SKU: 44271956117

Pro-Ject Uni Box S3 Integrated Streaming Amplifier

Sale price$647.55 Regular price$719.50
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Ships within 48 hours · Estimated delivery Jul 18 - Jul 23

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Description

Pro-Ject Uni Box S3 Integrated Streaming AmplifierAnalogue and streaming done right The Uni Box S3 dares to break away from the norm, redefining what a modern streaming amplifier can be. While many amplifiers are dominated by deeply integrated streaming tech compromising their core design the Uni Box S3 takes a different path. The Master of Analogue & Digital The Uni Box S3 masterfully bridges the worlds of analogue and streaming. Your analogue sources like turntables are not digitised, preserving

Analogue and streaming done right

The Uni Box S3 dares to break away from the norm, redefining what a modern streaming amplifier can be. While many amplifiers are dominated by deeply integrated streaming tech – compromising their core design – the Uni Box S3 takes a different path.

The Master of Analogue & Digital

The Uni Box S3 masterfully bridges the worlds of analogue and streaming. Your analogue sources - like turntables - are not digitised, preserving their rich and lifelike sonic character. With a fully analogue pre- & and power amp design, every nuance of your music is delivered with breathtaking punch and dynamic precision. At Pro-Ject Audio Systems, our mastery of analogue hardware design allows us to craft an astonishingly powerful amplifier within the sleek, compact aluminium case of the Uni Box S3. All this power remains usable entirely without a mobile app or the need to constantly update software.

Market leading streaming

Partnering with WiiM, the Uni Box S3 streaming technology is powered by the industry leading WiiM OS™. The Cirrus Logic CS4344 DAC offers a high quality resolution of up to 24bit and 192kHz.

With the Pro-Ject Home app you control the streaming options on input 8 - the streaming input. Setting up the WiFi connection is a breeze. Just open the app and it automatically detects your new Uni Box S3 and walks you through the setup process. Comfortably reset the WiFi connection via long press of the Stream button on the front panel.

Technical Specifications

  • Power output: 2x 23W / 40W at 8 / 4ohms (1% THD)
  • Frequency response (20Hz - 20kHz): < 0,4 - 0,9dB @4ohms
  • Channel separation: - 67dB at 10kHz
  • Signal to noise ratio: 94dB (9dB-‚A‘ weighted) @4ohm
  • THD: < 0,05% at 10W / 4 ohms
  • Headphone amplifier: 70mW at 32ohm (1%THD)
  • Analogue inputs: 2x pair RCA, 1x phono MM (RCA)
  • Digital inputs: RCA coax, 2 x Toslink, eARC, WiFi/BT
  • Power amplifier: Texas Instruments TPA3221DDV
  • DA-converter: Cirrus Logic CS4344 24bit/192kHz
  • Variable output: 1x pair RCA
  • Speaker connectors: 4mm Ø banana plugs, spades connectors or naked wire
  • Wireless connectivity: Wi-Fi 5, 802.11 b/g/n/ac 2.4 G and 5G dual bands, Bluetooth 5.1, SBC and AAC
  • Power supply: 20V/3A DC; 100 - 240V, 50/60Hz
  • Standby Power consumption: < 0,5 watts
  • Dimensions WxHxD: 206x55x153 (176mm with sockets)
  • Weight: 1100 g 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: 44271956117

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4.4 ★★★★★
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kkl
Charlottesville, US
★★★★★ 5
Very good product
Size: Medium, Color: (001) Black / Black / Pitch Gray
I purchased these to wear inside lowcut slip on casual shoes, I don't particularly like to not wear socks in my shoes for hygienic reasons. Prior to purchasing these socks, all I could find were those made of very light beige hosiery type material , and my slip on shoes would slide around a bit. These are light weight and breathable athletic type material, with a very good gripper strip at the heel. One pair of my slip on casual shoes have a particularly lower cut in the toe area, but the shoe is black and I chose the black color and though I see a hint of the sock there, it matches and does not detract from the look of the casual solid black shoe
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 15, 2026
A
Verified Purchase
Anna Wylda
Charlottesville, US
★★★★★ 5
They stay out! No more sock wads!
Size: Medium, Color: (100) White / White / Mod Gray
Best no show socks ever made!!!!! I've been struggling for 2 years to find ones that actually stay on your foot, even other national brands, and I just became content wearing my sneakers without socks. They ALWAYS slid down into my show & I ended up walking on a wad of sock until I could fix it...or usually just took them off after a couple of tries. Enter Under Armor!!! They a mid weight, but not very thick & still breathable. They work too by actually staying on your foot! Not once have they slid down into my show!! Very comfortable but they could be a little more affordable.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 1, 2025
R
Verified Purchase
Rebekah
Louisville, US
★★★★★ 5
Love!
Size: Large, Color: (100) White / White / Mod Gray
Ive tried so many no show socks but I love these. This is the 3rd set I've bought. They never slip off and the material is thin and breathable. Perfect for working out.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 2, 2026
B
Verified Purchase
Becky
Lake Worth, US
★★★★★ 5
True no-show socks that don’t slide down!
Size: Medium, Color: (100) White / White / Mod Gray, Size: Medium, Color: (100) White / White / Mod Gray
This is the first pair of no-show socks I’ve tried that actually don’t slide down into my shoes. Trust me… I have tried lots of different pairs and this is the one! They fit perfectly. They’re not too thick and they’re obviously durable because I wash them after each wear, so daily.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 21, 2026
R
Verified Purchase
Raquel Hall
Birmingham, US
★★★★★ 4
Great fit but expensive
Size: Medium, Color: (252) Blush Beige / White / Castlerock
These are really great socks. I love them, but they are definitely pricey.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 30, 2026

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