Atlas Sound XLTE owner manual Community Professional Loudspeakers

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COMMUNITY PROFESSIONAL LOUDSPEAKERS

A TRADITION OF EXCELLENCE AND INNOVATION FOR OVER 30 YEARS

Before 1967, most sound reinforcement systems were made up of components designed for use in movie theaters. Although these components worked well in theaters, the enclosures were large, bulky, heavy, and lacked output capability in the critical midrange portion of the audio spectrum. This was very evident to a young audio engineer named Bruce Howze, who was already involved in the fledgling touring sound industry, working with various rock groups. He had a vision for a better way and, as a result, founded Community Light & Sound in 1967.

His concept was simple – design and build products that meet the needs of sound reinforcement with consistently better products at a fair price. He also felt loudspeaker performance should be described in real-world terms. Community is now well known as one of the only loudspeaker manufacturers to publish accurate, detailed, and essentially raw performance data on its products using TEF™ measurements at realistic listening distances.

Community’s first product, dubbed the "LMF", was a fiberglass mid-bass horn for a 12 in. / 305 mm driver. It was efficient, amazingly light, yet strong, making it ideal for touring use. Since then, Community has been distinctively associated with fiberglass and with paying close attention to efficiency in converting electrical into acoustic energy.

Community continued to develop other unique products. The M4™ driver hit the market in 1981. This high power, midrange compression driver covers the most critical portion of the audio spectrum – 200 Hz to 2000 Hz. This removed the need for the usual crossover point right in the middle of the speech range. In keeping with not designing “me too” products, the M4 diaphragm was made of thin aluminum skins sandwiching a structural foam core – a fabrication technique still unique to Community. Recently the M4 has evolved with the development of a nonpareil carbon fiber diaphragm virtually eliminating diaphragm failure. The M200™ midrange driver appeared 2 years after the M4 with an innovative diaphragm of aluminized mylar. Community has also demonstrated to the world that big sound can come from small boxes, with the RS/VBS™ Series of electronically-controlled loudspeaker systems that has now evolved into the Community Solutions™ series.

Most recently, Community has captured the audio world’s attention again with a number of innovative products: the Leviathan II full-range horn system, the VHF100™ high frequency compression driver, the EM280™ and EM282™ extended midrange, carbon fiber diaphragm compression drivers. The EM282, M4, and VHF100 are the drivers used in the revolutionary, forced-air cooled AirForce Concert System. With AirForce Community has, in a sense, come full circle from the LMF, but this time with incomparable performance and hardware for a complete touring system.

Community’s History of Technological Firsts Include:

First successful fiberglass MF / HF horns and giant fiberglass bass horns.

First compression loaded midrange horn for touring systems – The LMF.

First suspensionless diaphragm HF driver – VHF100.

First midrange decade (200 Hz to 2 kHz) high power compression driver – M4.

First carbon fiber diaphragm compression drivers – M4, EM280, EM282.

First Ferrofluid-cooled professional woofers – VBS Series.

First product series with all drivers Ferrofluid-cooled – SLS/SBS Series.

First forced-air cooled drivers for touring system loudspeakers – AirForce.

First passive loudspeakers with internal multi-band and multi-level processing – CSX-S2.

First triaxial full-range horn system – Leviathan II.

First sound reinforcement application of TDS (Time Delay Spectrometry) for signal-alignment – RS440.

First integral signal-aligned 3-way sound reinforcement systems – RS Series.

First TEF/TDS documented loudspeaker line – RS/VBS.

First 3-way cinema systems – Paramount Exec. Theatre, Warner Bros. screening theatre/dubbing rooms.

First electro-acoustic system to equal the sound level of pneumatic warning sirens.

First to provide loudspeakers for sound coverage of an entire country – Denmark Emergency System.

First comprehensive calibrated testing of sound reinforcement products.

First to publish AudioCAD data on CD-ROM.

First professional audio company with an Internet web site – http://www.loudspeakers.net

First compact, weather-resistant, full-range horn systems - R2 Series.

First custom configurable outdoor systems - WET Series

PAGE 1 Community XLT / XLTE Series Owner’s Manual

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Contents FULL-RANGESYSTEMS AND SUBWOOFERS XLT / XLTEPage COMMUNITY PROFESSIONAL LOUDSPEAKERS Community Light & Sound, Inc. 333 East 5th Street EC STATEMENT OF CONFORMITYDIN EN 55013 08-1991 DIN EN DIN ENPAGE TABLE OF CONTENTSDIAGRAMS and TABLES CHAPTER1.3IMPORTANT SAFETY INFORMATION 1 INTRODUCTION1.2MODEL NUMBER USAGE IN THIS MANUAL 2 UNPACKING AND INSPECTION Page Page Figure 1 Physical Features 3.2FEATURES DESCRIPTIONS 3 PHYSICAL FEATURES See FIGURE3.1FEATURES MATRIX Table 1 Physical Features MatrixPhillips pan-head screws Footnotes for Physical Features4.3.2Mid Frequency Driver 46 models only 4.1ABBREVIATED OPERATING INSTRUCTIONSTable 2 Product Listing 4.3DRIVERS 4.3.1High Frequency Driver4.4PATTERN CONTROL HORNS 4.6.1PASSIVE / BIAMP Switch4.6.2HF-LevelSwitch 4.3.4Ferrofluid Cooling4.6.3Subwoofer Full-RangeOutput 4.6.4PowerSense DDP Circuit4.6.5PowerSense Indicators 4.7POWER HANDLING4.8.4Carrying Handles 4.8.1Permanent Mounting4.8.2Corner Protectors and Stacking XLT only 4.8.3Feet XLTE only4.8.641 Positioning and Horn Rotation 4.9OPTIONAL ACCESSORIES4.9.1Community Accessories 4.9.23rd Party Accessories5 SETUP AND OPERATION 5.1CHOOSING A POWER AMPLIFIER5.1.2Power Amplifier Load Impedance Table 5 Recommended Amplifier Power for Subwoofer FIGURE 2 PASSIVE Mode Configurations FIGURE 3 BIAMP Mode Configurations 6.1LOUDSPEAKER CABLE 6 ELECTRICAL INSTALLATION6.1.1Loudspeaker Wire Gauge Table 6 Loudspeaker Wire Gauge Selection6.2.1Choosing an Input Jack 6.2.2Internal Input Jack Wiring6.3.1Parallel Connector Wiring 6.3.2Load Impedance When Paralleling Loudspeakers6.4CONNECTING THE LOUDSPEAKERS 6.4.1PASSIVE Mode Wiring See FIGUREFIGURE 4: Wiring for PASSIVE Mode Full-Range 6.4.3Subwoofers See FIGURE 6.4.2BIAMP Mode Wiring See FIGUREFIGURE 5 Wiring for BIAMP Mode Full-Range FIGURE 6 Wiring for Subwoofer7.1.2Custom Grille Cloth 7 PHYSICAL INSTALLATION7.1.1Removing and Re-installingthe Grille 7.1FRONT GRILLEIMPORTANT NOTE Mounting/Rigging Point Holes 7.3.1Model 41 Horn Orientation7.3.2Model 42 and 7.4MOUNTING AND RIGGINGDANGER 7.4.2Using the Community CSSUPKIT Suspension KitFIGURE 7 Mounting Point Detail - Pull Direction FIGURE 8 XLT Mounting PointsFIGURE 9 XLTE Mounting / Rigging Points 7.4.3Using the Community WB1 Mounting Accessory7.4.4Stand Bracket Inserts 46 and 48 only DANGER See FIGURE7.5.1Using the Community EYBLTKIT FIGURE 10 XLTE Mounting / Rigging Point Detail7.6STACKING ENCLOSURES 8.2.1Electronic Gain Structure 8 ACOUSTICAL ADJUSTMENTS8.1INITIAL TESTING 8.2FINAL ADJUSTMENTS8.2.2Residual Noise 8.2.3Volume Level Balancing8.4FINAL RESULTS 8.3.1HF-LevelSwitch8.3EQUALIZATION 8.3.2Equalization Tips9.1.2PowerSense DDP Circuit Operation 9 OPERATING PRECAUTIONS9.1POWERSENSE DDP 9.1.1Operating Modes and PowerSense DDPFIGURE 11 Amplifier Clipping 9.3ACOUSTIC VOLUME LEVEL PRECAUTIONSFIGURE 12 Sound Exposure Limits 9.4TESTING AND TEST SIGNALS10.1.2MF and HF Drivers 10.1ACCESSING THE DRIVERS10 SERVICING THE LOUDSPEAKER 10.1.1LF Drivers11.1FULL-RANGEMODELS 11 TECHNICAL SPECIFICATIONS11.2MONITOR SPEAKERS AND SUBWOOFERS 12 IN CASE OF DIFFICULTY No bass No high frequencies Transferable Limited Warranty 13WARRANTY INFORMATION AND SERVICE9907007F A. XLT41E and XLT48E Additional Models Table 8 Additional Model SpecificationsC. Specifications APPENDIX - XLT41E and XLT48EINDEX Page Page Page Page Page 333 East 5th Street, Chester, PA Phone 610 876-3400Fax1999 Community Light & Sound, Inc. 991015Cm