SKU: 67804942007

Pro-Ject Tube Box DS3 B True Balanced Phono Preamplifier

Sale price$697.05 Regular price$774.50
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Description

Pro-Ject Tube Box DS3 B True Balanced Phono PreamplifierHigh End Tube Sound The Tube Boxes have 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. Cartridge loading options You can connect two turntables at the same time & easily set everything on the front plate. Input

High-End Tube Sound

The Tube Boxes have 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.

Cartridge loading options

You can connect two turntables at the same time & easily set everything on the front plate. Input settings are stored in the memory, and ranges from 40dB up to 65dB are possible. You can perfectly match it with a wide variety of cartridges and integrate it into the rest of your hi-fi system, matching the volume levels accurately to other sources like CD players or streaming devices. Load impedance can be set continuously via 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 this way.

Balanced Signal Transmission

Connect your turntable either with the 5-pin mini XLR cable or standard XLR cables & 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.

Technical 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: >87dBV -, A weighted
  • 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)
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 67804942007

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Daniel Customer
Chelsea, US
★★★★★ 4
pretty good for the price
Color: Brilliant Black, Size: Large
pretty darn good for the price. You can tell its cheap when you feel it and look close but its really not bad. Surprisingly it fit very well. (for reference Im 6' 1.5" 180 pounds and everything fit me good, except the pants that were a little baggy and the vest a little short) but for the price its good. Its nice enough you can wear it out and not feel like your wearing a Halloween costume or something.
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Reviewed in the United States on November 14, 2025
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Gladys perez
Carnegie, US
★★★★★ 5
Perfect for such a special occasion
Color: Brilliant Black, Size: Medium, Color: Brilliant Black, Size: Medium
I bought this suit for my son's graduation and was very satisfied. It looks elegant and modern, and the fit was excellent. The fabric is comfortable and of good quality—ideal for wearing for several hours. I received many compliments that day. Without a doubt, a very good choice for important and special events.
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Reviewed in the United States on May 16, 2026
J
Verified Purchase
Jesse
Grantham, US
★★★★★ 5
Feels Tailored, Perfect Fit, Fast Delivery, Zero Complaint
Color: Black, Size: Large
I honestly did not expect this level of quality ordering a suit online, especially on such short notice, but this completely exceeded my expectations. First off, the fit is incredible. The jacket feels like it was tailored specifically for me, it wraps cleanly around the shoulders and arms without being tight, and tapers perfectly at the waist. I still have full range of motion, which is rare for a fitted jacket. The one-button design gives it a modern, sleek look that really stands out. The pants are just as impressive. They fit perfectly, not too tight, not too loose, with a clean, straight fall that looks amazing with dress shoes. The length is spot on, and the overall structure makes it look very polished. I also appreciate the thoughtful details like secure closures, belt loops, and well-placed pockets. The vest was the cherry on top. It fits clean and adds an extra level of sophistication to the whole outfit. Together, the full set gives a very sharp, put-together look without feeling overdone. What really shocked me was the speed. I ordered this late at night and received it the next morning. That alone would have been impressive, but to combine that kind of delivery with this level of quality is next-level. Overall, this suit looks, feels, and fits far better than I expected at this price point. If you're hesitant about buying a suit online, this is definitely one of those rare cases where it absolutely pays off. Highly recommend.
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Reviewed in the United States on March 27, 2026
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Esther
Carnegie, US
★★★★★ 3
One piece was true to size and the other wasn’t
Color: Brilliant Black, Size: XX-Large
Looked nice and perhaps decent quality for the price, but one piece fit while the other didn’t, like I forgot which, but either the jacket fit, but the pants were too big or small or vice versa . Had to return it.
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Reviewed in the United States on May 15, 2026
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Kristin Chadwick
Natrona Heights, US
★★★★★ 5
Quality product!!!
Color: Black, Size: X-Small
This tuxedo was perfect for the price!!! Quality material!! My son is 5'10" and 145 lbs...the xsmall fit just right!!
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Reviewed in the United States on May 31, 2026

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