AD-C42T In-Ceiling Speaker (Pair) - Batts Audio, Video and Lighting

AD-C42T In-Ceiling Speaker (Pair)

QSC Audio, Inc.

The AcousticDesign Series of installation loudspeaker products from QSC Audio expands with the new AD-C42T ceiling mount loudspeaker system. Designed for background and general purpose audio playback, the new AD-C42T is compact and acoustically matched to the entire AD Series. Rated for 40 watts continuous power handling and able to take up to 160 watt peaks, the compact AD-C42T is suitable for a wide variety of ceiling installations 

The 4" woofer is equipped with a polypropylene cone for protection in humid environments. The driver features a synthetic rubber surround and in its sealed enclosure is optimized to deliver useable low-frequency extension below 70 Hz. The high frequency device is a co-axial, post mounted 0.75" dome tweeter with a titanium diaphragm and a cloth surround. The coaxial post is mounted slightly off center in relation to the low-frequency driver in order to lessen the destructive interference often found with axisymmetric post mounted coaxial systems. The conical dispersion of the AD-C42T is 100° and sensitivity measures 88 dB SPL. 

The baffle and mounting tabs are molded from high-impact polystyrene. The rear enclosure is a heavy gauge, powder coated steel. The attractive aluminum grille is backed with an acoustically transparent white cloth. On the rear of the enclosure is an input cup that features a conduit attachment point plus an additional knockout for daisy-chain wiring. Input signal connection is made with a high temperature resistant ceramic screw terminal for compliance with European safety standards. 

The AD-C42T is factory shipped with C-rings and tile rails for installation. New construction rings (AD-NC4) and mud rings (AD-MR4) are also available separately. The AD-C42T is equipped with a 70/100 V transformer with multiple taps and an 8 ohm bypass.

  • 4" polypropylene cone woofer
  • 0.75" titanium dome tweeter
  • 40 watt continuous power handling, 160 watt peak
  • 70/100 V multitap transformer with 8 ohm bypass
  • C-ring and tile rails included
Package Includes:
    - 2 qty. AD-C42T loudspeakers
    - 2 qty. C-ring and tile rails
    - 2 qty. Round grilles (white, paintable) 

    - 2 qty. Paint masks
    - 2 qty Connector assemblies

    Configuration Compact 2-way, sealed enclosure

    4" (10 cm) weather resistant, polypropylene cone woofer
    0.75" titanium dome tweeter
    Frequency Range 1
      Frequency Response (-6 dB)
      Useable Frequency Range (-10 dB)

    72 Hz - 20 kHz
    60 Hz - 20 kHz
    Maximum Output 2
      Calculated Peak Output
      Calculated Continuous Output

    110 dB SPL
    104 dB SPL
    Nominal Impedance 8 ohms switchable
    Power Rating
      RMS Power Handling3 
      Recommended Max Amp Power

    40 W (100 hours IEC)
    80 W RMS
    Sensitivity 88 dB, 2.83 V, 1 m, free space (4pi)


    Type Custom low distortion laminated core, wide bandwidth design
    Taps 70 V: 30, 15, 7.5, 3.8 W / 100 V: 30, 15, 7.5 W / 8 ohms selected by switch
    Environmental Exceeds Mil Spec 810 for humidity, salt spray and dust;
    IEC 60529 IP-X3 splash rating
    Agency Rating Listed UL1480, UL2043 safe for use in air handling spaces;
    Transformer is Listed UL1876; Compliant BS/EN 60849 safety standards


    Material Injection molded, high impact polystyrene baffle on a steel enclosure
    Finish White (paintable)
    Grille Painted aluminum
    Connectors Ceramic block or 4-pin Euro terminals in fire protective sub-chamber
    Mounting Hardware Rails and C-ring for ceiling tile installation
    Weight 6.1 lb (2.7 kg) Net
    18 lb (8.2 kg) (pair) Shipping
    Available Accessories AD-MR4 / AD-NC4