Atlas Sound XLTE owner manual No high frequencies

Page 42

No high frequencies.

High frequency driver or

Listen at low level to the high frequency driver. If some sound is heard

 

crossover is malfunctioning.

from this area and it is not distorted, it is probably a crossover

 

 

problem. If distorted sound or no sound is heard, the driver or

 

 

crossover may not be working properly. Replace as needed.

 

SYMPTOM - SUBWOOFER

PROBABLE CAUSE

WHAT TO DO

 

 

 

 

No bass using Neutrik connector

Neutrik connector not seated

Make sure Neutrik connector is fully seated by twisting it clockwise

 

 

about 1/4 turn after plugging it in. Then engage the locking ring.

 

Distortion, low volume, or no volume

Cold/open solder joint on the

Using an ohmmeter, check the continuity of the crimp connectors, all

from any or all drivers.

input panel or faulty wiring

solder joints on the input panel and the wiring to the drivers.

Also

 

connection.

visually inspect solder joints as cold joints may only malfunction with

 

 

higher current than the ohmmeter supplies. Repair as needed.

 

No bass or bass is weak using an

No signal to the subwoofer.

Check that the electronic crossover has subwoofer output, that it is

electronic crossover.

 

properly connected to the amplifier, that the amplifier is properly

 

 

connected to the subwoofer, and that there is sufficient gain to drive

 

 

the subwoofer in relation to the full-range loudspeakers.

 

Bass is weak.

Incorrect subwoofer polarity.

Verify the polarity is correct: + and - amplifier outputs go to + and -

 

 

on loudspeaker. Note that in some cases, due to physical loudspeaker

 

 

placement, a reversed polarity connection will provide better coupling

 

 

to the full-range loudspeaker. Check by changing the polarity.

 

Bass is weak.

Poor physical placement.

Note that in some cases, the physical placement of a subwoofer can

 

 

have a significant effect on the bass energy in the listening area. If

 

 

possible, move the subwoofer at least 10 feet from its present location

 

 

to see if the bass energy changes. If it does than you may have to

 

 

change the subwoofer location.

 

No bass from 51.

Driver is not functioning.

Disconnect the amplifier and, using an ohmmeter, measure the

 

 

resistance at one of the input jacks. If the meter reads as an open

 

 

circuit, the LF drivers may not be working. Replace as needed.

 

Bass is weak on model 55.

One driver not functioning.

Disconnect the 2 wires from the amplifier, switch the loudspeaker to

(Note: The 55 has 2 LF drivers wired in

 

BIAMP mode, and, using an ohmmeter, measure the resistance

parallel.)

 

between the wires. If the meter reads about 6 Ohms one LF driver may

 

 

not be working. 3 Ohms is the normal reading. Replace as needed.

No bass from 55.

Both drivers may not be

Disconnect the 2 wires from the amplifier and, using an ohmmeter,

(Note: The 55 has 2 LF drivers wired in

functioning.

measure the resistance between the wires. If the meter reads an open

parallel.)

 

circuit, both LF drivers may not be working. Replace as needed.

 

No bass or bass is weak in system.

Subwoofer is not functioning.

Assuming all cabling and connections for the amplifiers are OK, listen

 

 

to the subwoofer at moderate levels for output from the driver(s). If

 

 

there is none the driver(s) may be malfunctioning and need repair.

 

FULL-RANGE OPERATED FROM SUBWOOFER FULL-RANGE OUTPUT

 

 

 

 

 

 

SYMPTOM

PROBABLE CAUSE

WHAT TO DO

 

 

 

 

No sound from full-range loudspeaker.

High pass crossover not

Disconnect subwoofer and connect full-range loudspeaker directly to

 

working.

the power amplifier. If it works OK then the crossover in subwoofer

 

 

is probably not working. If it does not work OK, see symptoms for

 

 

full-range loudspeakers.

 

No sound from full-range loudspeaker.

Cold or open solder joint on

Using an ohmmeter, check the continuity of the crimp connectors, all

 

the subwoofer input panel or

solder joints on the input panel and the wiring to the drivers.

Also

 

faulty wiring connection.

visually inspect solder joints as cold joints may only malfunction with

 

 

higher current than the ohmmeter supplies. Repair as needed.

 

Low volume from full-range

Acoustic balance not optimum.

When using the FULL-RANGE output on the subwoofer to feed a full-

loudspeaker or subwoofer.

 

range loudspeaker, the acoustic balance between them is determined

 

 

by their efficiencies. If this balance is not suitable then separate

 

 

amplifiers for the subwoofer and full-range loudspeaker are

 

 

recommended. The acoustic balance can then be adjusted using the

 

 

amplifier input level controls.

 

No sound from subwoofer.

Subwoofer not working.

See symptoms for subwoofers.

 

 

 

 

 

POLARITY CHECK FOR TWO LOUDSPEAKERS OR SUBWOOFERS

 

 

 

 

Sound image is poor and bass weak

Stand in front of and exactly between the loudspeakers or subwoofers. Play a mono source through

 

the system. If the sound does not appear to come solidly from a point between the loudspeakers

 

and/or the bass is weak, they are probably out of polarity. Check the + and - wiring for the entire

 

signal chain to each loudspeaker. The wiring should be identical.

 

PAGE 40 Community XLT / XLTE Series Owner’s Manual

Page 41 Page 43
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Contents XLT / XLTE FULL-RANGESYSTEMS AND SUBWOOFERSPage COMMUNITY PROFESSIONAL LOUDSPEAKERS DIN EN EC STATEMENT OF CONFORMITYDIN EN 55013 08-1991 DIN EN Community Light & Sound, Inc. 333 East 5th StreetCHAPTER TABLE OF CONTENTSDIAGRAMS and TABLES PAGE1.3IMPORTANT SAFETY INFORMATION 1 INTRODUCTION1.2MODEL NUMBER USAGE IN THIS MANUAL 2 UNPACKING AND INSPECTION Page Page Figure 1 Physical Features Table 1 Physical Features Matrix 3 PHYSICAL FEATURES See FIGURE3.1FEATURES MATRIX 3.2FEATURES DESCRIPTIONSFootnotes for Physical Features Phillips pan-head screws4.3.1High Frequency Driver 4.1ABBREVIATED OPERATING INSTRUCTIONSTable 2 Product Listing 4.3DRIVERS 4.3.2Mid Frequency Driver 46 models only4.3.4Ferrofluid Cooling 4.6.1PASSIVE / BIAMP Switch4.6.2HF-LevelSwitch 4.4PATTERN CONTROL HORNS4.7POWER HANDLING 4.6.4PowerSense DDP Circuit4.6.5PowerSense Indicators 4.6.3Subwoofer Full-RangeOutput4.8.3Feet XLTE only 4.8.1Permanent Mounting4.8.2Corner Protectors and Stacking XLT only 4.8.4Carrying Handles4.9.23rd Party Accessories 4.9OPTIONAL ACCESSORIES4.9.1Community Accessories 4.8.641 Positioning and Horn Rotation5 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 Table 6 Loudspeaker Wire Gauge Selection 6 ELECTRICAL INSTALLATION6.1.1Loudspeaker Wire Gauge 6.1LOUDSPEAKER CABLE6.3.2Load Impedance When Paralleling Loudspeakers 6.2.2Internal Input Jack Wiring6.3.1Parallel Connector Wiring 6.2.1Choosing an Input Jack6.4CONNECTING THE LOUDSPEAKERS 6.4.1PASSIVE Mode Wiring See FIGUREFIGURE 4: Wiring for PASSIVE Mode Full-Range FIGURE 6 Wiring for Subwoofer 6.4.2BIAMP Mode Wiring See FIGUREFIGURE 5 Wiring for BIAMP Mode Full-Range 6.4.3Subwoofers See FIGURE7.1FRONT GRILLE 7 PHYSICAL INSTALLATION7.1.1Removing and Re-installingthe Grille 7.1.2Custom Grille Cloth7.4MOUNTING AND RIGGING 7.3.1Model 41 Horn Orientation7.3.2Model 42 and IMPORTANT NOTE Mounting/Rigging Point HolesFIGURE 8 XLT Mounting Points 7.4.2Using the Community CSSUPKIT Suspension KitFIGURE 7 Mounting Point Detail - Pull Direction DANGERDANGER See FIGURE 7.4.3Using the Community WB1 Mounting Accessory7.4.4Stand Bracket Inserts 46 and 48 only FIGURE 9 XLTE Mounting / Rigging Points7.5.1Using the Community EYBLTKIT FIGURE 10 XLTE Mounting / Rigging Point Detail7.6STACKING ENCLOSURES 8.2FINAL ADJUSTMENTS 8 ACOUSTICAL ADJUSTMENTS8.1INITIAL TESTING 8.2.1Electronic Gain Structure8.2.3Volume Level Balancing 8.2.2Residual Noise8.3.2Equalization Tips 8.3.1HF-LevelSwitch8.3EQUALIZATION 8.4FINAL RESULTS9.1.1Operating Modes and PowerSense DDP 9 OPERATING PRECAUTIONS9.1POWERSENSE DDP 9.1.2PowerSense DDP Circuit Operation9.3ACOUSTIC VOLUME LEVEL PRECAUTIONS FIGURE 11 Amplifier Clipping9.4TESTING AND TEST SIGNALS FIGURE 12 Sound Exposure Limits10.1.1LF Drivers 10.1ACCESSING THE DRIVERS10 SERVICING THE LOUDSPEAKER 10.1.2MF and HF Drivers11 TECHNICAL SPECIFICATIONS 11.1FULL-RANGEMODELS11.2MONITOR SPEAKERS AND SUBWOOFERS 12 IN CASE OF DIFFICULTY No bass No high frequencies 13WARRANTY INFORMATION AND SERVICE Transferable Limited Warranty9907007F APPENDIX - XLT41E and XLT48E Table 8 Additional Model SpecificationsC. Specifications A. XLT41E and XLT48E Additional ModelsINDEX Page Page Page Page Page 333 East 5th Street, Chester, PA Phone 610 876-3400Fax1999 Community Light & Sound, Inc. 991015Cm
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