Pro-Ject Tube Box S3 B Phono Pre-amplifier
SKU: 60209279541

Pro-Ject Tube Box S3 B Phono Pre-amplifier

Sale price$465.30 Regular price$517.00
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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: 60209279541

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Sammy.
Waukegan, US
★★★★★ 5
Very good
Size: 38"Height × 14" Wide
It look nice and it worked very good, build strong
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 6, 2026
K
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K Younger
Charlottesville, US
★★★★★ 5
Do it yourself
Size: 38"Height × 14" Wide
I purchased a similar set to custom make a dining room table out of butcher block, and it turned out perfect. So with the left over butcher block I purchased these legs and made the perfect kitchen island to match. It is very sturdy and a great price. Everyone wants to know where I purchased it from. I also put a piece of the butcher block across the lower bars and made a lower shelf. Love love love this.
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Reviewed in the United States on December 2, 2025
T
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Tani
Bozeman, US
★★★★★ 4
Plan your project right & these will look great!
Size: 38"Height × 14" Wide
These are great legs for a table. They are sturdy and go together nicely. The painted finish is well done, meaning it doesn't scratch or peel or come off easily. Also the way things were packaged was considerate of the weight and possibility of damage during shipment. There were even extra attachment screws included which was helpful since I lost one under the dishwasher. When considering what legs to purchase for your particular table, the height, dimensions, and weight of the top all need to be factored in. I used these bar height legs under a very heavy, 7' long X 2' wide top. Common physics dictates that there will be lateral movement between the 2 "H" shaped leg sets. There HAS to be support between the 2 H leg sets to prevent that lateral movement. So these alone will not support a long table very well, because physics. This is not in any way the fault of this product. Be aware that there is more to the stability equation and be prepared to add cross bracing to your project.
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Reviewed in the United States on April 4, 2025
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Amazon Customer
Chelsea, US
★★★★★ 5
Hold my computer desk top repaired
Size: 38"Height × 14" Wide
Counter height table legs are sturdy and it holds a great amount of weight. I was easy to adjust height for the table we needed to be repaired with legs. It was a great choice in repair of computer desk. I had a desk that tore apart because of the press board siding. Took the top of of siding and repaired with these legs. I am totally satisfied
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Reviewed in the United States on October 25, 2025
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Jacob Lingeman
Fort Morgan, US
★★★★★ 2
Wobbly
Size: 38"Height × 14" Wide
Look great but they are not solid. Table is super wobbly
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Reviewed in the United States on August 21, 2025

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