SKU: 81048113279

Pro-Ject Tube Box S3 B Phono Pre-amplifier

Sale price$465.30 Regular price$517.00
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Ships within 48 hours · Estimated delivery Jul 19 - Jul 24

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Description

Pro-Ject Tube Box S3 B Phono Pre-amplifierBalanced audiophile tube phono stage Audiophile tube warmth The Tube Box S3 B is a audiophile phono preamplifier that brings true analog warmth to your vinyl playback. It features a fully symmetrical and discrete gain stage, balanced 5 pin mini XLR input, and balanced XLR outputs. Adjust settings easily from the front panel, and enjoy clean, interference free performance thanks to its robust aluminium chassis. Available in silver or black and made in

Balanced audiophile tube phono stage

Audiophile tube warmth

The Tube Box S3 B is a audiophile phono preamplifier that brings true analog warmth to your vinyl playback. It features a fully symmetrical and discrete gain stage, balanced 5-pin mini XLR input, and balanced XLR outputs. Adjust settings easily from the front panel, and enjoy clean, interference-free performance thanks to its robust aluminium chassis. Available in silver or black and made in Europe, the Tube Box S3 B is a compact yet powerful upgrade for any serious vinyl setup.

"B" stands for balanced

The symmetrical design is the real standout feature! Connect your turntable with the 5-pin mini XLR cable & profit of the balanced signal path. Symmetrical, or also called balanced, transmissions consist of a hot and a cold (also called + and -) signal. Both signal chains effectively carry the same musical information. A true balanced gain stage can now extract the final musical information out of the +/- signals and subtract, remove, all noise that could potentially be added along the transmission. As there are two separate signal chains, we also needed two individual amplifier sections. Definitely unseen in this price range & the best and cleanest amplifier for your phono signal!

Features

  • 5-pin mini XLR balanced input
  • Balanced XLR outputs
  • Fully symmetrical & discrete gain stage
  • Easy settings adjustment on the faceplate
  • 2x ECC83 tubes (replaceable)
  • MM & MC capable
  • Dual mono design
  • Semi-passive RIAA equalisation
  • Superior low noise / low distortion
  • Aluminium casing protects against interference
  • Available in silver or black
  • Made in Europe

Technical Specifications

  • Tube assembly: 2x ECC83 (12AX7)
  • Input impedance: 10, 50, 100, 1k, 47k ohms
  • Input capacitance: 50, 150, 300, 400 pF
  • Gain (+ 6dB using XLR Out sockets): 40, 45, 60, 65 dB
  • Signal / Noise ratio MM (40dB): 97dBV, 105dBV - 'A' weighted
  • Signal / Noise ratio MC (60dB): 83dBV, 88dBV - 'A' weighted
  • THD at 1 kHz: <0,005% MM, < 0,01% MC
  • THD (20Hz-20kHz): <0,1% MM, < 0,03% MC
  • RIAA-equalization curve accuracy: <0,4dB / 20Hz - 20kHz
  • Subsonic filter: at 20Hz with 18dB/octave
  • Input: 1x 5-pin mini XLR / 1x pair RCA phono sockets
  • Line-level output: 1x pair RCA, 1x pair XLR
  • Power supply DC: 18V/1000mA
  • Power consumption: 18V/800mA DC, <0.5 W in standby
  • Dimensions: 206 x 81 x 153 (164 with sockets) mm (W x H x D)
  • Weight: 1010g 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: 81048113279

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dennis dolinsky
Birmingham, US
★★★★★ 5
Great fit, great looking
Size: 11, Color: Red
Great looking, great fit, 5 Stars
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Reviewed in the United States on May 28, 2026
T
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TojoAkuma
Houston, US
★★★★★ 5
Great pair of shoes
Size: 10, Color: Burgundy
I was a bit concerned that these shoes would be a bit large because I normally wear a size 9 1/2 and these are a size 10. But they fit perfectly. They are very light and comfortable. 👍
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Reviewed in the United States on March 10, 2026
B
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Book Lover
Birmingham, US
★★★★★ 5
My son likes them
Size: 10, Color: A Black
Basic black sneakers that are breathable and my son says are very comfortable in the summer. My 15 year old has reached a time where he gets really sweaty feet and dislikes that so I bought him these breathable shoes and he says it’s a lot better having airflow throughout his shoe and he can still run and do sporty things in them staying comfortable. Very supportive, easy to put on and fit okay although I would recommend sizing up a half size although they fit him okay there’s not much wiggle room his foot is almost at the edge and I bought his normal size. Overall cheap, supportive, comfy and worth the price.
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Reviewed in the United States on April 22, 2026
R
Verified Purchase
Reichel Family
Carnegie, US
★★★★★ 5
Super breathable, low-cost footwear
Size: 11, Color: A Black
Comfortable, super breathable, very light-weight. With this pricepoint, an easy purchase for a hot trip to Florida theme parks (despite them being black, they were still very cool compared to other sneakers). Adequate traction for rainy days. Extremely flexible - would likely be good for jogging as well. Had them for a few months now and wear them at least a couple times a week, no durability issues yet, they're still in fine shape.
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Reviewed in the United States on April 16, 2026
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R
Los Angeles, US
★★★★★ 4
OK shoes for the price.
I wasn't sure about these shoes. They look flimsy and thin, but they are actually pretty comfortable. I wouldn't say these are great for outdoor running or anything, but I wear them around the house and took them on a cruise, and, surprisingly, I walked more in them than in my normal sneakers. They fit fine and are easy to slip on. They are easy to clean, just rinse off. Breathable. They aren't the most attractive shoes I own, but they pass. Would I get them again? Probably. We will see how long they last.
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Reviewed in the United States on May 30, 2026

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