ATI Amplifier Technologies AT541NC

ATI AT541NC 1-Channel Power Amplifier

Unleash the Power

The ATI AT541NC is a 1-channel power amplifier that delivers an impressive 500W per channel, making it a true heavyweight in the realm of audio amplification. This output power is achieved by bridging each pair of amplifier output modules, which increases the output power by 2.5 times for greater headroom, better speaker driving capability, and increased sonic impact. This makes the AT541NC capable of driving even the most demanding speakers with ease and precision.

Cutting-Edge Technology

The AT541NC is designed and built on the foundation of the highly efficient Hypex N-Core amplifier technology. This technology is renowned for its musicality and efficiency, making it a popular choice among audiophiles and professionals alike. The amplifier uses two N-Core modules per channel in a differential bridged output configuration, delivering 500W RMS per channel. This ensures that the amplifier can deliver high-quality sound even at high volumes.

Intelligent Design

The AT541NC is one of the first ATI amplifiers to use microprocessor control for turn-on delay and automatic AC power recognition and configuration. This means that the amplifier can automatically recognize whether it is connected to a nominal 117V or 230V power supply and configure itself accordingly. This intelligent feature ensures optimal performance and protects the amplifier from potential power-related issues.

Superior Build Quality

The AT541NC is built with high-current toroidal transformers, a standard for all ATI power amplifiers, which provide clean power and performance stability. The amplifier is also equipped with an effective protection system against overloads, DC faults, and thermal conditions, ensuring its longevity and reliability.

User-Friendly Features

The AT541NC is designed with user convenience in mind. It features 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. The amplifier also includes an unbalanced RCA input, a balanced XLR input, and an input selection switch.

Magical Listening Experience

Let’s get to the heart of the matter: the sound. The ATI AT541NC excels in balance and clarity. Instruments express themselves with exceptional precision, each note vibrating with stunning clarity. The bass is powerful, the midrange open, and the treble crystalline. A perfect balance, regardless of volume. Voices, whether male or female, were reproduced with impressive fidelity. Even with complex recordings, clarity and balance were preserved.

Comparisons and Choices

When comparing the ATI AT541NC 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.

Advantages in Brief

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

Technical Specifications

Architecture

• Number of channels: 1
• Hypex N-Core NC-500 Class D amplifier modules
• Toroidal transformers:
  • 40% more efficient than EI type
  • Each transformer includes two bifilar windings
• Soft-start circuit:
  • Power-on board controlled by microprocessor
  • Initial input voltage check
  • Transformer configuration for operation at 120 V or 230 V
  • Progressive power-on timers to reduce inrush current
  • Ability to power on multiple units simultaneously without tripping circuit breakers

Audio Performance

• Rated output power: 500 W RMS at 8 Ω
• Input sensitivity for maximum rated output power - 8 Ω: 2.35 V
• 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 (rated power, A-weighted)
• Total harmonic distortion + noise: < 0.02% (from 20 Hz to 20 kHz)
• Intermodulation distortion: < 0.03%
• Recommended load impedance: 4 Ω to 16 Ω
• Power bandwidth: +0, -3 dB from 20 Hz to 40 kHz
• Damping factor: > 400
• Crosstalk: > 90 dB
• Voltage gain: 28.5 dB ± 0.2 dB (RCA and XLR inputs)
• Slew rate: > 60 V/μs
• Input impedance: 20 kΩ
• Output DC offset: < ± 25 mV

Connectivity

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

Physical Characteristics

• Power supply: 90-132 V AC or 200-260 V AC
• Power consumption: standby ≤ 0.5 W (240 V AC), idle 30 W, standby 20 W
• Dimensions (W × H × D): 216 × 153 × 270 mm
• Net weight: 15 kg
• Weight with packaging: 20 kg
• Detachable power cord provided: European plug (Type F)