Da-Lite 21798LS Tensioned Advantage Electrol HDTV Format Projection Screen (65x116",HDP 1.1

Product Overview

The Da-Lite 21798LS Tensioned Advantage Electrol is a ceiling-recessed motorized projection screen with a 65" x 116" (133" diagonal) viewing area in 16:9 HDTV format and an HD Progressive 1.1 surface. The HD Progressive 1.1 is a standard-gain matte white surface that delivers a wide 180-degree viewing angle and is compatible with any projector type, making it one of the most versatile surfaces in the Da-Lite commercial line. The TruGuide tensioning system maintains a flat surface for 4K and UHD projection. This model ships with a low-voltage switch included.

Product Description

The Da-Lite 21798LS Tensioned Advantage Electrol provides a 133" diagonal ceiling-recessed electric projection screen for standard commercial AV conference room and boardroom installations. The 65" x 116" image area at 16:9 HDTV format matches all standard HD and UHD projector outputs. The HD Progressive 1.1 surface is a gain 1.1 matte white with a wide viewing angle that supports room arrangements where seating extends well off-center from the screen axis. This is the appropriate surface choice when ambient light is controlled and maximum viewer coverage is the priority. The TruGuide tensioning system applies lateral tension to the full width of the screen material, eliminating surface deformation that would otherwise cause visible focus inconsistencies across a 4K or UHD image. The ceiling-recessed steel case includes a closure door that seals the ceiling opening when the screen is not in use. The LS suffix indicates a low-voltage switch is included with the unit. The motor accepts dry contact triggers for integration with AMX, Crestron, Extron, and other commercial AV control systems.

Key Features

• HD Progressive 1.1 Surface — Gain 1.1 matte white with wide viewing angle; compatible with all projector types.
• TruGuide Tensioning System — Maintains a flat surface across the full 65" x 116" area for 4K/UHD focus consistency.
• 133" Diagonal / 16:9 HDTV Format — Standard aspect ratio matching all HD and UHD projector outputs.
• Ceiling-Recessed Steel Housing — Flush-mount with closure door for clean installation appearance.
• Low-Voltage Switch Included (LS) — Ready for control system integration; switch included in the package.
• IR and RF Remote Included — Standalone operation capability without a control system.

Typical Applications

• Conference rooms with controlled ambient lighting
• Boardrooms and training rooms requiring wide viewing angle coverage
• Commercial meeting spaces with ceiling AV integration
• Government and corporate facilities
• Multi-purpose rooms and all-hands spaces

Technical Specifications

Frequently Asked Questions

Q: When should I choose HD Progressive 1.1 over the 1.1 Contrast surface?

A: If the room has good lighting control (dimming or blackout capability), the standard HD Progressive 1.1 is sufficient and provides the widest viewing angle. The 1.1 Contrast surface is better when ambient light is moderate and cannot be fully controlled.

Q: What does the LS designation mean?

A: LS indicates that a low-voltage switch control system is included with the screen. This simplifies installation in spaces where a separate switch accessory would otherwise need to be purchased.

Q: Is this screen compatible with 4K UHD projectors?

A: Yes. The HD Progressive 1.1 surface accepts any resolution input. The TruGuide tensioning system maintains sufficient flatness for sharp 4K focus across the full image area.

Q: How is this screen controlled in a Crestron-based AV system?

A: The low-voltage motor accepts a dry contact (momentary closure) trigger, which is the standard control interface for Crestron, AMX, Extron, and other commercial AV control processors.

Q: What warranty does this product carry?

A: Da-Lite products carry a limited warranty. Contact Creation Networks for specific warranty terms applicable to the 21798LS.