Pro-Ject Uni Box S3 Integrated Amplifier
- Free Mainland UK Shipping on orders over £100
- Official Hi-Fi Retailer since 1973
- Usually in stock and dispatched in 1-5 working days
We offer free delivery on all orders over £100 to mainland UK. Orders under £100 are subject to a £6.50 shipping charge.
Delivery is available across mainland UK. If you are located outside mainland UK and would like a shipping quote, please get in touch before placing your order.
We aim to dispatch in-stock items as soon as possible provided that we physically have the stock - but please note that sometimes we have to order from our supplier for certain products, in which case delivery should take place within 1-5 working days of the order being placed.
Tracking details or estimated delivery timescales will be provided once your order has been processed. If there are any delays due to stock availability, we will contact you as soon as possible with the option to wait or receive a full refund.
Please note that certain products may be subject to specific distance selling or delivery regulations. If you are unsure about a product or its delivery terms, we recommend contacting us before purchase.
You can cancel your order within 14 days of receiving your goods, in line with UK distance selling regulations. Once you’ve notified us, you have a further 14 days to return the item. Please contact us by email, phone or in writing before sending anything back.
Items must be returned in original condition and packaging, including all accessories, manuals and any promotional items. The cost of return is your responsibility and we strongly recommend insuring the goods, as refunds cannot be issued for damaged or incomplete returns. If items show excessive handling, are missing components, or cannot be resold as new, a reasonable deduction may be made.
Please note that used headphones (for hygiene reasons) and custom or special-order items cannot be returned. If you need assistance arranging a return, we’re always happy to help.
Product Summary
The Pro-Ject Uni Box S3 is a compact integrated streaming amplifier designed for customers who want a genuine all-in-one hi-fi system without giving up proper analogue design. Rather than being just another app-led streaming box, it combines Pro-Ject’s analogue amplifier know-how with modern network audio features in one neat component.
A big part of the appeal is the way it bridges traditional hi-fi and modern streaming. The Uni Box S3 keeps analogue sources such as turntables in the analogue domain, while also adding WiiM-powered streaming, Bluetooth, Wi-Fi and digital inputs for TVs and other source devices. That makes it a strong option for customers who want one compact unit that can handle vinyl, streaming and TV sound without feeling like a compromise.
It is also designed to be practical in everyday use. With a built-in MM phono stage, headphone output, remote control and the ability to stream connected sources to other compatible Pro-Ject streamers, the Uni Box S3 offers a lot of flexibility for its size. For customers wanting a compact amplifier with modern streaming convenience and real hi-fi credibility, the Uni Box S3 is an excellent choice.
Key Benefits
- All-in-one design combines integrated amplification and modern streaming in one compact unit
- Fully analogue pre and power amp design helps preserve the character of analogue sources such as turntables
- Built-in MM phono stage makes it easy to connect a turntable without needing an extra box
- WiiM-powered streaming opens up access to major music services and multi-room options
- Bluetooth, Wi-Fi, coaxial, optical and eARC inputs make it easy to connect TVs, streamers and other digital sources
- Can stream connected devices such as turntables, CD players and TVs to other compatible Pro-Ject streamers
- Headphone output adds simple private listening without needing a separate headphone amplifier
- Compact aluminium casework keeps the system neat while still feeling like a proper hi-fi component
- 2 years manufacturers warranty, extended to 3 years if registered with Pro-Ject within 4 months of purchase
Technical Specifications
Amplifier & Streaming Details
- Product Type: Integrated streaming amplifier
- Power Output: 2 x 23 W into 8 ohms / 2 x 40 W into 4 ohms (1% THD)
- Amplifier Design: Fully analogue pre and power amplifier, dual mono design principle
- Headphone Output: 70 mW at 32 ohms (1% THD)
- Analogue Inputs: 2 x pair RCA, 1 x phono MM (RCA)
- Digital Inputs: RCA coaxial, 2 x Toslink, eARC, Wi-Fi / Bluetooth streaming input
- DAC: Cirrus Logic CS4344, 24-bit / 192 kHz
- Power Amplifier Stage: Texas Instruments TPA3221DDV
- Variable Output: 1 x pair RCA
- Speaker Connections: 4 mm banana plugs, spades or bare wire
- Wireless Connectivity: Wi-Fi 5, 802.11 b/g/n/ac dual band 2.4 GHz and 5 GHz, Bluetooth 5.0, SBC, AAC
- Streaming Platform: WiiM OS
- Streaming Services: Spotify, TIDAL, Amazon Music, Qobuz, Napster, Pandora, TuneIn, Deezer and more
- Extra Features: Multi-room streaming, EQ functions, remote control, analogue volume control with motorised potentiometer
- Power Supply: 20 V / 3 A DC, 100 - 240 V, 50 / 60 Hz
- Standby Power Consumption: Less than 0.5 W
- Colour Options: Black or silver
- Made In: Europe
Weight & Dimensions
- Dimensions: 20.6 x 5.5 x 15.3 cm (W x H x D)
- Weight: 1.1 kg without power supply
What’s in the Box
- Pro-Ject Uni Box S3 integrated streaming amplifier
- Remote control
- Power supply
- Product documentation
