HEDD
TYPE 40 XTD

The TYPE 40 XTD is a dedicated, active, low-frequency extension module designed for the TYPE 40 Main. Depending on its configuration, it either increases low-frequency headroom and output or provides cardioid control over rearward bass radiation. It can also do both. While the Main remains a complete full-range reference, the XTD gives engineers greater control over how the system performs in their room. The XTD is designed for use with the TYPE 40 Main and is not a standalone product.

Studios can tailor the configuration to their acoustic and playback requirements with one to three XTD modules per channel, then expand the system as those needs change.

Each XTD module combines a 10¾-inch high-excursion woofer with a dedicated 700-watt Class D amplifier. There are four different operating modes that combine frontfire or cardioid operation with a ported or closed enclosure. All of these modes are integrated with the main through HEDD Lineariser® and HEDD CTRL.

In cardioid mode, the XTD works with the main or frontfire XTD modules to reduce the amount of low-frequency energy behind the system by up to 10 decibels. This helps limit wall reflections behind the monitors that can distort the low end. A Cardioid Closed XTD and a full-range Main provide directional control from approximately 20 to 200 Hz. Cardioid Closed offers the widest frequency range of rear reduction. Cardioid Ported, when used with Frontfire Ported modules in mixed configurations, provides somewhat less rear reduction while retaining the efficiency of a ported system. Larger mixed configurations combine Frontfire output with Cardioid control; performance is determined by the arrangement and operating modes. For cardioid operation, the XTD is physically reversed to fire toward the rear.

Select one to three XTD modules per channel based on the room's acoustic behavior, listening distance, and output requirements. Each XTD module can be configured with either a ported or closed enclosure.

For maximum output, all XTD modules can operate in frontfire ported mode, which increases the maximum SPL at 50 Hz by 6, 12, or 15 dB with one, two, or three modules, respectively, compared to the main module alone. Mixed frontfire/cardioid configurations balance output needs with rear radiation control. The main monitor remains in place in every configuration, allowing the system to expand as needs change.

HEDD CTRL allows you to manage the main and XTD modules from the listening position. After assigning the units and selecting their operating modes to match the physical setup, the software automatically applies the correct LF Range and Extension Quantity settings. Engineers can then manually adjust the room with a 12-band parametric equalizer at the group and individual speaker levels. There are presets for different workflows or listening positions. The free software supports systems of up to 250 speakers.