Designed and built on the musical and highly efficient Hypex N-Core® amplifier technology, the AT54XNC Series amplifiers deliver a substantial 500 watts per channel. By bridging each pair of amplifier output modules, output power is increased by 2.5x for greater headroom, loudspeaker drive and sonic impact. Available in 4 models from 1 to 4 channels, the AT54XNC Series offers efficient amplifier performance and value. High current toroidal transformers, a standard for all ATI power amplifiers, provide clean power and performance stability.

3-Wire Power Cord
7-Year Warranty
Parts and labor against defects in parts or workmanship.

3RU 5.25” (133mm) Rack Mount
6.0” (153mm) Standard Height

Shipping Weight
32 to 79 lbs (model dependent)

The AT54XNC Series amplifiers have been engineered for high power, compact and efficient amplifier choices for multi-channel listening systems. AT54XNC have been designed with balanced bridged output modules and paired with ATI-designed custom gain stages and a linear power supply. Each pair of balanced bridged Hypex N-Core® amplifier modules produce up to 500 watts with 4 ohm loudspeakers which are recognized by the amplifier as 2 ohm loads.

ATI’s proprietary voltage-sensing power supply automatically selects the correct voltage, therefore allowing the AT54XNC Series to perform properly from 100VAC to 260VAC. The amplifiers are protected from overload, DC faults and thermal conditions.

There is also a 1/8” mono mini jack for +12V trigger, a gold-plated chassis ground lug, a fuse holder and an IEC 20 Amp inlet for the provided detachable power cord. The supplied power cord will have either: a NEMA 5-15 plug (Type B) for use in the USA, a BS 1363 (Type G) plug for use in the UK, or a Schuko (Type F) plug for use in the EU and the rest of the world.

Remote Trigger
Activated from 3.3VDC to 24 VDC via a heavy-duty relay
Protection Circuits
Optically – coupled with full automatic reset.
Toroidal Transformers
40% more efficient than EI type. Each transformer has two bi-filar windings to assure low noise and crosstalk.
Circuit Boards
Double-sided, FR-4 glass-epoxy, computer-grade boards are assembled in-house.
Soft Start Circuitry
New micro-processor controlled turn-on board first ascertains input voltage and configures transformers for 120V or 230V operation then ultra soft turn-on timers reduce in-rush current to a minimum. Multiple units can be turned on without tripping circuit breakers eliminating the need for sequencing.
Power Supply Capacitance
Hypex N-Core NC-500 Class D amplifier modules with ATI's custom input buffer insures edge-of-the-art operation.
Power Cord
20A IEC power inlet with detachable, 3-wire cord.
7-Year Warranty
Parts and labor against defects in parts or workmanship.
Number of Channels
FTC Full Bandwidth Power Output@ 8Ω (Watts RMS)
FTC Full Bandwidth Power Output@ 4Ω (Watts RMS)
Input Sensitivity for Full Rated FTC Output Power - 8Ω
Frequency Response
Phase Response
Signal-to-Noise Ratio (Ref FTC Rated Power, A-Wtd)
Total Harmonic Distortion + Noise (20Hz - 20kHz)
Intermodulation Distortion
Recommended Load Impedance
Power Bandwidth FTC
Damping Factor
Voltage Gain (RCA Inputs)
Voltage Gain (XLR Inputs)
Slew Rate
Input Impedance
Output DC Offset
Power Requirements
Power Consumption (Standby)
Power Consumption (Idle/Sleep)
Chassis Dimensions (W x H x D) inches
Chassis Dimensions (W x H x D) millimeters
Net Weight (lbs/kg)
Shipping Weight (lbs/kg)
2.35 Volts
+0,-0.5dB 20Hz - 20kHz
+5° to -15°, 20Hz - 20kHz @ 1W
Safe for all types of loads. Rated for 4Ω to 16Ω.
+0,-3 dB 20Hz - 40kHz
28.5dB ±0.2dB
28.5dB ±0.2dB
Less Than ±25mV
Universal Auto-Select AC Voltage Ranges: 90-132 VAC or 200-260VAC - 1x 20 Amp Circuit ≤1W (120 VAC)
≤0.5W (240 VAC)
AT541NC: 30W/20W
AT542NC: 40W/20W
AT543NC: 60W/30W
AT544NC: 80W/40W
AT541NC: 8.5" x 6.0" x 15.5"
AT542NC: 17.0" x 6.0" x 10.625"
AT543NC-AT544NC: 17.0" x 6.0" x 15.5"
AT541NC: 216 x 153 x 270
AT542NC: 432 x 153 x 270
AT543NC-AT544NC: 432 x 153 x 394
AT542NC: 36/16
AT543NC: 59/27
AT544NC: 65/30
AT541NC: 43/20
AT542NC: 49/22
AT543NC: 69/31
AT544NC: 79/36
TitleDescriptionVersionSizeHitsDate addedDownload
AT500NC Manual AT500NC Owner's Manual1.48 MB500605-17-2021 DownloadPreview