HEDD Type 40 XTD Extension Modules

The HEDD Type 40 XTD Extension Modules take the remarkable performance of the HEDD Type 40 Main Studio Monitors to the next level, delivering greater low-frequency authority, increased output, and exceptional control over how bass interacts with your listening environment.

Designed specifically for HEDD's flagship modular Type 40 monitoring system, each active extension module combines a powerful 10¾-inch high-excursion woofer with 700 watts of dedicated Class D amplification and advanced DSP processing. Whether you're expanding a precision mixing room, building a large-format mastering studio, or outfitting an immersive audio environment, the Type 40 XTD provides the additional headroom and flexibility needed for truly demanding monitoring applications. With selectable Closed or Ported operation, innovative cardioid bass control, and seamless integration with the Type 40 Main, these modules deliver serious low-frequency performance without sacrificing the clarity and accuracy that professional engineers depend on. The HEDD Type 40 XTD is much more than a traditional subwoofer. It is a purpose-built active extension module engineered to work directly with the Type 40 Main, expanding the system's low-frequency capabilities while maintaining its carefully controlled sonic character. Each module features a high-performance woofer driven by a dedicated ICEpower Class D amplifier, delivering powerful, articulate bass reproduction with exceptional dynamic control. HEDD's innovative Closed or Ported technology allows users to tailor the module's acoustic behavior to their room and workflow. Closed mode prioritizes tight, well-defined bass response, outstanding transient accuracy, and low-frequency detail, making it an excellent choice for critical mixing and mastering. Ported mode increases efficiency and maximum output, providing greater impact and headroom for larger rooms, longer listening distances, and high-output monitoring applications. The modular system can accommodate up to three XTD modules per Type 40 Main monitor, allowing engineers to build a monitoring system that grows alongside their studio. One of the most impressive capabilities of the Type 40 XTD is its configurable cardioid bass operation. Unlike conventional low-frequency systems that radiate energy in multiple directions, the Type 40 System can use XTD modules to reduce rearward bass radiation, helping minimize unwanted room interactions and improve low-frequency consistency at the listening position. This is particularly valuable in smaller control rooms, home studios, and acoustically challenging environments where controlling bass buildup can be difficult. The XTD supports four operating configurations: Frontfire Ported, Frontfire Closed, Cardioid Ported, and Cardioid Closed, giving engineers exceptional flexibility when optimizing their monitoring system. Integrated DSP and HEDD Lineariser technology provide precise time alignment between the Type 40 Main and extension modules, preserving transient definition and cohesive system performance. HEDD CTRL software further simplifies system management with remote adjustments, configuration tools, and recallable presets. With balanced analog and AES/EBU digital connectivity, vertical modular expansion, and premium construction assembled in Berlin, the Type 40 XTD transforms the Type 40 Main into a highly adaptable, large-scale reference monitoring system capable of delivering uncompromising performance in rooms ranging from intimate mix spaces to major professional control rooms.

HEDD Type 40 XTD Extension Modules Feature

• Dedicated active extension modules designed exclusively for expanding the HEDD Type 40 Main Studio Monitoring System
• Matched left and right extension modules provide balanced expansion for stereo monitoring systems
• High-excursion low-frequency drivers deliver powerful, articulate bass reproduction with excellent dynamic control
• Dedicated ICEpower Class D amplification provides substantial low-frequency headroom and efficient performance
• Advanced DSP processing ensures seamless integration with the Type 40 Main monitoring system
• Innovative Closed or Ported technology allows engineers to customize low-frequency performance for different rooms and applications
• Closed mode prioritizes bass precision, transient accuracy, and low-frequency definition for critical listening
• Ported mode delivers increased low-frequency efficiency, greater output, and additional dynamic headroom
• Configurable cardioid operation reduces rearward bass radiation to help minimize unwanted room interactions
• Four selectable operating modes provide exceptional flexibility for studio installations and acoustic environments
• Cardioid Closed operation offers extended directional bass control for improved performance in challenging listening spaces
• HEDD Lineariser technology enables precise time alignment with the Type 40 Main for coherent transient response
• Scalable modular architecture allows the addition of multiple extension modules per channel as monitoring requirements grow
• Frontfire Ported configurations provide progressively greater low-frequency output as additional modules are installed
• Integrated HEDD CTRL compatibility provides convenient remote system management and configuration
• Recallable system presets make it easy to optimize monitoring performance for different workflows and listening positions
• Balanced analog and AES/EBU digital connectivity enables flexible integration with professional audio systems
• Signal-through connections simplify routing between monitoring components
• Vertical modular expansion increases system capability while maintaining a relatively compact studio footprint
• Side mounting provisions support flexible installation in professional control rooms
• Premium cabinet construction and high-quality components deliver long-term reliability
• Designed and assembled in Berlin, Germany, with individual testing before shipping

HEDD Type 40 XTD Extension Modules Specifications

• Product Type: Active Extension Module for TYPE 40 Main
• Configuration: Matched Left/Right Pair
• Low-Frequency Driver: 10¾-inch Ultra-High Performance Subwoofer per module
• Amplifier Type: ICEpower Class D
• Amplifier Power: 700 W per module
• Total Amplifier Power: 1400 W per matched pair
• Frequency Response: 20–80 Hz (extends to 20–250 Hz in Cardioid with the TYPE 40 Main) at -3 dB
• Operating Modes: Frontfire Ported, Frontfire Closed, Cardioid Ported, Cardioid Closed
• Cabinet Operation: Closed or Ported
• Analog Input: Balanced analog XLR (greater than 20 kΩ)
• Digital Input: AES/EBU XLR
• Supported Digital Sample Rates: 44.1–192 kHz
• Analog Output: XLR Through
• Digital Output: AES/EBU XLR Through

HEDD Type 40 XTD Extension Modules Include

• HEDD Type 40 XTD Extension Modules (Matched Pair)
• Power Cables
• Manual & Documentation
• Manufacturer Warranty