Atoll Electronique IN100 Signature
The IN100 Signature brings airy resolution, authoritative bass and fast, propulsive dynamics to ambitious systems. Iiwi Reviews admired its precise layering and revealing drive, while IWII Reviews found exceptional tonal texture and space at the price. Its optional DAC broadens a muscular, finely built integrated amplifier into a compelling hub.
WATT RECOMMENDS
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Deliciously Crispy
Sound Quality
91/100
Build Quality
91/100
Features Connectivity
88/100
Value for Money
92/100
Pros
Open, highly detailed presentation with strong tonal texture, clean transients and generous air around instruments.
Weighty, controlled bass and energetic dynamics deliver convincing punch, scale and rhythmic engagement.
Wide, precisely layered soundstage keeps individual lines easy to follow during dense recordings.
Sturdy, premium-feeling construction, with dual transformers and robust terminals reinforcing its value proposition.
Cons
Bright, explicit treble can become hot or sibilant with already lively speakers and analytical sources; careful pairing is important.
Digital connectivity requires the optional DAC module, adding to the base price.
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What Reviewers Are Saying
SOUND QUALITY PERFORMANCE 91/100
Reviewers find the IN100 Signature unusually open, detailed and energetic, with strong bass weight preventing its bright-leaning presentation from sounding thin. It is especially convincing with carefully chosen partnering equipment, although those seeking a relaxed or forgiving sound should note the occasionally hot treble balance.
Transparency Resolution
94/100
Both reviews praise the amplifier's revealing, airy and clean presentation. Reviewers highlight plentiful low-level information, sharply outlined transients, inner tonal texture and unusually convincing air retrieval for the price.
Tonal Balance Musicality
88/100
The sound is described as bold, crisp and engaging, with substantial, deep bass lending body to the presentation. Treble is clear and extended, but the amplifier leans bright and can become too hot with unsuitable speakers or sources rather than offering a smooth, laid-back balance.
Dynamics
92/100
Reviewers report strong large-scale swings alongside quick, nimble transient behavior. Its kick, punch and energy keep music lively, and neither reviewer found it flat or short on drive.
Soundstage Imaging
90/100
The IN100 Signature is said to produce a wide stage with modest but useful depth, a dark background and well-separated tones. Reviewers also note precise positioning, layering and ample breathing room around instruments, even in busy recordings.
Assessments of Build Quality, Usability, and Overall Propositions.
Build Quality
91/100
Reviewers describe a sturdy, reassuringly heavy chassis with a thick aluminum front panel and casing that feels notably more luxurious than expected. Internal dual-mono-style separation, separate transformers and robust speaker terminals further support the impression of purposeful construction.
Features Connectivity
88/100
The amplifier provides five inputs plus home-theater bypass and preamp outputs, while the reviewed optional digital module adds USB, coaxial and optical inputs. Tape and pre-outs add system flexibility, though buyers should account for the additional cost of the digital section rather than assuming it is included as standard.
Value for Money
92/100
At roughly $1,250 to $2,500 depending on configuration, reviewers consider the IN100 Signature highly competitive rather than inexpensive. One calls its price-to-performance ratio great, while another finds the digital-equipped version a particularly strong buy because comparable or better sound would cost more.
Reviews & Sources
Professional reviews and sources for this product's Watt'n Potatoes analysis.
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Specifications
- Output power Wrms/8Ω
- 2×100 W
- Output power Wrms/4Ω
- 2×140 W
- Power supply
- 2×340 VA
- Total of capacitors
- 31 474 µF
- Number of inputs
- 5+1 BY-PASS
- Preamp outputs
- 2
- Bandwidth
- 5 Hz – 100 kHz
- Rising time
- 2,5 µs
- Input impedance
- 357 kΩ
- Sensitivity
- 100 mV
- Signal/Noise ratio
- 100 dBA
- Distortion at 1 kHz
- 0,05% / 10 W
- Dimensions
- 440×305×95 mm
- Weight
- 11 Kg
Manufacturer's Description — Atoll Electronique
The integrated amp-preamp IN100 Signature is manufactured with the utmost care. We choose the best possible components to achieve the highest level of sound performance. This rigorous search for perfection involves designing proprietary ATOLL circuits to preserve the integrity of the most subtle musical signals.
- 4 mm brushed aluminium front panel.
- 2×100 W / 8Ω.
- 2 toroidal transformers of 340 VA each.
- ALPS motorized potentiometer.
- Filter capacitors: 4×6800 μF.
- Single push-pull MOS-FET power stage.
- Monitoring loop.
- Discrete component audio stages.
- MKP Technology Link Capacitors.
- High-performance heat sinks, direct thermal coupling.
- Double-sided circuit boards with nickel/gold finish.
- Polarization of output stages in class A/B.
- Thermal protection.
- Optional ATOLL global remote control.
- The IN100 Signature can receive the following optional boards:
– DAC boards: DA100 and DA200.
– PHONO boards: P50 and P100 (can be combined with DAC boards).
CONNECTIVITY
Inputs
5 Audio inputs (RCA): AUX (or optional P50 / P100 phono stage), CD, TUNER, DVD, TAPE (IN + OUT).
1 BY-PASS input (used as a power amplifier).
Outputs
2 Line preamp outputs (for bi-amplification or to connect a subwoofer).
1 Trigger output (12V).
1 Ø 6,35 mm headphone jack output.
Divers
Possibility of adding DA100 or DA200 digital boards (optional).
Our balanced MOS-FET amplifier circuits offer excellent harmonic gradients and have no memory effect. Every moment, the current is immediately delivered to your speakers. This is one of the secrets of the musicality that ATOLL amplifiers enjoy.
Verified Dealers
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Authorized dealers for Atoll Electronique IN100 Signature
- A Tube High Fidelity — online and 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 — online and 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 — online and in-store — Edmonton, Alberta, United States (website)
and 85 more verified dealers