Pro-Ject’s New Affordable Amplifier Breathes New Life Into Old-School Hi-Fi Speakers

The beloved Austrian audio maker just doubled down on affordable hi-fi.

Black wireless audio transmitter with antenna and gold-plated connectors next to a white speaker's rear panel.

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Published April 29, 2026

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Pro-Ject has had a hot start to 2026. So far, it has introduced the Debut Reference 10, the most high-end (and expensive) turntable in its popular Debut range.

Additionally, the famed Austrian audio manufacturer has released a pair of headphone amplifiers and the Pre Box S3, a compact stereo preamplifier that serves as the “control center” for your home hi-fi system.

Now, Pro-Ject is introducing two new products aimed at adding streaming to your old-school hi-fi system. Meet the Stream Box E and the Wireless Box E.

One streamer, one streaming amp

White bookshelf with vinyl records, a white speaker, silver audio equipment with antennas, and a white table lamp. — The Stream Box E (the little box to the right) is a compact streaming DAC.

Both of Pro-Ject’s newest hi-fi components, the Stream Box E and the Wireless Box E, bring Wi-Fi streaming capabilities to traditional hi-fi systems, but they work in different ways.

The Stream Box E is the more straightforward of the two. It’s a music streamer designed to pair with your current integrated amplifier and passive speaker setup. And thus, it allows you to stream high-resolution audio over Wi-Fi to that system.

Additionally, the Stream Box E can serve as a digital preamplifier with a power amplifier.

Hand holding a black wireless audio transmitter near the back panel of a white speaker on a gray surface. — The Wireless Box E is a streaming amplifier that connects directly to the back of a passive loudspeaker.

Passive speakers, made active

The more interesting (at least, in my opinion) of the two components is Pro-Ject’s Wireless Box E.

It’s a streaming amplifier that’s designed to breathe new life into your old passive speakers, but unlike other streaming amplifiers, the Wireless Box E connects directly to the rear speaker terminals. Sort of like a backpack for your bookshelf speaker.

Dark wood speaker cabinet with a black wireless receiver box attached to the front and a circular port above it. — The Wireless Box E is optimized to work with Pro-Ject’s own loudspeaker range, as well as other loudspeakers with that support direct terminal mounting.

Wooden speaker with a wireless receiver box and connected speaker wires on a gray surface. — For non-Pro-Ject loudspeakers, the company sells an extension cable called the Connect it LS-E Flex.

The Wireless Box E can work as a standalone streaming amp, turning a single passive bookshelf speaker into an active one that supports streaming.

However, it’s really designed to work in a stereo pair. And yes, this means you need two Wireless Box E (so one connected to the back of each speaker). They then pair wirelessly, eliminating the need for speaker cables. And because two Wireless Box E pair wirelessly together, it gives you greater freedom to place the bookshelf speakers .

From there, you can then stream high-resolution audio over Wi-Fi to them.

Black rectangular wireless audio device with gold speaker terminals and control buttons on top. — Each Wireless Box E is capable of driving 25-watt (into 8 ohms) or 50-watt (into 4 ohms).

Powered by WiiM

Pro-Ject’s Stream Box E and Wireless Box E work in different ways, clearly. But as far as streaming capabilities, they are exactly the same.

Each is powered by WiiM OS (that’s right, both are collaborations between Pro-Ject and WiiM, the rising force in multi-room streaming) and supports Spotify Connect, Tidal Connect, and Qobuz right out of the box.

The only real downside is that, like most of WiiM’s streaming amplifiers and speakers, neither of Pro-Ject’s new streamers supports AirPlay, which is a bummer (but not a deal breaker) for Apple users.

Two black rectangular electronic devices labeled "Stream Box E" with buttons and an antenna, placed on a white surface next to a smartphone displaying a music app. — Both streamers run WiiM OS and are compatible with Pro-Ject’s Home app. Pictured: Stream Box E.

Small black and white streaming device labeled "Stream Box E" with an antenna on a white shelf. — Both come in either black or silver finishes.

Availability and pricing

At the time of writing, both of Pro-Ject’s streamers are only available in the UK and EU, with pricing in those regions.

The Stream Box E costs £159 (roughly $215), while the Wireless Box E costs £199 (roughly $215). Both come in either black or silver models.

Black and silver wireless audio transmitter with antenna and gold-plated connectors on a white background.

Pro-Ject Wireless Box E

$270 at Pro-Ject

Compact black and silver streaming device with antenna and three front buttons labeled minus, play, and plus.

Pro-Ject Stream Box E

$200 at Pro-Ject

About the Author: Tucker Bowe has been on Gear Patrol’s editorial team since 2014. With a passion for consumer tech and hi-fi, he tracks everything from headphones and turntables to smartphones and wearables. If it lights up or makes noise, he probably covers it.

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