QSC Audio Speaker AD S52T User Guide

High-power Two-way Multi-Use Loudspeaker  
• two 8-inch (203mm) neodymium magnet low-frequency drivers  
• 1-inch throat compression high-frequency driver  
• yoke mount  
I-282H  
Speakon® input, pole cup, and floor-mount swivel feet. Bi-amp capable, 8 ohm  
AD-S282H  
AD-S282HT  
bi-amp capable, 8 ohm  
70V/100V transformer equipped, bypassable to 8 ohm  
*TD-000148-00*  
TD-000148-00 rev.A  
 
Introduction  
Thank you and congratulations on your purchase of the I-282H, AD-S282H, or AD-S282HT  
multi-use, weather resistant loudspeakers. These products represent the state-of-the-art  
in lightweight sound reinforcement loudspeaker systems. To get the most from your  
investment, we encourage you to review this manual carefully.  
These loudspeaker systems are full range, high output, two-way designs delivering supe-  
rior sound quality and high SPL in a weather resistant enclosure. The low frequency driv-  
ers feature neodymium magnets, while the high frequency driver features a ferrite  
magnet. The included yoke mount provides secure and versatile installation. These loud-  
speakers make an excellent choice for a wide variety of applications. All models include  
an adapter plate for users who desire to use OmniMount®’s suitable loudspeaker mount-  
ing options.  
The I-282H features two Speakon® connectors wired in parallel for fast, reliable connec-  
tion and easy parallel connection of multiple loudspeakers. The Speakon connectors are  
wired for passive or bi-amp use and have a selector switch for bypassing the crossover  
when used in bi-amp applications. Additionally, the I-282H includes two swivel “outrig-  
ger” feet for converting the yoke mount to a floor monitor application.  
The AD-S282H and AD-S282HT models feature weather resistant input wiring covers and  
wiring strain relief bushings. They also include socket head screws for applications where  
enhanced mounting security may be desired (used in place of the yoke mount retaining  
knobs).  
The AD-S282H model is bi-amp capable and features a crossover bypass switch.  
The AD-S282HT is 70V/100V matching transformer equipped complete with an integral  
power-tap selector switch. The transformer may be bypassed for low impedance (8 ohm)  
application versatility. Two sets of parallel-connected input wiring barrier-strip terminals  
are provided for connecting multiple loudspeakers.  
What’s Included  
I-282H  
•I-282H loudspeaker (1 each)  
•Yoke mount (1 each)  
•Yoke mount retaining knobs (2 each)  
•M10 x 1.0 x 23mm socket head screws, with flat and lock washers for security-enhanced yoke mounting (2 each)  
•Yoke mount insert plugs for non-yoke mount applications (2 each)  
•Swivel feet and retaining knobs for floor monitor applications (2 each)  
•Self-adhesive rubber feet for swivels (4 each)  
•Omni-Mount adapter plate and M4 self-tapping retaining screw (1 each)  
•This User Manual  
AD-S282H and AD-S282HT  
•AD-S-282H or AD-S282HT loudspeaker (1 each)  
•Yoke mount (1 each)  
•Yoke mount retaining knobs (2 each)  
•M10 x 1.0 x 23mm socket head screws, with flat and lock washers for security-enhanced yoke mounting (2 each)  
•Yoke mount insert plugs for non-yoke mount applications (2 each)  
•Input wiring cover and gasket (1 each)  
•Input wiring cover retaining screws, M4 x 1.4 x 15 mm (2 each)  
•Input wiring strain relief bushing with wire hole (2 each, may be part of cover)  
•Input wiring strain relief bushing, no wire hole (1 each)  
•Strain relief bushing retaining nut with wire hole (2 each)  
•Strain relief bushing retaining nut, no wire hole (1 each)  
•Omni-Mount adapter plate and M4 self-tapping retaining screw (1 each)  
•This User Manual  
3
 
Grill Removal  
If it is necessary to remove the protective grill, do so with care as to avoid  
bending or distorting the grill. The grill is held in place by two retaining  
screws, one at the front edge of the top of the cabinet and one at the front  
edge of the bottom.  
Removing the Grill  
1- Using a #2 Phillips-head screwdriver, remove the two grill retaining  
screws.  
2- Carefully pry the grill from its retaining groove using a plastic flat-blade  
tool such as a plastic putty knife. Gently and evenly work the grill out of its  
retaining groove to avoid bending the grill.  
Coverage Angles  
Before mounting the loudspeaker, determine the mounting orientation and desired coverage  
angles. As supplied from the factory, the loudspeaker’s coverage angles are 90° (horizontal) x 60°  
(vertical) with the cabinet oriented vertically. The waveguide can be rotated to interchange the  
coverage angles.  
Rotating the Waveguide to Alter HF Coverage Pattern  
1- Remove the grill as outlined, above.  
2- Remove the eight waveguide retaining screws. A #2-size Phillips screwdriver is recommended.  
3- Reach into the waveguides port and pull gently to remove the waveguide. Be careful not to  
damage the connections, wiring, or the gasket between the waveguide and the cabinet.  
4- Rotate the horn 90° clockwise or counter clockwise and set it back in place. Make certain the  
wiring is not stressed or pulled loose from its connections.  
5- Before reinstalling the waveguide screws, lift the assembly a small distance and make sure  
that the gasket is properly in place. Reposition it, if required. Set the waveguide in place and  
reinstall the screws. Do not overtighten.  
6- Replace the grill and install the upper and lower grill retaining screws.  
4
 
Mounting  
IMPORTANT! ENSURE THAT THE LOUDSPEAKER IS  
Attach safety  
cable here  
MOUNTED PROPERLY AND A SAFETY CABLE IS INSTALLED  
TO RETAIN THE LOUDSPEAKER IN THE EVENT OF A MOUNT-  
ING FAILURE. CONSULT A LICENSED, PROFESSIONAL ENGI-  
NEER WHEN ANY DOUBT OR QUESTIONS ARISE REGARDING  
A PHYSICAL EQUIPMENT INSTALLATION.  
Safety Cable Attachment (all models)  
On the back of the loudspeaker, near the bottom, is a safety cable attachment  
point. Install a safety cable strong enough to support several times the  
weight of the loudspeaker assembly in the event it may fall. The cable must  
be secured to a secondary support point which is also strong enough to sup-  
port several times the loudspeaker’s weight.  
Yoke Mount (all models)  
For enhanced security,  
use the included M10  
socket head screws to  
secure the loudspeaker  
to the yoke mount.  
The included yoke mount handles most surface mounting applications. It is  
constructed of light, strong alloy and pre-drilled for ease of use. Integral  
bushings at the cabinet contact points ensure ease of positioning. A large  
center-hole is provided on the mounting surface side for wiring pass-through.  
Mount the yoke to a surface strong enough to support the weight of the loud-  
speaker assembly using suitable hardware (not included). If any doubt exists  
as to the suitability or strength of the mounting surface, consult a qualified  
professional engineer. After securing the yoke to the mounting surface, have  
an assistant hold the loudspeaker in place while installing either the retain-  
ing knobs or socket head screws with flat and lock washers (AD-S282H and  
AD-S282HT only). Once the loudspeaker has been positioned for desired  
acoustic coverage, tighten the hardware securely.  
Floor Monitor (I-282H only)  
The I-282H yoke mount comes with two swivel feet, four self-adhesive rub-  
ber feet, and retaining knobs. Attach the two of the rubber feet to each of  
the two swivel outrigger bars, one at each end. Press firmly in place to  
ensure adhesion. Then attach each of the two swivel outrigger bars to the  
yoke mount using the two small retaining knobs included. The rubber feet  
should be oriented away from the yoke mount. Swivel the outrigger bars per-  
pendicular to the long axis of the yoke and tighten the retaining knobs. Set  
the completed yoke assembly on the floor, resting on the rubber feet. Place  
the loudspeaker into the yoke and secure using the two large retaining knobs  
provided. Position the loudspeaker for desire acoustic coverage and tighten  
the retaining knobs securely.  
Pole Mounting (I-282H only)  
On the bottom of the I-282H is a pole cup that accepts 1.375” or 1.500” (35  
mm or 38 mm) pole diameters. For pole mounting, lift the loudspeaker into  
position over the pole end and set it onto the pole. Ensure the pole is fully  
and firmly seated into the pole cup of the loudspeaker.  
OmniMount adapter plate-  
OmniMount (all models)  
Attach to cabinet using provided M4 x 18mm  
self tapping screw, then attach OmniMount  
following manufacturer’s recommendations.  
For applications requiring the use of OmniMount’s Pro 60.0 mount, there is an  
adapter plate included. The adapter plate is used between the OmniMount  
bracket and the loudspeaker cabinet. Orient the plate with it’s curved side  
toward the loudspeaker and its safety cable access cut-out toward the bot-  
tom of the loudspeaker. Attach to cabinet using the provided M4 x 18mm  
self-tapping screw. Consult OmniMount’s literature and installation recom-  
mendations for proper and safe application of their product.  
We recommend the use of M8 x 1.25 x 50mm bolts for securing  
the OmniMount bracket to the loudspeaker cabinet.  
5
 
Input Connection Cover (AD-S282H/HT models)  
The loudspeaker includes a weather resistant cover for the input terminals. If  
using the cover, be sure to pass the wiring through the bushing nut, bushing,  
cover, and gasket before making connections.The input wiring cover is keyed  
to fit one way only! Be sure the keyed end is oriented toward the bottom of the  
loudspeaker cabinet. For proper sealing, we recommend #12 to #10 AWG (3.3  
Input connection  
cover assembly  
2
to 5.3mm ) stranded loudspeaker cable with a flat or twisted cross section. If  
using smaller gauge wiring, it may be necessary to use additional weather  
resistant compounds to achieve proper sealing of the wire entry points.  
•Pass the wires through the wire cover/gasket, bushing, and nut.  
•Strip the wires and connect to barrier strip screw terminals.  
•Slide the cover over the terminals and secure using the two machine  
screws provided.  
•Ensure gasket is seated properly; tighten compression nut.  
To assure weather-tight connections, make sure the input  
cover is installed with its keyed end toward the loudspeaker’s  
bottom, fits flush against the loudspeaker cabinet, all gaskets  
are properly placed, and has all hardware tightened suffi-  
ciently.  
Mode selector switch  
Bi-amp / Passive Mode Selector Switch (I-282H and AD-S282H models)  
Before applying signal to the loudspeaker, ensure the BI-AMP / PASSIVE mode selector switch is set  
to the appropriate position. Use a coin or flat-tipped screwdriver to change the switch position.  
BI-AMP  
Bi-amp mode requires pre-processing of the signal before the loudspeaker so that low-frequency  
signal only is connected to the LF terminals, and high-frequency only signal is connected to the HF  
terminals. The internal crossover network is bypassed completely when the switch is set to BI-AMP.  
PASSIVE  
Passive mode utilizes the loudspeaker’s internal crossover network and requires a full-range signal  
be applied to the PASSIVE terminals. Do not use the terminals marker HF when using the loud-  
speaker in passive mode.  
Set the mode selector switch to the appropriate position before applying signal to  
the loudspeaker to avoid the possibility of damaging the drivers.  
Transformer Tap Selector Switch (AD-S282HT  
Transformer tap selector switch  
Set the transformer tap selector switch to the appropriate setting before applying audio. To select  
the power level, align the tap selector switch slot with the desired power setting number. Use a coin  
or flat tip screwdriver to operate the switch.  
70V Distributed Systems: use the right side markings. Select from 25, 50, 100, or 200 watts.  
100V Distributed Systems: use the left side markings. Select from 50, 100, or 200 watts. the X  
position should not be used.  
8 Ohm low impedance Systems: Set the tap selector switch to 8 ohms.  
NOTE! 8 ohm setting should be used for 8 ohm audio systems only. Do not use 8  
ohm setting when connecting the AD-S282T loudspeaker to 70V/100V distributed  
audio systems.  
Set the tap selector switch to the appropriate position before applying signal to  
the loudspeaker to avoid the possibility of damage.  
6
 
Connection  
I-282H  
I-282H  
PASSIVE: Set the BI-AMP / PASSIVE selector switch to PASSIVE. Con-  
Speakon  
pinout  
nect the full-range + input signal to Speakon pin 1+ and the full range -  
input signal to Speakon pin 1-. The two Speakon connectors wired in paral-  
lel, allowing a second I-282H loudspeaker (also set for PASSIVE operation)  
to be connected directly to the remaining Speakon connector.  
ACTIVE: Set the BI-AMP / PASSIVE selector switch to BI-AMP. Con-  
nect the low frequency + signal to Speakon pin 1+ and the low frequency -  
signal to Speakon pin 1-. Connect the high frequency + signal to Speakon  
pin 2+ and the high frequency - signal to Speakon pin 2-. A second I-282H  
loudspeaker (also set for BI-AMP operation) may be connected in parallel  
by connecting it to the remaining Speakon connector using a four wire  
Speakon connection.  
Speakon plug  
pinout as viewed  
from wire-side  
AD-S282H  
PASSIVE: Set the BI-AMP / PASSIVE selector switch to PASSIVE.  
Connect the input to the PASSIVE + and PASSIVE - terminals on the rear  
of the loudspeaker. Do not use second set of terminals marked HF + and  
HF -.  
AD-S282H  
terminal  
pinout  
BI-AMP: Set the BI-AMP / PASSIVE selector switch to BI-AMP. Con-  
nect the low frequency signal to the terminals marked LF + and LF -. Con-  
nect the high frequency signal to the terminals marked HF + and HF -.  
AD-S282HT  
Connect the input to one set of the + and - terminals on the rear of the  
loudspeaker.  
AD-S282HT  
terminal  
pinout  
Additional loudspeakers may be connect to the second set of + and - ter-  
minals.  
7
 
Specifications- AD-S282H (passive), AD-S282HT, I-282H (passive)  
Frequency Range:  
80- 27.7k Hz (-6 dB, free field response)  
60- 29.5k Hz (-10 dB, free field response)  
2
Maximum Output :  
119dB SPL continuous rms output (calculated)  
125dB SPL peak output (calculated)  
Impedance:  
8 ohms nominal  
5.5 minimum at 17.6k Hz  
64.2 maximum at 2.56k Hz  
3
Power Rating :  
400 watts rms (IEC 268-5, 8 hours, 50-20k Hz, 6dB crest factor)  
800 watts rms  
Recommended Amp Power:  
Sensitivity:  
93dB, 1 watt, 1 meter, free field (4 pi)  
Nominal Coverage:  
Directivity Index and Q:  
90° horizontal x 60° vertical with waveguide as installed at factory  
Frequency  
500 Hz  
1k Hz  
DI  
Q
6.2  
9.5  
11.0  
9.5  
8.5  
8.0  
4.2  
8.9  
12.6  
8.9  
7.1  
6.3  
2k Hz  
4k Hz  
8k Hz  
16k Hz  
Transformer (AD-S282HT only)  
Taps (switch selectable)  
8 ohm bypass  
70V  
100V  
50, 100, and 200W  
Yes  
25, 50, 100, and 200W  
Yes  
Specifications are subject to change without notice.  
8
 
Specifications- AD-S282H and I-282H with Recommended Signal Processing  
Low Frequency Drivers (parallel)  
70- 2.1k Hz (-6 dB, free field response)  
60- 2.7k Hz (-10 dB, free field response)  
High Frequency Driver  
2.1k- 24.0k Hz (-6 dB, free field response)  
1.9k- 24.0k Hz (-10 dB, free field response)  
Frequency Range:  
Power Rating:  
400W (8 hrs., IEC268-5, 50- 2.0k Hz, 6dB crest factor) 50W (8 hrs., IEC268-5, 1.0k- 20.0k Hz, 6dB crest factor)  
800W 100W  
Recommended Amp Power:  
Nominal Coverage:  
90° horizontal x 60° vertical with waveguide as installed at factory  
Physical Specifications  
Weight:  
I-282H: 28.5 lb. net, 36.8 lb. shipping (12.9 kg., 16.7 kg.)  
AD-S282H: 27.7 lb. net, 35.6 lb. shipping (12.6 kg., 16.1 kg.)  
AD-S282HT: 32.9 lb. net, 40.8 lb. shipping (14.9 kg., 18.5 kg.)  
Enclosure and Grill:  
Controls  
painted high impact polystyrene, removable aluminum grill  
AD-S282HT: rotary tap selector switch  
AD-S282H and I-282H: Active / Passive mode selector rotary switch  
Connectors:  
I-282H- 2 NL4 Speakons wired in parallel  
AD-S282H- barrier strip screw terminals, 1 set used for passive, 2 sets used for bi-amp  
AD-S282HT- barrier strip screw terminals, 2 sets wired in parallel  
Mounting Hardware:  
All models- yoke mount with retaining knobs  
I-282H- includes swivel outrigger feet, retaining knobs, and rubber feet, integral pole cup accepts  
1.375” or 1.500” (35 mm or 38 mm) pole diameters  
AD-S282H and AD-S282HT: includes socket head screws and washers for enhanced security  
Specifications are subject to change without notice.  
9
 
Dimensions  
Specifications are subject to change without notice.  
10  
 
I-282H, AD-S282H, and AD-S282HT Beamwidth, Response, and Impedance Curves  
On-axis Response and Impedance Vs. Frequency, Passive  
SPL  
Impedance  
Frequency (Hertz)  
On-axis Response and Impedance Vs. Frequency, Bi-amp  
HF SPL  
LF SPL  
LF Impedance  
HF Impedance  
Frequency (Hertz)  
Specifications are subject to change without notice.  
11  
 
I-282H, AD-S282H, and AD-S282HT Beamwidth and On/Off Axis Response Curves  
Horizontal and Vertical Beamwidth Vs. Frequency  
Horizontal  
Vertical  
Frequency (Hertz)  
Response On-Axis, 15°, 30°,45°, and 60° Off-Axis Vs. Frequency  
15° Off Axis  
On Axis  
30° Off Axis  
45° Off Axis  
60° Off Axis  
Frequency (Hertz)  
Specifications are subject to change without notice.  
12  
 
Painting the Loudspeaker  
The loudspeaker enclosure, grill, and mount can be painted to match any decor, provided the following precautions are observed.  
The cabinet is made of high impact polystyrene which requires controlled painting procedures in order to obtain good results. Use a  
paint “system” designed for high impact polystyrene from any reputable paint supplier.  
1- Remove the grill.  
2- If painting mount and loudspeaker as a unit: Attach the ball mount or yoke mount.  
3- Mask the loudspeaker’s input connector.  
4- Mask the woofer, tweeter, and port being certain not to apply tape directly to the drivers. Alternatively, the inside of the grill can  
be completely masked and set in place on the loudspeaker enclosure for painting.  
5- Wash the components to be painted with a mild soap and hot water. Be careful not to get water on or into either of the drivers or  
the input connections. Rinse with hot water. Allow to dry thoroughly.  
6- Scuff-sand the components to be painted using red Scotchbrite® pad or 320 - 400 grit sandpaper.  
7- Using compressed air, remove all dust from the components to be painted. Do not blow compressed air directly into either driver.  
8- Clean the components to be painted.  
9- Using a clean, lint-free, white cloth, wipe the components to be painted with suitable prep solution.  
10- Apply adhesion promoter.  
11- Apply primer topcoat.  
12- Apply paint.  
13- Allow to dry for at least 8 hours before handling.  
13  
 
Notes:  
14  
 
Notes:  
15  
 
How to Contact QSC Audio Products  
Mailing address / Dirección postal / Adresse postale / 通信地址 :  
QSC Audio Products, Inc.  
1675 MacArthur Boulevard  
Costa Mesa, CA 92626-1468 USA  
Telephone Numbers / Números de teléfono / Téléphone / 电话 :  
Main Number  
USA (714) 754-6175  
Sales & Marketing  
Customer Service  
USA (714) 957-7100 or toll free (USA only) (800) 854-4079  
USA (714) 957-7150 or toll free (USA only) (800) 772-2834  
Facsimile Numbers / Números de fax / Télécopieur / 传真 :  
Sales & Marketing FAX  
Customer Service FAX  
USA (714) 754-6174  
USA (714) 754-6173  
World Wide Web / Site Web / 网址 :  
E-mail / Dirección electrónica:  
QSC Audio Products, Inc. 1675 MacArthur Boulevard Costa Mesa, California 92626 USA  
©2004 “QSC” and the QSC logo are registered with the U.S. Patent and Trademark Office.  
 

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