AcousticDesignTM Surface-mount Loudspeaker User Manual AD-S28Tw Dual 200 mm (8 in) Bandpass Subwoofer EN *TD-000287-00-A* TD-000287-00-B
important safety precautions EN 1 - Read these instructions. 2 - Keep these instructions. 3 - Heed all warnings. 4 - Follow all instructions. 5 - Clean only with a dry cloth. 6 - Install in accordance with all QSC instructions and documentation.
Introduction Congratulations and thank you for your purchase of this subwoofer. The AD-S28Tw model offers excellent acoustic performance in an easy-to-install and attractive enclosure. Please review these instructions and carefully follow the recommendations. 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.
Installation Options The AD-S28Tw has been designed for installation flexibility. The subwoofer may be mounted using a number of different suspension techniques, as well as being easily shelf or floor mounted. The QSC logo on the grille is rotatable to accommodate horizontal or vertical orientation. While low frequency products do not have directional dispersion characteristics, all of the sonic energy produced by this subwoofer exits the cabinet through the port due to the ported bandpass design.
Mounting the Subwoofer Using the Yoke The yoke can be used to mount the subwoofer either on a vertical surface, like a wall, or from an overhead surface, like a ceiling or ceiling beams. In either case, the attachment points on the enclosure for securing the yoke are the same. The yoke is designed to attach to only two sides of the cabinet and cannot be attached to any other surfaces.
Any unused attachment point can be used as a safety/seismic secondary attachment. Attach an eyebolt to an available attachment point according to the section of the manual titled: Suspending the Subwoofer Using Eyebolts and Shear Plates. Be sure to leave less than 12 in (300 mm) of slack in the secondary attachment cable. The safety/seismic secondary attachment must be secured to structure that is capable of supporting the weight of the subwoofer and must be connected using load rated hardware.
The locations of the eyebolts were designed to suspend the subwoofer using the fewest number of attachment points. Where possible there are only three attachment points to be used. These points are located so that the triangle they form “encloses” the center of gravity and the subwoofer will balance with all three points suspended. In some cases, one or more of the attachment points is not on a cabinet side that is facing up. In these cases DO NOT USE AN EYEBOLT.
Once the subwoofer is secured in position, the QSC logo can be rotated if desired. If the logo is difficult to rotate the first time, a tool may be required. A small flat-head screw driver is recommended. Gently work the tool between the logo badge and the grille to allow rotation. Exercise care to avoid scratching the grille surface. Any unused attachment point can be used as a safety/seismic secondary attachment.
Specifications AD-S28Tw Frequency Response1: 42 - 165 Hz (-3 dB), 36 - 205 Hz (-10 dB) Maximum Output2: (Calculated) 118 dB SPL continuous rms output 124 dB SPL peak output Transducers: Dual 8 inch (200 mm) weather resistant, polypropylene cone woofer, rubber surround Impedance (ohm): 8.0 nom. / 9.5 min at 77 Hz with LPF “IN” / 5.3 min at 63 Hz with LPF “OUT” Power Handling3: RMS (IEC 2hrs): 250 W Recommended amp rating: 500 W EN Sensitivity: 94 dB, 2.
AD-S28Tw Dimensions 50 mm (1.9) 574 mm (22.6) 394 mm (15.5) EN 10 mm (0.4) 125 mm (4.9) 251 mm (9.9) 404 mm (15.9) 109 mm (4.3) 114 mm (4.5) 288 mm (11.3) 254 mm (10.0) 574 mm (22.6) 125 mm (4.9) 251 mm (9.9) 10 603 mm (22.75) 404 mm (15.
AD-S28Tw Yoke Dimensions 18 mm (0.7) EN 400 mm (15.75) 28 mm (1.1) 13 mm (0.5) 64 mm (2.5) 127 mm (5.0) 405 mm (15.9) 11 203 mm (8.
How to Contact QSC Audio Products, LLC Cómo comunicarse con QSC Audio Products, LLC Comment prendre contact avec QSC Audio Products, LLC Kontaktinformationen für QSC Audio Prodcuts, LLC QSC Audio Products, LLC EN Mailing Address: QSC Audio Products, LLC 1675 MacArthur Boulevard Costa Mesa, CA 92626-1468 USA Telephone Numbers: Main Number (714) 754-6175 Sales & Marketing (714) 957-7100 or toll free (USA Only) (800) 854-4079 Customer Service (714) 957-7100 or toll free (USA Onl
