ATI Amplifier Technologies AT544NC

ATI AT544NC 4-Channel Power Amplifier

Unleash the Power

The ATI AT544NC is more than just a 4-channel power amplifier; it embodies the quintessence of audio performance. Boasting an impressive 500W per channel, this amplifier redefines the standards of audio amplification. How does it reach such power heights? By bridging each pair of amplifier output modules, a strategy that amplifies the output power by 2.5 times, ensuring greater headroom, better speaker driving capability, and increased sonic impact.

Cutting-Edge Technology

Behind the scenes of the ATI AT544NC, Hypex N-Core amplifier technology is at work. This innovation is renowned for its musicality and efficiency, captivating both audiophiles and professionals alike. Each channel incorporates two N-Core modules in a differential bridged output configuration, delivering a consistent 500W RMS per channel. The result is a high-quality sound experience, even at elevated volumes.

Intelligent Design

The AT544NC marks a breakthrough with the integration of microprocessor control for turn-on delay, as well as automatic AC power recognition and configuration. This intelligent feature allows the amplifier to automatically adjust to a nominal 117V or 230V power supply, ensuring optimal performance and protection against potential power issues. Intelligence and power, the perfect combo.

Superior Build Quality

In the construction of the AT544NC, every detail matters. High-current toroidal transformers, a standard for all ATI power amplifiers, provide clean power and performance stability. The presence of an effective protection system against overloads, DC faults, and thermal conditions attests to its longevity and reliability. Solid construction for unwavering sound.

User-Friendly Features

The AT544NC doesn’t forget about user convenience. Well-thought-out details, such as a 1/8” mono mini-jack for +12V triggering, a gold-plated chassis ground connector, a fuse holder, and a 20 Amp IEC input for the supplied detachable power cord, make this amplifier a model of ergonomics. Add to that an unbalanced RCA input, a balanced XLR input, and an input selection switch, and you have a device that makes your life easier.

Magical Listening

Let’s get to the heart of the matter: the sound. The ATI AT544NC excels in balance and clarity. Instruments express themselves with exceptional precision, each note vibrating with astonishing clarity. The bass is powerful, the midrange open, and the treble crystalline. A perfect balance, regardless of volume. Voices, male or female, are reproduced with impressive fidelity. Even with complex recordings, clarity and balance are preserved, offering an unparalleled auditory experience.

Comparisons and Choices

When comparing the ATI AT544NC to other amplifiers, such as the Parasound Halo A 31, nuances emerge. The ATI offers richer lower mids, a slight tilt towards warmth, and an overall more enveloping sonic experience. The differences are subtle, but for discerning audiophiles, they make all the difference. Choosing the ATI means opting for an enriching listening experience.

Advantages at a glance

• Uses efficient Hypex N-Core amplifier technology
• Features automatic AC power recognition and configuration
• Versatile connectivity with unbalanced and balanced options
• Elegant design with an intuitive front panel
• Exceptional sound quality - balanced and detailed

Technical Specifications

Architecture

• Number of channels: 4
• Hypex N-Core NC-500 Class D amplifier modules
• Toroidal transformers:
  • 40% more efficient than EI type
  • Each transformer includes two bifilar windings

Startup Circuit

• Microprocessor-controlled power-on board
• Initial input voltage check
• Transformer configuration for operation at 120 V or 230 V
• Ultra-soft power-on timers to reduce inrush current
• Ability to power on multiple units simultaneously without tripping circuit breakers

Audio Performance

• FTC output power: 500 W RMS at 8 Ω
• Frequency response: +0, -0.5 dB from 20 Hz to 20 kHz
• Phase response: +5° to -15°, from 20 Hz to 20 kHz at 1 W
• Signal-to-noise ratio: > 120 dB (FTC rated power ref., A-weighted)
• Total harmonic distortion + noise: < 0.02% (from 20 Hz to 20 kHz)
• Intermodulation distortion: < 0.03%
• FTC power bandwidth: +0, -3 dB from 20 Hz to 40 kHz
• Damping factor: > 400
• Crosstalk: > 90 dB
• Slew rate: > 60 V / μs

Electrical Specifications

• Input sensitivity: 2.35 V (for maximum FTC rated output power - 8 Ω)
• Recommended load impedance: 4 Ω to 16 Ω
• Voltage gain:
  • RCA inputs: 28.5 dB ± 0.2 dB
  • XLR inputs: 28.5 dB ± 0.2 dB
• Input impedance: 20 kΩ
• DC output voltage: Less than ± 25 mV

Connectivity

• 1 unbalanced input (RCA)
• 1 balanced input (XLR)
• 1 12 V trigger input

Physical Specifications

• Power supply: 90-132 V AC or 200-260 V AC
• Power consumption:
  • Standby: ≤ 0.5 W (240 V AC)
  • Idle / standby: 80 W / 40 W
• Dimensions (W × H × D): 432 × 153 × 394 mm
• Net weight: 30 kg
• Weight with packaging: 36 kg