Atoll Electronique IN80 Signature silver

Atoll IN80 Signature Hi-Fi Stereo Amplifier

The Atoll IN80 Signature is an integrated stereo amplifier designed and manufactured in France. It uses top-tier components to achieve a high level of sound performance. This meticulous approach is reflected in the design of ATOLL proprietary circuits, aimed at preserving the integrity of the most subtle musical signals.

Design and Build Quality

The IN80 Signature features a sleek and minimalist design, with a 4 mm brushed aluminum front panel available in black or silver finish. The top of the amplifier is perforated to ensure optimal heat dissipation. The chassis is constructed from 1.5 mm thick metal, providing a robust and solid base for the internal components.

The front panel layout is clear and intuitive, with a motorized ALPS volume potentiometer located in the center. To the right of the volume control are two buttons for input selection, while to the left, seven LEDs indicate the currently selected input. A 6.35 mm headphone jack is conveniently positioned on the front panel for easy access.

Technical Specifications

Amplification and Power

The IN80 Signature is equipped with class AB amplification, offering an output power of 80 W per channel into 8 Ω and 120 W per channel into 4 ohms. The amplifier can deliver a peak power of 150 W, ensuring powerful and dynamic sound reproduction. The use of a 340 VA toroidal transformer and oversized capacitors with a total capacity of 31,474 µF provides a solid power supply, allowing the amplifier to maintain its performance even at high volumes and in the bass frequency range.

Audio Performance

The amplifier has a wide bandwidth of 5 Hz to 100 kHz, ensuring an extended frequency response. The signal-to-noise ratio of 100 dB and a rise time of 2.5 µs contribute to the amplifier’s ability to reproduce every sound detail with optimal clarity and minimal distortion. The balanced MOS-FET amplifier circuits contribute to dynamic and natural sound reproduction.

Sound Quality

The Atoll IN80 Signature has been praised for its exceptional sound quality, especially considering its price. The amplifier offers a fast, dynamic, and engaging performance, with tight and agile bass, an open and detailed midrange, and crisp and well-controlled highs.

The IN80 Signature excels in reproducing the nuances and subtleties of recordings, offering an impressive sense of detail and precision across all musical genres. Instruments are rendered with accuracy and realism, while vocals are clear and natural.

The amplifier’s well-sized power supply provides ample headroom and ease of drive, even with speakers presenting a more challenging load. The dynamic range is wide and lively, with the IN80 Signature capturing the energy and excitement of the original performance.

Overall, the Atoll IN80 Signature offers a balanced, natural, and highly musical presentation, making it an excellent choice for audiophiles seeking a high-performance integrated amplifier at a reasonable price.

Upgrade Options

Atoll offers several upgrade options for the IN80 Signature, allowing users to customize the amplifier according to their specific needs:

• Phono card (P50 for MM or P100 for MM/MC) on the AUX input
• Digital card (DA100 or DA200) with coaxial, optical, USB, and Bluetooth inputs
• Atoll universal remote control

These optional cards can be combined, offering even more flexibility and features.

Advantages of the Atoll IN80 Signature

• High-quality components and proprietary Atoll circuits for optimal signal integrity
• Comprehensive connectivity options, including 5 RCA inputs, BY-PASS input, and preamp outputs
• Optional phono and digital cards for flexibility
• Sleek and minimalist design with a brushed aluminum front panel
• 1.5 mm thick metal chassis and perforated top for heat dissipation
• Impressive specifications, 2×80 W RMS under 8 Ω, 100 dBA signal-to-noise ratio, and low distortion
• Designed and manufactured in France, ensuring high standards of craftsmanship and quality control
• Excellent value for money, offering top-notch performance at a competitive price

Technical Specifications

Architecture

• Single push-pull MOSFET transistor power stage
• Output stages biased in class A/B
• Double-sided printed circuit boards with nickel/gold finish
• MKP technology coupling capacitors
• High-performance heat sinks, direct thermal coupling
• Thermal protection
• Control loop
• ALPS motorized potentiometer

Performance

• Power: 2 × 80 W RMS at 8 Ω
• Input impedance: 357 kΩ
• Sensitivity: 100 mV
• Rise time: 2.5 µs
• Signal-to-noise ratio: 100 dBA
• Bandwidth: 5 Hz – 100 kHz

Power Supply

• 340 VA toroidal transformer
• Filtering capacitors: 4 × 6800 µF

Construction

• 4 mm brushed aluminum front panel
• 1.5 mm sheet metal chassis, aluminum buttons
• Discrete component audio stages
  • Coupling capacitors
  • High-performance heat sinks

Connectivity

• 5 stereo audio inputs (RCA)
  • Auxiliary (or optional P50 or P100 phono card)
  • CD player
  • Tuner
  • Tape recorder (input/output with control loop)
  • DVD player
• 1 bypass input
• 2 preamplifier outputs
• 1 headphone output 6.35 mm
• 1 12 V trigger output

Dimensions and Weight

• Dimensions: 440 × 90 × 300 mm (W × H × D)
• Weight: 8 kg

Available Options

• Full-range compatible remote control
• Phono cards for auxiliary input
  • P100 (configurable for moving magnet or moving coil)
  • P50 (moving magnet)
• Digital cards
  • Signature card (identical to IN200SIG)
  • Bluetooth receiver with direct digital link
  • Inputs: 2 coaxial, 2 optical (24-bit / 192 kHz), 1 USB-B
  • AKM AK4490 converter
  • Compatibility: PCM 16-32 bits up to 384 kHz, DSD64, DSD128
  • XMOS USB interface with ATOLL firmware