QSC AD-S4T Acoustic Design 4.5-Inch Surface Mount Speaker

Name: QSC AD-S4T Acoustic Design 4.5-Inch Surface Mount Speaker
SKU: 4980
Availability: InStock

•30 Watts at 8Ω nominal setting, 30/15/7.5W multi-tap at 100V
•Frequency Range (-10 dB)1 68 Hz – 20 kHz
•Nominal Sensitivity: 104 dB SPL @ 1 m (3.3 ft)
•Rated Maximum SPL 110 dB @ 1 m (3.3 ft), 16W tap
•4.5-inch weather treated woofer; 0.75-inch silk dome tweeter 120° conical DMT™ coverage
•Dimension 261 × 161 × 163mm

The AD-S4T from QSC’s AcousticDesign series is a two-way surface-mounted loudspeaker. It’s ideal in foreground and background sound reinforcement situations utilizing 70/100V or 16Ω bypass configurations. The AD-S4T features a high-quality weather-treated paper cone woofer with a 1″ voice coil and a .75″ silk dome tweeter that perfectly matches the sensitivity and performance of the woofer for outstanding full-range reproduction. Among its many features, Intrinsic Correction™ voicings can be deployed to optimize installation and performance.

Achieve coherent transition between transducers with Directivity Matched Transition™ (DMT), QSC’s design philosophy where the high-frequency waveguide is matched to the natural conical behavior of the woofer at the crossover point. DMT’s improved off-axis power response results in consistent 120° conical coverage.

Specification

System Details	AD-S4T
Effective frequency range¹	68 Hz - 20 kHz
Rated noise power / voltage²	50 watts / 20 volts (rms)
Broadband sensitivity³	87 dB SPL
Coverage angle (-6 dB)	120° conical DMT™
Directivity factor (Q)	6
Directivity Index	8 dB
Maximum continuous SPL⁴	104 dB
Maximum peak SPL⁴	110 dB
Rated impedance	8 ohms
Recommended amplifier power (loudspeaker "program" power)	100 watts
Transformer taps	70 V: 30, 15, 7.5, 3.75 W and 8Ω bypass 100V: 30, 15, 7.5 W and 8Ω bypass
HF transducer	0.75-inch silk dome tweeter / 0.75-inch voice coil, horn loaded
LF transducer	4.5-inch weather resistant paper cone woofer 1-inch / 25 mm voice coil
Input connector type	Euroblock connector with parallel output terminals
Enclosure material	Painted ABS polymer
Grille material	Powder coated aluminum
X-Mount material	Powder coated aluminum
Enclosure Details
Ingress protection	IP-54
Operating environment	Designed for indoor and outdoor use
Testing	The AD Series loudspeakers qualified for outdoor use using the following tests: Salt fog: MIL-STD-810G Method 509.5 for 100 hrs. Humidity: MIL-STD-810G Method 507.5, Natural cycle B2, cyclic high RH for 7 days High and low temperature: tested to QSC internal standards between -20° and 50° C
Net weight	6.5 lb / 2.9 kg
Product dimensions (HWD) inches	10.3 × 6.34 × 6.42
Product dimensions (HWD) mm	261 × 161 × 163
Shipping weight	16.8 lb / 7.65 kg (pair packed)
Shipping dimensions (HWD) inches	15.5 × 10.3 × 18 (pair packed)
Shipping dimensions (HWD) mm	394 × 261 × 458 (pair packed)
Included accessories	X-Mount mounting system, Euroblock connector, input panel cover

Features

4.5-inch weather treated woofer; 0.75-inch silk dome tweeter
120° conical DMT™ coverage
30 watt low-saturation and low-loss 70/100V transformer with 8Ω bypass
Maximum peak SPL 110 dB (8 ohm bypass)
Directivity Matched Transition^® (DMT) ensures smooth, uniform frequency response over the coverage area
X-Mount™ system enables the loudspeaker to be easily installed and deployed at a variety of angles with no slippage over time
Advanced Intrinsic Correction™ voicings available via Q-SYS™
Lightweight ABS enclosures offer long-term durability and lasting good looks
Sealed input panel cover and powder coated aluminum grilles for added weather resistance
Meets IEC60529 IP-54 for dust and splash resistance
Available in black (RAL 9011) or white (RAL 9010)
Complete EASE, CF2, CAD, and BIM information available online