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Item #: ACS4TBK
MSRP: $272.00


4.5-inch 2-way, 130° conical



  • 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

Prop 65WARNING: This product contains chemicals including Styrene which is known to the state of California to cause cancer, and Bisphenol A (BPA), which is known to the state of California to cause birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

In certain instances promotional prices will be offered listed above as a “Price with Rebate”, and are typically dated. In these cases Instant Rebate (IR) pricing is good sometimes only for the day only or only for the week. In order to be eligible for IR pricing – the order must be paid for AND picked up/shipped out. If you are placing an online order outside of business hours within your respective time zone, please add a note to your order for the team to confirm the pricing, or contact the branch the following business day to ensure that the item pricing carries over into the subsequent period. If an alternate branch location is still open in another time zone, please reach out to that group.

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