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 17 - Jul 22

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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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4.3 ★★★★★
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M. Boychenko
Phoenix, US
★★★★★ 5
Nice casual shirt
Size: XX-Large, Color: Sky Blue
Great shirt. The size is right. The color is as expected. Comfortable. Didn't iron it yet, so can't tell how easy it is.
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Reviewed in the United States on April 21, 2026
A
Verified Purchase
Anthony
West Palm Beach, US
★★★★★ 3
Oversized sleeves, but still a good cotton shirt.
Size: Small, Color: Black
The shirt runs big at the sleeves and I'm a more slender person. I usually fit fine into a small sized dress shirt but the sleeves here remind me of airbags. The chest, shoulder and waist area fit fine. Overall, I would appreciate slim fit options or just slimmer sleeves. Everything else is great. Affordable. Its cotton and feels nice. It was packaged in an air tight seal, well done. They pre wash it and it smelled nice out the package. They have buttoned collars and I like those and they aren't the easiest to find with the colors I want. I wouldn't by again because of the sleeves but if they have a slim fit option in the future. Id take the chance and buy it again.
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Reviewed in the United States on May 21, 2026
S
Verified Purchase
S R Miller
Omaha, US
★★★★★ 5
An L shirt for a real L person.
Special Size: Standard, Size: Large, Color: Wine Red
I love this shirt! I have been an "XL" guy for decades. Got back down to "L" a year ago. Finally bought some L shirts, starting with this one. Nice fit. Good stitching, tight buttons, crisp fabric. The button-down neck is sturdy and keeps a classic shape to it after several times through the wash. Not much stretch, so buy it if you are *really* a size L. But if you used to be a size XL, and came down a year ago, get one of these. You deserve it.
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Reviewed in the United States on May 11, 2026
J
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Joe Veto
Draper, US
★★★★★ 5
Great shirt - tail could be longer - great color selection - No 1000 pins to remove!
Special Size: Standard, Size: X-Large, Color: Aroyal Blue
Favorite shirt, fits well, looks good, durable. I'd like if the shirt tail was longer. All cotton so they shrink a bit after washing and need to stretch back out. Overall, I'd like if they were a touch larger or I was a touch smaller. I love that they don't have a HUGE AMAZON BASICS label on them. And I LOVE that I don't have to spend thirty minutes removing tiny stick pins like other dress shirt makers force you to do - what a waste!
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Reviewed in the United States on February 19, 2026
K
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Kevin
Fort Morgan, US
★★★★★ 4
Reliable, well-made shirt with a slightly lighter color than expected
Special Size: Standard, Size: X-Large, Color: Navy, Special Size: Standard, Size: X-Large, Color: Navy
This Alimens & Gentle Oxford shirt is a solid, well-made option that holds up well over time. After roughly 20 wears and washes, it’s proven to be durable and fairly resistant to wrinkles, which is a big plus for a cotton button-down. Fit & Comfort: The fit runs a bit on the loose side, but it’s still comfortable and easy to wear. It’s not a slim fit, so if you prefer a more tailored look, keep that in mind. Material & Performance: The fabric is thicker than most standard dress shirts, which makes it a great choice for cooler weather. It provides a bit more structure and warmth, but it may not be as breathable in the summer months. On the plus side, it washes and irons well and maintains its shape over time. Appearance & Versatility: The shirt pairs well with both dress pants and jeans, so it works in both professional and casual settings. One thing to note — the actual color is noticeably lighter than what’s shown in the listing. In my case, I still liked the look and kept it, but it’s something to be aware of when ordering. Bottom Line: A dependable, slightly heavier Oxford shirt that’s great for fall and winter wear. Best for those who prefer a relaxed fit and don’t mind a small variation in color from the listing.
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Reviewed in the United States on April 30, 2026

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