Description
The QSC AD-S28Tw-BK Acoustic Design Surface Mount Subwoofer is a professional-quality surface mount subwoofer designed to provide low frequency enhancement to ceiling or surface mount AD-series speakers. The subwoofer has a marine-grade plywood cabinet that houses a pair of 8" polypropylene woofers. The cabinet has a dual chamber ported bandpass design with a large port to extend low frequency response.
The subwoofer has a defeat able passive 120Hz low-pass filter with impedance compensation and a 70/100V multi-tap transformer that can also be bypassed for use with 8-ohm speaker systems, making it extremely versatile. The subwoofer can be mounted in a number of ways; freestanding with the included rubber feet, or suspended via forged-shoulder eyebolts or the included steel yoke.
Product Specifications:
Type: Surface Mount Bandpass Subwoofer, Ported
Frequency Response:
42-165Hz (-6dB)
36-205Hz (-10dB)
Filter: 120Hz Low-Pass, Passive, Bypass able
Impedance: 8 Ohms
Power Rating:
250W RMS (Continuous)
500W RMS (Max Recommended Amp Power)
Sensitivity: 94dB, 2.83V, 1 m, Half Space (2pi)
Product Weight: 43 lbs.
Shipping Weight: 59 lbs.
Shipping Dimensions (LxWxH): 29 x 20 x 15 Inches
Financing Options
Hassle-Free Financing Available
Get the gear you need now and pay over time. Perfect for working DJs, artists, and sound pros who need pro-grade speakers, lighting, and cases to stay competitive.
- Shop Pay & Afterpay for instant financing right at checkout
- Acima, Synchrony, Progressive & Snap lease-to-own and financing options
- Fast approvals so you buy today and pay monthly
Military & First Responder Discounts
We're proud to support those who serve. Active-duty military, veterans, and first responders qualify for a special discount on your gear. See our Military Discount details here and how to redeem.





