# Pro-Ject Stereo Box S3 BT Amplifier

The Pro-Ject Stereo Box S3 BT is a compact yet powerful integrated amplifier designed for modern audio enthusiasts who value high-fidelity sound and versatile connectivity options.

Combining advanced amplification technology with convenient wireless streaming, this amplifier delivers exceptional performance while seamlessly fitting into any audio setup.

**FEATURES**

-   **High-Quality Amplification**: Provides 40 watts per channel into 4 ohms, delivering powerful and clear audio performance suitable for a wide range of speakers.
-   **Bluetooth Streaming**: Equipped with Bluetooth 5.0 technology, allowing you to stream music wirelessly from your smartphone, tablet, or other Bluetooth-enabled devices with high-quality aptX support.
-   **Versatile Connectivity**: Includes multiple inputs such as RCA, 3.5mm AUX, and phono input for connecting turntables, offering flexibility for various audio sources.
-   **Compact Design**: The sleek and compact chassis makes it easy to integrate into any audio setup, saving space while maintaining high performance.
-   **User-Friendly Interface**: Simple and intuitive controls with a clear front panel display make it easy to navigate and adjust settings.
-   **Elegant Aesthetics**: Features a stylish design that complements any decor, making it a visually appealing addition to your home audio system.
-   **Robust Construction**: Built with high-quality materials for durability and longevity, ensuring reliable performance over time.

Upgrade your audio experience with the Pro-Ject Stereo Box S3 BT, offering high-quality sound, versatile connectivity, and the convenience of wireless streaming in a compact and elegant package.

###### Specifications

-   **AMPLIFIER TYPE:** Integrated Amplifier
-   **AMPLIFIER CLASS:** D
-   **POWER OUTPUT (4Ω):** 2 x 40 W
-   **POWER OUTPUT (8Ω):** 2 x 21 W
-   **AMPLIFIER FREQUENCY RESPONSE (20 - 20,000HZ):** <-1.5 db
-   **CHANNEL SEPARATION:** -67dB @ 10kHz
-   **THD:** <0.12 %
-   **SIGNAL TO NOISE RATIO:** 96 dB
-   **RCA INPUT(S):** 2
-   **BLUETOOTH VERSION:** BT 5.0
-   **BLUETOOTH CODECS SUPPORTED:** aptX and aptX HD
-   **VARIABLE ANALOGUE OUTPUT(S):** 1 x 3.5mm Stereo Jack
-   **ENCLOSURE MATERIAL:** Aluminium
-   **EXTERNAL POWER SUPPLY RATING:** 20V-3A DC
-   **DIMENSIONS (W X H X D):** 103 x 37 x 138 mm
-   **WEIGHT:** 0.45 kg
-   **Warranty:** 2 Years

## Details

- **Price:** 359.0 GBP
- **Vendor:** Pro-Ject
- **Type:** Amplifiers
- **Tags:** BLACK5, SALE5

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Black | 359.00 GBP | In stock |
| Silver | 359.00 GBP | In stock |

## Images

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

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