Pro-Ject Uni Box S3 Integrated Amplifier

The Uni Box S3 boasts a sleek, compact aluminum design, housing a powerful, fully analog pre- and power-amp. This thoughtful design ensures clear separation between analog and digital components, contributing to its timeless aesthetic. For digital audio, the integrated Cirrus Logic CS4344 DAC delivers high-resolution sound up to 24-bit/192kHz.

Streaming Powered by WiiM OS

Pro-Ject has partnered with WiiM to power the Uni Box S3's streaming capabilities with the industry-leading WiiM OS. Through the Pro-Ject Home app, you'll have access to a vast array of major and niche streaming services, along with in-app EQ functions to customise your audio. What's more, the Uni Box S3 lets you stream audio from your connected devices – like your turntable, CD player, or even your TV – to other compatible streamers throughout your home.

Versatile Inputs and Outputs

The Uni Box S3 offers a wide range of connectivity options. For analog sources, you'll find a phono RCA MM input and two line RCA inputs (perfect for a CD Box S3, for example). Digital sources like your TV or a CD transport can connect via coaxial or optical S/PDIF inputs, leveraging the internal DAC's 24-bit/192kHz resolution.

For outputs, the amplifier features 4mm gold-plated terminals delivering 40W of power, designed to provide musical sound with lifelike characteristics to your favourite headphones or speakers. Additionally, two RCA variable outputs allow you to connect a subwoofer for enhanced bass or an external power amplifier.

We endeavour to despatch same day for orders placed up to 1pm on available stock items (items with stock message "Usually dispatched within 24 hours"). Please remember to check with us first for a physical stock check if next day delivery is important to you. Any items with stock message "Usually dispatched within 72 hours" are items that we do not hold in stock but order in from the importer or manufacturer as soon as a customer order is received. Occasionally these may be delayed beyond 72 hours due to importer/manufacturer stock levels but we will inform you as soon as we can if this is the case.

UK Orders

We despatch the bulk of our UK mainland items on a 24 hour service – Free of Charge.  Non Mainland locations - Isle of Man, Isle of Wight, the Scilly Isles, the Scottish highlands and Islands, the Channel Islands and Northern Ireland may take a day or so longer and are not Free of Charge. Smaller items are delivered using Royal Mail 24 or special delivery. Larger items are delivered using a courier service such as DPD or UPS.

International Orders:

Due to the nature of our products and brand restrictions we are only able to send certain items internationally. Smaller items are delivered using Royal Mail Small Packets Airmail with International Tracked and/or Signed depending on value of item and availability of the service. Larger International shipments are sent by insured and tracked services using UPS. If there are any delays due to specific customs regulations, etc, you will be contacted by Hifisound or by the courier with a request for any further information required. Customs duties can apply for shipments to any countries outside of the UK depending on where the product you have bought is made. Customers are responsible for all taxes and duties incurred when the items enter their country.

Collect in Store or Home Install

At the request of the manufacturer some items cannot be supplied by mail order but you can click and buy them and then elect to collect them from our store or arrange a home install (if applicable). Applicable items clearly state that they are Collect in store or home install. Once ordered you will receive a message prompting you to contact us by phone or email to arrange for us to deliver and install or to reserve and collect from our store at your convenience, you will also be advised of the delivery time / stock availability as not all Home install / collect in store items are held in stock.