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Explanation of Graphic Symbols

The exclamation point within an equilateral triangle is intended
to alert the users to the presence of important operating and
maintenance (servicing) instructions in the literature accompa-
nying the product. 

The lightning flash with the arrowhead symbol, within an equi-
lateral triangle, is intended to alert the user to the presence of
insulated “dangerous voltage” within the product’s enclosure
that may be of sufficient magnitude to constitute a risk of elec-
tric shock to humans. 

CAUTION:  TO REDUCE THE RISK OF ELECTRIC SHOCK

DO NOT REMOVE COVER. 

NO USER SERVICEABLE PARTS INSIDE. 

REFER SERVICING TO QUALIFIED PERSONNEL.

ATTENTION:  POUR EVITER LES RISQUES DE CHOC

ELECTRIQUE, NE PAS ENLEVER LE COUVERCLE. AUCUN

ENTRETIEN DE PIECES INTERIEURES PAR L’USAGER. CON-

FIER L’ENTRETIEN AU PERSONNEL QUALIFIE. AVIS: POUR

EVITER LES RISQUES D’INCENDIE OU D’ELECTROCUTION,

N’EXPOSEZ PAS CET ARTICLE A LA PLUIE OU 

A L’HUMIDITE.

The IEC fuse symbol pictured at the left represents an approved,
user replaceable fuse. When replacing a fuse, make sure to
replace with only the correct type and fuse rating. 

1. Read Instructions

– Before operating your new JBL LSR product, please read all safety

and operating instructions.

2. Keep these instructions

– For future reference and troubleshooting purposes, retain

these instructions.

3. Heed all warnings

– All warnings in this user manual should be followed.

4. Follow Instructions

– By following instructions presented in this guide, you should be

able to quickly enjoy an accurate and safe monitoring system.

5. Water and Moisture

– Do not use this apparatus near water – for example, bathtub,

sink or in the shower, regardless of how well you sing.

Important Safety Precautions

2

CAUTION

ATTENTION

DO NOT EXPOSE

TO RAIN OR MOISTURE!

NE PAS EXPOSER Á

LA PLUIE NI Á L'HUMIDITÉ!

Содержание LSR25P

Страница 1: ...1 Linear Spatial Reference LSR25P Studio Monitor System Preliminary Owner s Manual ...

Страница 2: ...EN AU PERSONNEL QUALIFIE AVIS POUR EVITER LES RISQUES D INCENDIE OU D ELECTROCUTION N EXPOSEZ PAS CET ARTICLE A LA PLUIE OU A L HUMIDITE The IEC fuse symbol pictured at the left represents an approved user replaceable fuse When replacing a fuse make sure to replace with only the correct type and fuse rating 1 Read Instructions Before operating your new JBL LSR product please read all safety and op...

Страница 3: ...idual countries If you are traveling abroad with your system test the power mains and be aware of any specific voltage requirements before operating your system 9 Options Only use attachments or accessories specified by the manufacturer 10 Non use Periods Unplug this apparatus during lightning storms earthquakes fires floods locusts or when unused for long periods of time 11 Servicing Refer all se...

Страница 4: ...Audio Connections 4 3 2 AC Power Connections 4 3 3 Audio Level Adjustment 5 3 4 High Frequency Adjustments 5 3 5 80 Hz High Pass Filtering 6 3 6 Workstation Boundary Compensation 6 3 7 LED Indication 6 3 8 Mounting 6 4 0 Specifications 8 4 1 System Specifications 8 4 2 Transducer Specifications 9 4 3 Performance Graphs 10 Appendix A Wiring Recommendations 12 4 Table of Contents ...

Страница 5: ...5 ...

Страница 6: ...thin a wide listening window for exceptional performance in a variety of acoustic spaces Attention to these critical aspects results in a rock solid image that remains consistent throughout the entire listening field Linear Dynamics Aperture Contoured ports virtually eliminate high end turbulence found in traditional port designs This provides more accurate low frequency performance at higher outp...

Страница 7: ... and the prime listening position As shown below the distance between the monitors and the distance between each monitor and the center of the listener s head are equivalent Vertical vs Horizontal Placement The LSR25P near field is designed to be positioned vertically This orientation eliminates the phase shifts that occur when the relative distances between the woofer tweeter and the listening po...

Страница 8: ...loops hum If hum occurs see Appendix A for suggested audio signal wiring and system grounding 2 5 Making Sound Happen After connections are made the next step is to power up all equipment before the amplified LSR25P monitors Reduce the level of the monitor outputs of your console or preamp and also turn the volume on the front of the LSR25P monitors fully counter clock wise for minimum gain You ca...

Страница 9: ... shielded 3 1 Audio Connections The LSR25P comes with an XLR and RCA connectors to accommodate a wide range of signal levels and balanced or unbalanced configurations The XLR input is nomi nal 4 dBu sensitivity and the RCA input is 10 dBV Variable user calibration can also be accommodated using the front mounted volume control Positive voltage to Pin 2 of the XLR or the pin of the RCA jack will pr...

Страница 10: ...ded the front channel volume control can be adjusted down The front panel adjust ment gives 9 dB of attenuation in the 12 o clock position 3 4 High Frequency Adjustments A group of four DIP switches are located in a recess on the back of the LSR25P These allow the user to adjust various aspects of the frequency response Switch 3 boosts the high frequency response by 1 5 dB above 2 3 kHz when moved...

Страница 11: ...ed near a wall or other boundary surface 3 7 LED Indication A single Bi Color LED indicator is located on the front of the LSR25P In normal operation this LED will be GREEN At the onset of amplifier clipping in either the low or high frequency amplifier the LED will flash RED Continual RED flashing of this LED indicates that levels should be reduced 3 8 Mounting The LSR25P has built in mounting po...

Страница 12: ...7 Section 3 General Operation ...

Страница 13: ... Input Sensitivity XLR 4 dBu 96 dB 1 m RCA 10 dBV 96 dB 1 m AC Input Voltage 115 230 VAC 50 60 Hz User Selectable AC Input Voltage Operating Range 15 AC Input Connector IEC Long Term Maximum System Power 110 Watts IEC265 5 Self Generated Noise Level 10 dBA SPL 1 m User Controls High Frequency Control 3 kHz 20 kHz 1 5 dB 0 dB 1 5 dB Workstation Boundary Compensation Active or Bypass Low Frequency A...

Страница 14: ... and referenced to 1 meter by the inverse square law The reference measurement microphone position is located perpendicular to the centerline of the low and high frequency transducers at the point 70 mm 2 7 in above the center of the woofer Acoustic loading provided by the listening room increases Maximum SPL capa bilities and Low Frequency Bass Extension as compared to stated anechoic val ues Dis...

Страница 15: ...0 600 500 400 300 200 100 0 100 200 20 20K dB SPL Frequency J o ess o a Amplitude and Phase Hz 100 1000 10000 60 70 80 90 100 20 20K dB SPL Frequency J o ess o a 96 dB 1 m Distortion raised 20 dB Hz 100 1000 10000 60 70 80 90 100 Directivity dB 0 10 20 30 40 20 20K dB SPL Frequency 2nd Harmonic 3rd Harmonic ...

Страница 16: ...11 Section 4 Specifications ...

Страница 17: ...m the AC power connector When using balanced sources with the LSR25P it is recommended to use the XLR input on the LSR25P This maintains a balanced signal and is the best way to reduce the possibility of hum or other interference For balanced sources the HOT signal from your source should be connected to Pin 2 of the XLR input as shown in Diagram A The COLD signal should be con nected to Pin 3 of ...

Страница 18: ...hat high quality twisted pair cable be used when using the XLR input of the LSR25P Diagram D shows an unbalanced source connected to the bal anced XLR input of the LSR monitor using twisted pair cable Note that the shield is con nected to the GROUND SHIELD connector at the LSR input but not at the source This reduces the likelihood of introducing a ground loop into the system Diagram D and E are s...

Страница 19: ...Diagram D Diagram E 14 Appendix A Wiring Recommendations Tip Sleeve Pin 2 Pin 3 Pin 1 LSR XLR Input Unbalanced Source Tip Sleeve Pin 2 Pin 3 Pin 1 LSR XLR Input Unbalanced Source ...

Страница 20: ......

Страница 21: ...JBL Professional 8500 Balboa Boulevard P O Box 2200 Northridge California 91329 U S A www jblpro com A Harman International Company LSR25P MANUAL 98100056 00 CRP 1M 11 99 ...

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