QSC AD-S28Tw – AcousticDesign Dual 8-Inch 2-Way Surface-Mount Loudspeaker (Black)

Product Overview

The QSC AD-S28Tw is a professional surface-mount subwoofer that adds low-frequency enhancement to ceiling- or surface-mounted AcousticDesign loudspeakers. A dual 8-inch bandpass design, it is built for humidity-prone and demanding commercial installations.

With a marine-grade plywood cabinet, a 70/100V multi-tap transformer with 8-ohm bypass, and multiple mounting options, the AD-S28Tw is a versatile low-frequency companion for distributed AD-series systems.

Product Description

The AD-S28Tw houses a pair of 8-inch polypropylene woofers in a dual-chamber ported bandpass enclosure with a large port that extends low-frequency response. A defeatable passive 120 Hz low-pass filter with impedance compensation tailors the crossover, and high power handling of 250W continuous / 700W peak delivers tight, efficient bass.

A 70/100V multi-tap transformer with an 8-ohm bypass mode and standard screw-terminal connectors lets the subwoofer connect to virtually any professional distributed or low-impedance system. The marine-grade plywood cabinet, zinc-plated steel grille, molded ABS endcaps, and rotatable logo provide exceptional humidity resistance.

Flexible mounting options include the included rubber feet for freestanding use, forged-shoulder eyebolts, and a steel yoke for suspended installation. The AD-S28Tw is an ideal companion to QSC AcousticDesign satellites such as the AD-S6T and AD-S8T.

Key Features

• Dual 8-inch bandpass design — A dual-chamber ported bandpass enclosure with one sealed and one ported chamber delivers efficient, tight bass with strong low-frequency extension.
• Polypropylene woofers — A pair of 8-inch polypropylene woofers provide clear, strong bass and resist humid environments.
• Marine-grade plywood cabinet — The cabinet offers exceptional humidity resistance, complemented by a zinc-plated steel grille and molded ABS endcaps.
• Defeatable 120 Hz low-pass filter — A passive 120 Hz low-pass filter with impedance compensation can be engaged or bypassed to match the system crossover.
• 70/100V transformer with 8-ohm bypass — A multi-tap transformer with standard screw terminals connects to virtually any professional distributed or low-impedance system.
• High power handling — Handles 250 W continuous and 700 W peak for substantial low-frequency headroom.
• Multiple mounting options — Included rubber feet, forged-shoulder eyebolts, and a steel yoke support freestanding or suspended deployment.

Typical Applications

• House of worship
• Commercial meeting space
• Multi-purpose room
• Training room
• Auditorium

Technical Specifications

Competitor Comparison

Frequently Asked Questions

What is the AD-S28Tw designed to do?
It adds low-frequency enhancement to ceiling- or surface-mounted AcousticDesign loudspeakers, extending system bass in distributed or low-impedance installations.

Can the low-pass filter be turned off?
Yes. The passive 120 Hz low-pass filter with impedance compensation is defeatable, so you can use an external system crossover instead.

How can it be mounted?
It ships with rubber feet for freestanding use, plus forged-shoulder eyebolts and a steel yoke for suspended installation.

What warranty and support come with this loudspeaker?
QSC installed loudspeakers are covered under QSC's standard limited warranty; refer to QSC's published warranty terms for the current coverage period applicable to this model. Creation Networks provides pre- and post-sale support for system design and integration questions.

Explore related QSC products at Creation Networks, including the QSC AD-S8T.