QSC AD-C6T-HP – AcousticDesign 6.5-Inch High-Power Blind-Mount Ceiling Speaker with 70/100V Transformer (Pair)

Product Overview

The QSC AD-C6T-HP is a 2-way 6.5-inch high-power ceiling loudspeaker with an integrated 70V/100V transformer, sold as a matched pair in white. It delivers up to 109 dB continuous and 115 dB peak SPL at 1 meter, with transformer power taps to 60W and a 120W 16Ω bypass rating for high-SPL distributed audio applications. The three-point double-stepped long-travel dog-ear blind mount system allows installation without ceiling access from above, using C-ring and rails hardware.

Product Description

Sold as a matched pair. The AD-C6T-HP targets demanding distributed audio applications where a 4.5-inch speaker lacks the headroom or low-frequency extension required. The 6.5-inch paper cone woofer uses a 1.75-inch voice coil on a ferrite magnet structure, providing the power handling needed for 60W transformer operation and 120W in 16Ω bypass mode. A 1.4-inch kapton dome compression tweeter handles high-frequency reproduction above the 2.6 kHz crossover point, extending the frequency range to 20 kHz. Frequency extension reaches 58 Hz (-10 dB), providing usable bass response for background music and moderate-SPL speech-plus-music applications. The 120° conical coverage pattern (-6 dB) with a directivity index of 5.6 dB provides focused energy delivery to the listening plane in rooms with acoustically treated or hard ceilings. The blind mount system is a practical installation feature: the three dog-ear clamps engage the ceiling from below without requiring personnel in the plenum, which simplifies retrofits in occupied buildings and reduces installation labor. Transformer tap selection — 7.5, 15, 30, and 60W at 70V; 15, 30, and 60W at 100V — allows the system designer to match per-speaker power to coverage zone requirements within a distributed audio system. The 4-pin Euroblock input with parallel output supports daisy-chain wiring. The minimum impedance of 15.4Ω at 281 Hz is within specifications for standard 70V/100V distributed amplifiers. The powder-coated steel backcan provides structural integrity and thermal management for sustained high-power operation.

Key Features

• High-Power 6.5-Inch Woofer — 1.75-inch voice coil handles up to 120W at 16Ω bypass for demanding SPL applications.
• 115 dB Peak SPL — High output headroom for large rooms and high-SPL distributed audio zones.
• Blind Mount System — Three-point double-stepped dog-ear clamps install from below without plenum access, simplifying retrofits.
• 60W Transformer Tap — Maximum 70V/100V tap supports high-SPL coverage zones in distributed audio systems.
• 120° Coverage Pattern — Controlled directivity reduces ceiling reflections and focuses energy to the listening plane.
• Kapton Dome Compression Tweeter — Extended high-frequency response to 20 kHz for music reproduction.
• Euroblock with Parallel Output — Daisy-chain wiring for multi-speaker ceiling distributions.
• Sold as Matched Pair — Both speakers matched and shipped together.

Typical Applications

• Commercial meeting space — high-SPL ceiling audio for large open areas
• Training room — intelligible speech reinforcement with music capability
• Government space — distributed audio in high-ceiling or acoustically challenging environments
• House of worship — background and foreground audio in lobbies, fellowship halls, or overflow areas
• Auditorium — supplemental ceiling fill coverage in delay zones

Technical Specifications

Frequently Asked Questions

Does the AD-C6T-HP require access to the ceiling plenum for installation?

No. The three-point double-stepped dog-ear blind mount system clamps to the ceiling from below without requiring personnel in the plenum. This significantly reduces installation labor in occupied building retrofits.

What is the maximum power input for the AD-C6T-HP?

At 16Ω bypass, the AD-C6T-HP is rated for 120W continuous. At 70V, the maximum transformer tap is 60W. At 100V, the maximum tap is also 60W.

Can the AD-C6T-HP be used with both 70V and 100V distributed audio systems?

Yes. The integrated transformer includes taps for both 70V and 100V operation. Select the appropriate tap for the amplifier output voltage in use.

Is a mud ring available for the AD-C6T-HP?

Yes. The optional AD-MR6 mud ring is available separately and is recommended for new construction installations where the speaker is installed before drywall finishing.

What is the cutout diameter required for the AD-C6T-HP?

The required ceiling cutout is Ø245 mm (Ø9.65 in).