# Pro-Ject Amp Box S3 Stereo Amplifier

Elevate your audio experience with the Pro-Ject Amp Box S3, a compact yet powerful integrated amplifier designed to deliver high-fidelity sound.

Combining advanced amplification technology with a sleek design, the Amp Box S3 is perfect for audiophiles seeking exceptional performance in a space-saving form factor.

**FEATURES**

-   **High-Quality Amplification**: Delivers 2 x 21 watts into 8 ohms, providing clear, powerful sound with minimal distortion, ideal for a wide range of speakers.
-   **Compact Design**: The sleek and compact chassis allows for easy integration into any audio setup, saving space without compromising on performance.
-   **Versatile Connectivity**: Features RCA inputs for connecting various audio sources, offering flexibility for integrating with your existing audio system.
-   **Superior Sound Quality**: Utilises high-quality components and advanced circuitry to ensure precise and detailed audio reproduction.
-   **Efficient Power Supply**: Includes a high-efficiency power supply that provides stable and clean power, enhancing overall sound quality and performance.
-   **Elegant Aesthetics**: Available in a stylish finish that complements any decor, adding a touch of sophistication to your audio setup.
-   **Durable Construction**: Built with premium materials to ensure longevity and reliable performance, protecting your investment over time.

Upgrade your audio system with the Pro-Ject Amp Box S3, offering high-quality amplification, versatile connectivity, and a compact design for an exceptional and immersive listening experience.

###### Specifications

-   **AMPLIFIER TYPE:** Stereo Power Amplifier
-   **AMPLIFIER CLASS:** D
-   **POWER OUTPUT (4Ω):** 2 x 40 / 50 W
-   **POWER OUTPUT (8Ω):** 2 x 23 W
-   **AMPLIFIER FREQUENCY RESPONSE (20 - 20,000HZ):** -0.7 db
-   **CHANNEL SEPARATION:** > -68dB @ 10kHz
-   **THD:** 0.02 %
-   **SIGNAL TO NOISE RATIO:** 87 dB
-   **RCA INPUT(S):** 1
-   **FIXED ANALOGUE OUTPUT(S):** 1 x 3.5mm Stereo Jack
-   **TRIGGER CONNECTION:** Y
-   **ENCLOSURE MATERIAL:** Aluminium
-   **EXTERNAL POWER SUPPLY RATING:** 20V-3A DC
-   **DIMENSIONS (W X H X D):** 103 x 36 x 136 mm
-   **WEIGHT:** 0.385 kg
-   **Warranty:** 2 Years

## Details

- **Price:** 269.0 GBP
- **Vendor:** Pro-Ject
- **Type:** Amplifiers
- **Tags:** BLACK5, SALE5

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Black | 269.00 GBP | In stock |
| Silver | 269.00 GBP | In stock |

## Images

- Pro-Ject Amp Box S3 Stereo Amplifier - K&B Audio
- Pro-Ject Amp Box S3 Stereo Amplifier - K&B Audio
- Pro-Ject Amp Box S3 Stereo Amplifier - K&B Audio

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> Source: [K&B Audio](https://www.kbaudio.co.uk/products/pro-ject-amp-box-s3-amplifier)
> Updated: 2026-04-29