AD ULT4.13 Professional Class D Power Amplifier

AD ULT4.13 Professional 4-Channel Class D Power Amplifier

The AD ULT4.13 is a premium 4-channel Class D professional power amplifier engineered for touring systems, concert venues, churches, rental companies, clubs, and permanent installations. Designed to deliver exceptional performance with maximum efficiency, the ULT4.13 combines high output power, outstanding reliability, and crystal-clear sound in a compact 1U rack-mount chassis.

Delivering 4 × 1,300W RMS at 8Ω, 4 × 2,150W RMS at 4Ω, and 4 × 3,200W RMS at 2Ω, the AD ULT4.13 provides ample power for professional full-range speakers, stage monitors, subwoofers, and line array systems. In Bridge Mode, it delivers up to 2 × 6,000W RMS at 4Ω, making it an excellent choice for high-output subwoofer applications.

The ULT Main Series features an elegant and sophisticated design with a premium titanium-colored front panel and a distinctive side-panel styling that gives the amplifier a modern, professional appearance. Its slim 1U design maximizes rack space while maintaining excellent cooling performance.

Built using premium-quality components, the ULT4.13 is engineered for long-term reliability. It utilizes high-performance output transistors capable of stable 2Ω operation for extended periods, securely mounted with metal brackets for improved durability and easier servicing. A larger, heavy-duty transformer ensures stable power delivery, while USA-imported inductors and genuine NICHICON capacitors provide superior electrical performance and long service life. Professional-grade genuine NEUTRIK XLR and Speakon connectors ensure dependable signal and speaker connections in demanding environments.

An advanced high-power jet fan cooling system efficiently dissipates heat during continuous operation, while the amplifier's unique PCB-to-PCB internal board connection eliminates ribbon cables, resulting in a stronger, more reliable, and more durable internal design.

For added reliability, each amplifier channel features its own independent fuse protection, ensuring that each channel operates safely and independently. Combined with comprehensive protection against short circuits, DC faults, overload, overheating, RF interference, ultrasonic signals, and voltage spikes, the AD ULT4.13 delivers dependable performance for the most demanding professional audio applications.

With its 10Hz–20kHz frequency response, high damping factor, low distortion, balanced XLR inputs, and professional Neutrik NL4 speaker outputs, the AD ULT4.13 is built to provide clean, powerful, and accurate sound for every performance.

Key Features

• Professional 4-Channel Class D Power Amplifier
• Premium Titanium Front Panel with Modern 1U Rack Design
• 4 × 1,300W RMS @ 8Ω
• 4 × 2,150W RMS @ 4Ω
• 4 × 3,200W RMS @ 2Ω
• Bridge Mode: 2 × 6,000W RMS @ 4Ω
• Stable 2Ω Operation for Continuous Professional Use
• Heavy-Duty High-Efficiency Transformer
• USA-Imported Inductors
• Genuine NICHICON Capacitors
• Genuine NEUTRIK XLR & Speakon Connectors
• Advanced High-Power Jet Fan Cooling System
• PCB-to-PCB Internal Connection for Improved Reliability
• Independent Fuse Protection for Each Power Channel
• Frequency Response: 10Hz–20kHz (±0.35dB)
• High Damping Factor for Tight Bass Control
• Comprehensive Protection Circuitry
• Ideal for Concerts, Churches, Touring Systems, Rental Companies, Line Arrays, and Fixed Installations.