Deliver Premium Sound with the QSC AD-C4T-BK 4.5-Inch Two-way Ceiling Speaker, 70/100 Volt Transformer with 16Ω Bypass - Black

The QSC AcousticDesign™ AD-C4T-LP is a 4.5-inch two-way low profile ceiling loudspeaker, ideal for foreground and background sound reinforcement in restaurants, retail spaces, educational facilities, worship centers, transportation terminals, and more. Designed for performance and versatility, the AD-C4T-LP offers 70/100V and 16-ohm bypass configurations with consistent tonal characteristics across the entire AcousticDesign family, ensuring seamless sonic integration in mixed ceiling, surface, and pendant installations.

Built with premium components including a weather-treated paper cone woofer and aluminum dome tweeter, the AD-C4T-LP utilizes QSC’s DMT (Directivity Matched Transition™) waveguide technology to deliver smooth, uniform frequency response across the coverage area. Its rugged construction, magnetic grille, and installer-friendly features make it an elegant and reliable solution for professional audio installations.

• Consistent tonal characteristics across the entire AcousticDesign family for ceiling, surface, and pendant installations
• DMT (Directivity Matched Transition™) waveguide ensures uniform coverage and smooth frequency response
• Snap-fit magnetic grille with blemish-free removable logo
• 3x double-stepped, long-travel dog-ear blind mount system for quick installation
• Intrinsic Correction™ voicings available via Q-SYS Platforms and CXD amplifiers
• Low-saturation, low-loss 70/100V transformer with 16-ohm bypass
• Removable conduit cover plate for pre-install wiring flexibility
• UL1480 and UL2043 certified for air handling space use
• Available in white (RAL 9010) and paintable to match any décor
• Complete EASE, CF2, CAD, and BIM data available online

SPECIFICATIONS

System Type

• 4.5-inch two-way low profile ceiling loudspeaker

Transducers

• LF Driver: 114 mm (4.5-inch) weather-treated paper cone woofer, 1-inch voice coil
• HF Driver: 19 mm (0.75-inch) aluminum dome tweeter on DMT waveguide

Frequency Response

• Effective Range: 70 Hz – 20 kHz

Power Handling

• Rated Noise Power/Voltage: 30 W / 22 V (RMS)
• Recommended Amplifier Power: 60 W

Sensitivity and Coverage

• Sensitivity: 87 dB
• Rated Coverage: 150° conical DMT
• Maximum Continuous SPL: 102 dB
• Maximum Peak SPL: 108 dB

Impedance and Taps

• Nominal Impedance: 16 ohms (bypass)
• Transformer Taps:
  • 3.75 W (70V) / 7.5 W (100V)
  • 7.5 W (70V) / 15 W (100V)
  • 15 W (70V) / 30 W (100V)
  • 30 W (70V)

Enclosure and Materials

• ABS baffle with powder-coated steel back can
• Powder-coated steel grille with magnetic attachment
• UV inhibitors for color retention

Connections

• Euroblock connector with parallel output
• Removable conduit cover plate

Mounting

• 3x double-stepped, long-travel dog-ear blind mount system (0"–2.25" ceiling thickness)
• Cutout Dimension: Ø 245 mm (9.65 inches)

Dimensions and Weight

• Product Dimensions (Diameter × Height): Ø 280 × 100 mm (11.02 × 3.93 inches)
• Net Weight: 3 kg (6.6 lbs)
• Shipping Weight (Pair): 10.2 kg (22.5 lbs)

Included Accessories

• C-ring and tile rails, rail screws, Euroblock connector, cut-out template, tether grille

Optional Accessories

• AD-MR6 pre-install mud ring

Certifications

• UL1480, UL2043, NFPA90, NFPA70
• IP-34 rated for indoor use
• Transformer UL registered per UL1876, ROHS and CE compliant
• Baffle meets UL94-V0 and UL945VB flammability ratings

Manufacturer: QSC Audio
Model: AD-C4T-BK
SKU: I439818-N-4-WHXX
UPC: 684284067524

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