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 £5 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.
Amp Box S3
Key Features
• Brand new PCB concept and sophisticated topology
• Micro-sized footprint and casework for true flexibility in placement
• Improved S/N ratio with lower distortion for a more accurate performance
The Amp Box S3 is an efficient, yet powerful, compact power amplifier with true stereo hi-fi credibility. Thanks to its clever internal design it delivers a warm, inviting musical performance with the sonic characteristics of a tube amplifier.
The Amp Box S3 boasts a new PCB concept and sophisticated topology in order to achieve less distortion and a better signal to noise ratio. This audio-focused internal design is also highly efficient, with very little wasted energy. It also brings you a rich and musical sound with a touch of analogue warmth, inspired by the sonic traits of more costly valve amplifiers. By squeezing this clever technology into a deceptively small footprint, the amplifier is suited to a variety of applications.
Ideally suited to room sizes up-to 15m2, depending on the matched speakers, the Amp Box S3 can be useful for nearfield hi-fi systems, powering in-wall or in-ceiling speakers, or for enhancing the performance of existing hi-fi and home cinema systems. With one stereo RCA input, a jack output, and trigger connections, it’s also possible to stack multiple amplifiers for bi- or tri-amplified systems.
Sitting on four rubberised feet and contained within a sturdy metal casework that boasts a clean, minimalist elegance for when it’s on show, the Amp Box S3 is designed to protect itself from electronic interference and vibration. The result is a purer musical signal that is true to the original recording, all presented in a spacious and comfortable sound stage.
Additional Features
• Advanced amplifier module ensures a quality in playback that belies its size
• Stereo inputs via RCA connectors
• Speaker sockets are isolated for purity of signal
• Banana/Spade/Pin/bare wire connectors offer the maximum ease of use
• Trigger input and output for using further amp Box S3 units in tandem and Pre Box pairing
• Aluminium metal casing and rubberised feet protect against vibration and interference
• On/Off toggle switch on the front fascia for simplicity in operation
• Handmade in Europe
• Available in Black and Silver finishes
| Amp Box S3 | |
|---|---|
| Power Output | 2 x 23W/40W at 8 ohms/4 ohms (1% THD) |
| Peak Power | 2 x 50W at 4 ohms |
| Frequency Response (20Hz - 20kHz) | <-0,7dB at 4 ohms |
| Channel Separation | >-68dB at 20kHz |
| Signal to Noise Ratio | 87dBV (100dBV - 'A' weighted) at 4ohms |
| THD + N | <0,02% at 10W at 4 ohms |
| Gain | 31 dB |
| Line input sensitivity | 360mV |
| Pre In | 1 pair RCA |
| Bypass Output | Jack socket 3,5mm stereo |
| Input Impedance | 25 kohms |
| Speaker Connectors | 4mm ∅ _banana plugs, spades connectors or naked wire |
| Trigger | 12V DC switching voltage, 2-pole co-axial ∅ _2,5mm co-axial jack |
| Outboard Power Supply | 20V/3A DC, suitable for your country's mains supply |
| Dimensions (W x H x D) | 103 x 36 x 118 (136) mm |
| Weight | 385 g without power supply |
