Specifications

Frequency Response1:	AD-C42T
Frequency Response1:	100- 20k Hz (-3 dB), 85- 20k Hz (-10 dB)
Maximum Output2:	101 dB SPL continuous rms output
(calculated)	107 dB SPL peak output
Transducers:	LF: 105 mm (4”), 19 mm (0.75”) voice coil;
	weatherproof, low-distortion polypropylene cone.
	HF: 19mm (0.75”) titanium dome, neodymium magnet.
Nominal Coverage:	100° conical (average 2.5 kHz - 10 kHz)
Impedance (ohms):	8.0 nom./ 6.7 min. @ 300 Hz.
Power Rating3:
rms (IEC 100 hrs):	40 watts rms (30 watts, AD-C42T)
recommended amp power:	80 watts rms, maximum
Sensitivity:	85.0 dB, 1 watt, 1 meter, flush mounted (2 pi)
Bass Loading:	sealed
Optional Processing:	100 to 125 Hz. high pass >12 dB/octave
Dimensions:	see drawings
Net Weight:	AD-C42T: 2.7 kg (6.0 lb.)
Enclosure:	Corrosion-resistant power coated steel enclosure with injection-molded plastic baffle. Press on metal
	grille
Mounting System:	Captive, integral mounting clamps. Insert enclosure into cutout, and tighten. Suspended ceiling C-ring
	and support bars included.
Connectors:	Ceramic block connector inputs and terminal block “through” connectors (rated for 400W max).
Controls:	Transformer “tap” selector/ bypass (8 ohm) switch, settings: 3.8, 7.5, 15, and 30 watts (7.5, 15, 30 watts
	for 100V) and 8 ohms. Averaged over 50Hz - 20kHz bandwidth (30W tap).
	Transformer Distortion: less than .01% THD above 100Hz, 0.2% @ 50Hz (30W tap). Bandwidth: 40 - 20k
	Hz (-1dB, all taps).

Agency Listings: CE, UL 1480 (commercial/professional use, outdoor damp), UL 2043 (air handling spaces).

1- All frequency ranges specified refer to measured half-space response (2 pi).

2- Calculated maximum peak SPL at 1 m, half-space, speaker operating at rated rms power pink noise input, 50 Hz to 20 kHz.

3- Maximum input power tested in accordance with IEC recommendations; 50 Hz to 20 kHz band limiting, 6 dB signal crest factor.

For detailed information, visit QSC’s web site at http://www.qscaudio.com or call us at 1-800-854-4079 (toll-free USA only)