product portfolio for many years. Now, the new Tube Box DS3-B adds balanced in- and outputs to the beloved tube amplification. This precision tube phono preamplifier benefits from outstanding circuit technology from Dr. Sykora and uses ultimate components.
You can connect two turntables at the same time and easily set everything on the front plate. Each input setting is stored in memory. Large ranges from 40dB up to 65dB are possible, allowing you to perfectly match it with a wide variety of cartridges and integrate it into the rest of your HiFi system, matching the volume levels accurately to other sources like CD players or streaming devices.
Load impedance can be set continuously via a potentiometer, a system invented by Pro-Ject Audio Systems. It allows you to seamlessly adjust the impedance during playback and immediately assess the impact of different loading options. This is necessary to find just the right load impedance for your cartridge. No other manufacturers implement this feature in such an extreme way.
Connect your turntable either with the 5-pin mini XLR cable or standard XLR cables and profit from the balanced signal transmission. Symmetrical, also called balanced, transmissions consist of a hot and a cold (also called + and -) signal. Both signal chains effectively carry the same musical information. The Tube Box DS3-B can extract the final musical information out of the +/- signals and remove all noise that was potentially added along the transmission. All components including tube output and polypropylene capacitors are audiophile grade and guarantee a breathtaking sound experience.
Features
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Balanced XLR
A balanced connection can extract the final musical information, effectively filtering out any noise from interferences stemming from our noisy, modern homes. -
E88CC Vacuum tubes
The E88CC tubes perform with low noise and microphonics. Enjoy the detailed low end paired with warm highs. -
Continuous impedance loading
Load impedance can be set continuously via potentiometer. It allows you to seamlessly adjust the impedance during playback. -
Made in EU
Made with high-quality materials, the new Tube Box DS3 B is carefully designed and handmade in Europe.
Specifications
- Tube assembly: 2x E88CC / 6922
- Input impedance: stepless 10-1000 Ohms, fix 47 kOhms
- Capacitance: 50 / 150 / 300 / 400 pF
- Gain (+6dB using XLR Out): 40 / 45 / 50 / 55 / 60 / 65 dB
- Output voltage typically: 500 mV/1kHz at 5mV/1kHz (at 40dB)
- Signal-to-noise ratio: A weighted >87dBV
- THD: < 0.03%
- RIAA curve accuracy: +/- 0.5dB/20Hz - 20kHz
- Subsonic filter: at 20Hz with 18dB/octave
- Input: 1x 5-pin mini XLR / 1x pair XLR / 1x pair RCA phono
- Output: 1x pair RCA, 1x pair XLR
- Power supply: 18V/1000mA DC
- Power consumption: max 750 mA DC / < 0.5 watt standby
- Dimensions W x H x D: 206 x 70 x 194 mm
- Weight: 1560g (without power supply)
Product Details
- Pro-Ject PJ29860284
-
Brand New : Factory Sealed
- EAN : 9120129860284
- EFLC : 14171
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Warranty
One Year Warranty
- Parts and Labour Warranty
- Canada-wide Coverage
- Pro-Ject Authorized
Returns
Easy Returns
- 14-day return window on eligible items
- Full refund issued in accordance with our return policy
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About Pro-Ject
Pro-Ject focuses on sound-first products built for music and home theater listening, where clarity, balance, and real-world usability matter. We've been carrying Pro-Ject since 2016.
Explore our current Pro-Ject selection and best sellers. We offer both new and open-box items, and everything is clearly marked. Popular categories include Turntables, Product Hardware & Accessories, Phono Preamps.
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