Pro-Ject Amp Box S3 Power 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 Amp Box S3 is an ultra-compact stereo power amplifier designed for customers who want proper hi-fi amplification from a unit that is easy to place almost anywhere. It is especially well suited to smaller systems, desktop setups and room-friendly speaker systems where a full-width power amplifier would feel unnecessary or too bulky.
A big part of the appeal is the way it combines a very small footprint with a more musical, more substantial sound than its size might suggest. Pro-Ject has designed it with a new PCB concept and refined amplifier topology to reduce distortion and improve signal-to-noise performance, while also aiming for a richer and more inviting presentation.
It is also a very flexible option for customers building a simple separates system. With a single stereo RCA input, efficient operation and a solid metal case, it works well as a compact upgrade for streamers, preamps and desktop audio systems alike. For customers wanting a neat, capable and genuinely hi-fi small power amplifier, the Amp Box S3 is an excellent choice.
Key Benefits
- Ultra-compact design makes it easy to add proper stereo amplification in smaller spaces
- Strong power output helps it partner a wide range of room-friendly speakers confidently
- Refined amplifier topology is designed to reduce distortion and improve overall clarity
- Compact size makes it a strong choice for desktop audio, smaller hi-fi racks and second systems
- Efficient operation helps deliver good performance with lower wasted energy
- Metal casing helps protect the electronics from vibration and outside interference
- Simple stereo RCA input makes it easy to partner with streamers, preamps and other source devices
- Strong option for customers wanting a small power amplifier with genuine hi-fi character
- 2 years manufacturers warranty, extended to 3 years if registered with Pro-Ject within 4 months of purchase
Technical Specifications
Amplifier Details
- Product Type: Micro audiophile stereo power amplifier
- Output Power: 2 x 23 W into 8 ohms / 2 x 40 W into 4 ohms / peak 2 x 50 W into 4 ohms
- Amplifier Type: Class D
- Frequency Response: 20 Hz - 20 kHz (+0 dB / -0.2 dB)
- Signal to Noise Ratio: 87 dB at 4 ohms
- THD: Less than 0.03% at 10 W / 4 ohms
- Channel Separation: -67 dB at 10 kHz
- Gain: 31 dB
- Inputs: 1 x stereo RCA input
- Input Impedance: 25 kOhms
- Speaker Outputs: 4 mm banana plugs, spades or bare wire
- 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: 10.3 x 3.7 x 11.8 cm (W x H x D)
- Dimensions including sockets: 10.3 x 3.7 x 13.5 cm (W x H x D)
- Weight: 0.395 kg without power supply
What’s in the Box
- Pro-Ject Amp Box S3 power amplifier
- Power supply
- Product documentation
