SKU: 81048113279

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: 81048113279

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4.3 ★★★★★
Based on 29 reviews
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MrPasghetti
Battle Creek, US
★★★★★ 4
Nice to have
Color: Brown, Size: 10.2" x 8.4" x 1.8"
Good: It's a good sized leather tray for the price. I'm able to keep my keys, wallet, tv remote, and watch flat within the box. There's not much else to say, it's a leather tray, it just... works. It gives me piece of mind knowing that I'll always find my accessories and belongings nicely tucked into this tray. Bad: I'm a fair reviewer, if a product wows me I'll say it wows me. This does not wow me in the craftsmanship department. The product I received contains the leather tray and a leather "floor". The leather floor is a separate piece that sits at the bottom of the tray which completes the complete leather look and provides some cushion to the things inside. This leather floor did not fit perfectly within the confines of the tray. One edge sits slightly tilted upward. To be completely fair, this is a very easy fix. I assumed that the stitching was simply applied too tightly and causes the floor to 'crunch'. I simply reduced the tightness of the stitching and it's perfect now. However, I cannot give it the full 5 star rating I wanted because not everyone is keen on solving issues like this. When people order things, I assume that most people would like a product that looks and feels great straight from the box. Verdict: Would still recommend. Despite this being a somewhat niche product it really helps with quality of life. I no longer have to go looking for my keys, wallet, or tv remote between my couch cushions. I know exactly where I'll find them every time and this saves an exponential amount of time in the mornings. As a bonus, the color is really nice and dark chocolate brown which goes with most things and leather is just a nice luxury to have.
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Reviewed in the United States on June 5, 2020
D
Verified Purchase
Doc Angie
Massapequa, US
★★★★★ 5
A perfect catch y’all
Color: Dark Grey Shagreen, Size: 10.2" x 8.4" x 1.8"
I use this as a catch on on my dresser and it is sturdy and provides a bit of chicness and beauty that I can just throw all of my things in and keep it keep myself organized. It is leather, and well constructed so you can’t go wrong. And if you spill anything, just take a wet wipe and wipe it up. I highly recommend.
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Reviewed in the United States on October 31, 2025
D
Verified Purchase
DB
Natrona Heights, US
★★★★★ 5
Great looking organizer
Color: Brown, Size: 10.2" x 8.4" x 1.8"
Very nice and quality material. Masculine looking organizer; looks great on top of dresser. Perfect size. I am very pleased with this product. Highly recommend.
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Reviewed in the United States on December 29, 2025
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Verified Purchase
Ken01
Charlottesville, US
★★★★★ 5
Holds stuff nicely - classic addition for the bureau!
Color: Brown, Size: 10.2" x 8.4" x 1.8"
Ordered this as a gift for my son, who always seems to have a small pile of "stuff" accumulating on his bureau. He is not a fan of leather, so this tray was perfect! And it was a great value for the price. Ordered it in brown. It has a nice feel to it and (color-wise has a rich tone). Perfect for his keys, spare change he finds in his pockets, extra watchbands, whatever. Makes a great gift! I definitely recommend!
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Reviewed in the United States on December 27, 2022
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Verified Purchase
lmrod
San Leandro, US
★★★★★ 5
Nice design
Color: Dark Grey Shagreen, Size: 10.2" x 8.4" x 1.8"
The design is nice and doesn’t take up too much space, but it holds a lot more than I expected. The materials feel sturdy and quality, and it looks great. It's made it so much easier to stay organized with our keys and wallets.
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Reviewed in the United States on August 24, 2025

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