Pro-Ject Stereo Box S3 BT 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 Stereo Box S3 BT is a compact integrated amplifier for customers who want a neat, space-saving hi-fi system without losing the flexibility to connect both wired and wireless sources. It is especially useful where a full-size amplifier would feel too bulky, but proper stereo sound is still the goal.
With two RCA line inputs and Bluetooth 5.0 with aptX HD, it makes it easy to connect traditional source components alongside wireless playback from a phone, tablet or similar device. The variable output also adds useful flexibility for customers who may want to add a subwoofer, active speakers or a second amplifier later on.
Its ultra-compact aluminium casework helps it fit easily into shelves, desks and smaller living spaces, while still offering enough power for a wide range of room-friendly speaker systems. For customers wanting a simple, elegant and genuinely practical compact amplifier, the Stereo Box S3 BT is an excellent option.
Key Benefits
- Ultra-compact design makes it easy to build a proper hi-fi system in smaller spaces
- Bluetooth 5.0 with aptX HD gives you a higher-quality wireless music option alongside wired sources
- Two RCA inputs make it easy to connect traditional hi-fi components such as CD players or streamers
- Variable output lets you add a subwoofer, active speakers or a second zone amplifier more easily
- Analogue volume control with motor driven potentiometer helps provide a more satisfying everyday user experience
- Rigid aluminium casing helps reduce interference and gives the amplifier a more premium feel
- Remote control makes day-to-day operation simple from your listening position
- Strong choice for customers wanting a compact amplifier with genuine stereo flexibility
- 2 years manufacturers warranty, extended to 3 years if registered with Pro-Ject within 4 months of purchase
Technical Specifications
Amplifier Details
- Product Type: Ultra compact integrated amplifier
- Output Power: 2 x 21 W into 8 ohms / 2 x 40 W into 4 ohms (1% THD)
- Frequency Response: Less than -1.5 dB at 20 Hz - 20 kHz into 4 ohms
- Signal to Noise Ratio: 96 dB, 100 dB A-weighted at 4 ohms
- Channel Separation: -67 dB at 10 kHz
- THD: Less than 0.12% at 5 W / 4 ohms
- Gain: 32.5 dB
- Inputs: 2 pair RCA line inputs
- Input Impedance: 25 kOhms
- Variable Output: 3.5 mm stereo jack
- Speaker Outputs: 4 mm banana plugs, spade connectors or bare wire
- Bluetooth Version: 5.0
- Bluetooth Codecs: aptX, aptX HD, A2DP profile
- Power Supply: 20 V / 3 A DC, 100 - 240 V, 50 / 60 Hz
- Standby Power Consumption: Less than 0.5 W
- Remote Battery Type: 2 x AAA 1.5 V
- Colour Options: Black or silver
- Made In: Europe
Weight & Dimensions
- Dimensions: 10.3 x 3.7 x 11.5 cm (W x H x D)
- Dimensions including sockets: 10.3 x 3.7 x 13.8 cm (W x H x D)
- Weight: 0.45 kg without power supply
What’s in the Box
- Pro-Ject Stereo Box S3 BT integrated amplifier
- IR remote control
- Power supply
- Product documentation
