A cube measuring 8 cm on each side, 160 grams on the scale, yet everything you need to connect an amplifier or active speakers to today’s streaming services. The AIO C belongs to the connected range from French manufacturer Triangle, based in Soissons since 1980. This small brushed aluminum box receives music via Wi‑Fi or Ethernet and sends it to your existing system, in analog or digital form.
A box designed to disappear
The AIO C’s format stands out from most network players on the market. While many adopt half-width or standard hi‑fi electronics sizing, Triangle has opted for a miniature footprint: 80 × 80 × 20 mm. The reduced size lets you slide the device behind furniture or next to an amplifier without the slightest integration issue.
The brushed aluminum chassis (silver finish) is not just about looks. The metal provides proper heat dissipation for the onboard electronics and gives a feeling of solidity you wouldn’t necessarily expect from such a compact device. The supplied Wi‑Fi antenna screws onto the back and sticks out by about 10 cm. It remains the only visible element if you hide the box behind your setup.
Two outputs, two philosophies
The AIO C offers a 3.5 mm mini‑jack output (analog) and an optical output (digital). The former suits amplifiers without a digital input or active speakers equipped with an auxiliary input. Triangle also supplies a jack/jack cable and a jack/RCA cable to cover the most common scenarios.
The optical output is intended for systems equipped with an external DAC or an amplifier with built‑in conversion. Maximum resolution differs depending on the path used: Wi‑Fi allows streams up to 24‑bit / 192 kHz, while the optical output tops out at 24‑bit / 44 kHz. This limitation is due to the specifications of the optical S/PDIF protocol, not to the AIO C itself.
Access to platforms and the local network
The Triangle AIO app (available on iOS and Android) centralizes control. It provides access to the main streaming services: Spotify, Deezer, Qobuz, Tidal, and Amazon Music. Web radios are handled via the TuneIn catalog. For files stored on a NAS or computer, the AIO C relies on UPnP/DLNA protocols.
Owners of Apple devices have an alternative: AirPlay. The protocol allows you to send audio from any app (Apple Music, YouTube, podcasts) directly to the AIO C without going through the Triangle app. Spotify Connect works similarly for subscribers to the Swedish service.
The AIO C supports lossless formats (FLAC, WAV, ALAC, APE) as well as compressed formats (MP3, AAC). Playback remains smooth on a standard 2.4 GHz Wi‑Fi network. For a more stable connection, especially in a radio‑saturated environment, the 10/100 Mbps RJ45 Ethernet port offers a wired solution.
A building block in a multiroom system
AIO technology is based on the Linkplay platform, shared with other manufacturers such as Advance Paris. The advantage: the AIO C can join a multiroom network that includes AIO 3 speakers, AIO Twin pairs, or the AIO Pro A50 amplifier. The theoretical limit is 5 devices over Wi‑Fi and 10 over Ethernet.
In practice, you can play the same music in several rooms or different sources depending on the zones. The Triangle AIO app manages grouping and volume for each device. Latency between speakers remains imperceptible during synchronized playback.
What to keep in mind
The AIO C does not include Bluetooth. Triangle’s deliberate choice favors Wi‑Fi for its higher bandwidth but rules out quick connection from a smartphone without prior network setup. Initial installation therefore must go through the app and connection to the home network.
Power is supplied via a USB power adapter (included) and a Micro‑USB cable. The Micro‑USB format, less common today than USB‑C, is still functional but a bit dated. The lack of an internal battery requires a permanent power source.
No, the AIO C has no built‑in amplification. It must be connected to an amplifier or to active speakers (speakers with built‑in amplification). Triangle offers the AIO Pro A50 for those looking for a device that combines streamer and amplification.
Can the AIO C be used without the Triangle app?+
Partially. AirPlay and Spotify Connect work independently of the Triangle app, directly from the native Apple or Spotify apps. However, access to other streaming services (Deezer, Qobuz, Tidal, Amazon Music), webradios, and local files requires the Triangle AIO app.
Does the AIO C support 5 GHz Wi‑Fi?+
No, the AIO C connects only via 2.4 GHz Wi‑Fi (802.11 b/g/n standard). This band offers better range than 5 GHz but can be more prone to interference in crowded environments. The Ethernet connection remains available to avoid this issue.
What is the difference in audio quality between the jack output and the optical output?+
The jack output uses the AIO C’s built‑in digital‑to‑analog converter (DAC). The optical output sends the raw digital signal, leaving conversion to your amplifier or an external DAC. If your equipment has a quality DAC, the optical output lets you take advantage of it. Maximum resolution via optical, however, remains limited to 44 kHz.
Can the AIO C be paired with multiroom devices from other brands?+
The AIO C uses the Linkplay platform, also found in other manufacturers’ products such as Advance Paris. Linkplay‑compatible devices can theoretically join the same multiroom network, subject to software compatibility. Check the documentation of the devices in question to verify interoperability.
Can it play MQA files?+
The AIO C does not decode the MQA format. MQA files are played, but without the format’s characteristic “unfolding”: they stay at their base resolution (generally 44.1 or 48 kHz). To get the full benefit of MQA, you need a device with dedicated decoding.
User reviews
Amer
Does the job for its concept. But the internet connection can drop and be difficult to reestablish. Moreover, there is a delay of about 2 seconds in playback, which I find quite significant.
Comment from January 25, 2024 — Experience from April 12, 2020
Automatically translated — Show original (French)
Fait le job pour son concept. Mais la connexion internet peut se couper et être difficile à rétablir. De plus, il y a un délai d'environ 2 secondes en playback, ce que je trouve assez important.
Jean-Claude
It conforms to the specifications and the Wi-Fi connection works perfectly.
Comment from June 01, 2023 — Experience from May 21, 2023
Automatically translated — Show original (French)
C’est conforme aux caractéristiques et la connexion wifi fonctionne parfaitement.
Yves
Compact, easy to install, good sound quality.
Comment from February 10, 2023 — Experience from February 08, 2023
Automatically translated — Show original (French)
Compact, installation facile, bonne qualité de son.
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