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4.5" Two-way surface speaker, 70/100V transformer with 8? bypass, 130° conical coverage, includes Yoke Mount. Available in white. Priced individually but must be purchased in pairs.


  • High quality transducers provide exceptional clarity through the critical voice range.
  • Improved musicality often not seen in typical BGM class products.
  • Ported baffle for increased low frequency extension down to 70 Hz.
  • Low saturation 70/100V transformers with 8 ohm bypass.
  • 4-pole Euroblock connector eases system wiring.
  • Advanced voicing via QSC Intrinsic Correction™, applied using Q-SYS processing or CXD amplifier platforms.
  • Available in black (RAL 9011) or white (RAL 9010).
  • Complete EASE, CAD & BIM information available online.
Specifications AC-S4T
Effective frequency range1 70 Hz–20 kHz
Rated noise power / voltage2 16 watts / 11.3 volts rms
Broad-band sensitivity3 85 dB SPL
Coverage angle (-6 dB) 130° conical (500 Hz–5 kHz)
Directivity factor (Q) 6
Directivity Index 8 dB
Maximum continuous SPL4 97 dB
Maximum peak SPL4 103 dB
Rated impedance 8 ohms
Recommended amplifier power 32 watts into 8 ohms
Transformer taps 70V: 16, 8, 4, 2, 1 watts
100V: 16, 8, 4, 2 watts
8 ohm bypass
LF transducer 114 mm (4.5-inch) Polypropylene woofer with 25 mm (1-inch) voice coil
HF transducer 25 mm (1-inch) Aluminium dome tweeter with 25 mm (1-inch) voice coil
Input connector type Euroblock connector with parallel output
Enclosure material UV treated, high impact ABS polymer
Grille material Powder coated steel
Yoke material Powder coated steel with brass inserts
Enclosure Details
  • Ingress protection
  • Operating environment
  • Operating Temperature Range

Designed for indoor use
-20 to 50° C (-4 to 122° F)
Product Dimensions (HWD) inches 9.1 x 6.3 x 5.9
Product Dimensions (HWD) mm 230 × 160 × 150
Net Weight 5.3 lb / 2.4 kg
Shipping weight 5.3 kg (11.8 lb)
pair packed
Shipping Dimensions (HWD) inches 11.5 × 8.1 × 14.5 
pair packed
Shipping Dimensions (HWD) mm 292 x 206 x 368
pair packed 
Included accessories Yoke mount system, euroblock connector

1 Free-field, -10 dB from on-axis sensitivity 
2 IEC60268-1 noise signal for 2 hours 
3 On-Axis, free-field sensitivity, 2.83V, 1 m 
4 Calculated from rated noise voltage and sensitivity

All specifications are subject to change without notice.


Synchrony Financial

Progressive Leasing

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