Owner's Manual

Introduction

Congratulations and thank you for your purchase of this subwoofer. The AD-S28Tw model offers excellent acoustic perfor-

mance in an easy-to-install and attractive enclosure. Please review these instructions and carefully follow the recommenda-

tions. Consult a licensed installation professional if you are uncertain about any mounting issues.

The AD-S28Tw features dual 8” (200 mm) low frequency (LF) drivers in a ported bandpass enclosure. The AD-S28Tw is

equipped with an audio transformer suitable for 70V and 100V distributed systems, as well as a tap-selector switch which

can bypass the transformer for 8 ohm applications. The AD-S28Tw also includes a bypassable 120Hz low pass ﬁlter. The

marine-grade plywood enclosure may be used in ﬂoor-standing as well as yoke mounted and suspended applications.

What’s Included

Your surface mount subwoofer includes: - the loudspeaker cabinet with grille

- extra grille backing foam sheet

- steel yoke bracket

- steel suspension point shear plates (x3)

- steel M6 forged shoulder eyebolts (x4)

- hex head / phillips-head M6 bolts (x3)

- ﬂat washers (x4)

- rubber yoke mounting gaskets (x2)

- rubber feet with integrated attachment bolts (x4)

Features

1 - Marine grade plywood enclosure, painted

2 - ABS grille endcaps

3 - Steel grille with foam backing

4 - Rotatable QSC logo badge

5 - Integrated M6 suspension points

6 - Input cup with rotating door (see detail)

7 - Rubber feet (shown attached)

8 - Service access panel

9 - Low Pass Filter Switch

10 - Transformer tap switch

11 - Input cup door (shown in open position)

12 - Input screw terminals