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Atoll Electronique SDA300 Signature
STREAMER / DAC / INTEGRATED AMPLIFIER
The SDA300 Signature is designed to reproduce the integrity and complexity of musical textures with great fluidity. It offers free access to online radio stations and lets you play live, in high definition, on the main streaming platforms. It is open to your entire network and has very complete connectivity. It converts the digital signal to reproduce your audio files with striking realism. As an all-in-one concept, it goes even further by functioning as a complete music player and integrated amplifier, using the amplifier section of the IN300.
- 8 mm brushed aluminium front panel.
- 2 toroidal transformers of 440 VA each (audio) + 2×4.5 VA + 3.2 VA.
- Total of capacitors: 65 800 µF.
- 2×150 Wrms / 8Ω.
- MOS-FET double push-pull power stage.
- High-quality, MKP technology link capacitors, shielded in a metal box.
- Filter capacitors: 8×6800 μF, high-quality, low ESR, designed
explicitly for ATOLL. - BURR BROWN PCM1792A converter:
– Dynamic: 129 dB.
– Signal/Noise ratio: 129 dB. - 5″ TFT LED colour graphic display (800*480).
- Discrete component audio stages without negative feedback in pure Class A.
- Analog volume management (switched resistors) that can be bypassed.
- Specific power supply dedicated to the audio stages.
- Specific power supply dedicated to the analogue digital audio converter.
- Accepted resolutions: PCM up to 24 bits/192 kHz and DSD64 and DSD128.
- Playback of audio files present on the network (DLNA and UPnP compatible) in a wired RJ45 or Wi-Fi connection.
- Display of names, tags, resolutions and album covers.
- “Gapless” system (no cut between pieces).
- Possibility to create playlists.
- USB-A file systems: FAT32, NTFS, EXT2/3/4.
- ATOLL “streamer” remote control supplied as standard.
- ATOLL Signature 2” App (Android and IOS).
CONNECTIVITY
Inputs
2 Analog Inputs – 2 coaxial S/PDIF (24 bits/192 kHz PCM).
2 Toslink optical S/PDIF inputs (24 bits/192 kHz PCM).
2 USB-A inputs (1 front and 1 rear).
1 RJ45 network socket.
1 Bluetooth® receiver (antenna).
Outputs
Speakers.
1 Pre-out output.
1 Coaxial S/PDIF output.
1 S/PDIF optical Toslink.
1 Trigger output (12V).
1 Headphone output on the front panel (Ø 6,35 mm – 1/4″).
1 Wi-Fi antenna (802.11b/g/n).
The SDA300 Signature offers excellent control with Apple or Android apps, or the included remote control.
The stylish 5″ TFT colour display gives the user the correct information about the device’s functions and shows cover art
and song details.
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Professional Reviews 92/100
Deliciously Crispy
Sound Quality
93/100
Build Quality
89/100
Features Connectivity
90/100
Value for Money
93/100
The powerful, highly resolving SDA300 Signature pairs confident loudspeaker drive with streaming convenience, delivering tight bass, crisp timing, and a clean, uncoloured midrange that stays engaging across genres. The Ear Editor praises its wide soundstage, strong dynamics, and impressive detail, while the feature set and build quality make it a compelling one-box hub.
What Reviewers Are Saying
Pros
Delivers tight, full-bodied bass with strong control and convincing dynamics, even into demanding 4-ohm loads.
Offers a clean, uncoloured midrange with excellent detail retrieval and precise imaging across a wide soundstage.
Combines broad streaming support, a capable built-in DAC, and easy-to-use app-based browsing in a well-engineered chassis.
Represents strong value, with performance that can sound more expensive than its price implies.
&
Cons
Lacks Apple AirPlay at present, which may frustrate listeners who rely on that streaming method.
SOUND QUALITY PERFORMANCE 93/100
Reviewers consistently praise the SDA300 Signature for its clarity, control, and engaging presentation. The sound is described as revealing, clean, and uncoloured, with strong timing, excellent bass control, and a presentation that keeps details easy to follow without sounding shrill.
Transparency Resolution
94/100
The reviews repeatedly highlight an 'incredible level of midrange and treble detail' and 'superb' definition, with voices and instruments coming through 'loud and clear.' Reviewers also describe the reproduction as precise and uncoloured, with a very low sense of haze or blur.
Tonal Balance Musicality
92/100
The tonal balance is described as clean, refreshing, and uncoloured, yet also warm and inviting rather than dry or analytical. Reviewers say the midrange is never shrill or unpleasant, and the amp keeps a musical coherence that makes listeners want to continue listening.
Dynamics
95/100
Dynamics are one of the strongest themes in the reviews, with comments about 'immense sense of control,' 'superb dynamics,' and crescendos that remain forceful. It is also credited with strong bass power, convincing timing, and enough drive to handle difficult loudspeaker loads confidently.
Soundstage Imaging
91/100
Imaging is praised as 'pinpoint' across an 'immense soundstage,' and one reviewer notes that the stage sounds wider and deeper than the earlier SDA200. The reviews support a spacious, precise presentation, though they say less about layering depth and image density than about width and focus.
Assessments of Build Quality, Usability, and Overall Propositions.
Build Quality
89/100
Reviewers describe it as 'superbly engineered' and 'well built,' and they mention that Atoll fully assembles, tests, and finalizes the units in its workshops. At the same time, the direct construction detail is limited, so the reviews support solid confidence rather than extravagant claims.
Features Connectivity
90/100
This is a well-equipped streaming integrated amplifier, with high-definition streaming support, twin USB connections, and a built-in DAC based on the Burr-Brown PCM1792. Reviewers also note the lack of Apple AirPlay, but overall the feature set is broad and practical for a modern one-box system.
Value for Money
93/100
The reviews are strongly positive on value, saying the amp offers 'a lot for the money' and that it could sound like a system costing many times more. Reviewers also note that buying the equivalent parts separately from Atoll or other reputable brands would cost considerably more, which makes the pricing look very competitive.
Reviews
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Authorized dealers for Atoll Electronique SDA300 Signature
- A Tube High Fidelity — in-store — Almere, Flevoland, Netherlands (website)
- Absolute Audio - Canada — in-store — Calgary, Alberta, Canada (website)
- Akustik Strauss — in-store — Garmisch-Partenkirchen, Bayern, Germany (website)
- Alpha High End — online and in-store — Brasschaat, Vlaams Gewest, Belgium (website)
- AM Audio Design — in-store — Beauvais, Hauts-de-France, France (website)
- Ambiance Concert — in-store — Angers, Pays de la Loire, France (website)
- Ars Antiqua Audio — in-store — Boadilla del Monte, Comunidad de Madrid, Spain (website)
- Art Sonique — France (website)
- Audio Alternative — online and in-store — Fort Collins, Colorado, United States (website)
- Audio Ark — in-store — Edmonton, Alberta, United States (website)
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