Eaw JFL210 Manuel d'utilisateur télécharger pdf (Page 6)

Eastern Acoustic Works • One Main Street • Whitinsville, MA 01588 • tel 800 992 5013 / 508 234 6158 • fax 508 234 8251 • www.eaw.com

EAW products are continually improved. All specifications are therefore subject to change without notice. Part Number: RD0480 (A) JFL210 September 2008

JFL210 Speci f i cations

group · J

NOTES

TABULAR DATA

1. Measurement/Data Processing Systems: Primary - FChart: proprietary EAW software; Secondary - Brüel & Kjær 2012.

2. Microphone Systems: Earthworks M30; Brüel & Kjær 4133

3. Measurements: Dual channel FFT; length: 32 768 samples; sample rate: 48 kHz; logarithmic sine wave sweep.

4. Measurement System Qualication (includes all uncertainties): SPL: accuracy +/-0.2 dB @ 1 kHz, precision +/-0.5 dB 20 Hz to 20 kHz, resolution 0.05 dB; Frequency: accuracy +/-1 %, precision +/-0.1

Hz, resolution the larger of 1.5 Hz or 1/48 octave; Time: accuracy +/-10.4 μs, precision +/-0.5 μs, resolution 10.4 μs; Angular: accuracy +/-1°, precision +/-0.5°, resolution 0.5°.

5. Environment: Measurements time-windowed and processed to eliminate room effects, approximating an anechoic environment. Data processed as anechoic or fractional space, as noted.

6. Measurement Distance: 7.46 m. Acoustic responses represent complex summation of the subsystems at 20 m. SPL is referenced to other distances using the Inverse Square Law.

7. Enclosure Orientation: For beamwidth and polar specications, as shown in Mechanical Specication drawing.

8. Volts: Measured rms value of the test signal.

9. Watts: Per audio industry practice, “loudspeaker watts” are calculated as voltage squared divided by rated nominal impedance. Thus, these are not True Watt units of energy as dened

by International Standard.

10. SPL: (Sound Pressure Level) Equivalent to the average level of a signal referenced to 0 dB SPL = 20 microPascals.

11. Subsystem: This lists the transducer(s) and their acoustic loading for each passband. Sub = Subwoofer, LF = Low Frequency, MF = Mid Frequency, HF = High Frequency.

12. Operating Mode: User selectable congurations. Between system elements, a comma (,) = separate amplier channels; a slash (/) = single amplier channel. DSP = Digital Signal Processor.

IMPORTANT: To achieve the specied performance, the listed external signal processing must be used with EAW-provided settings.

13. Operating Range: Range where the processed Frequency Response stays within -10 dB SPL of the power averaged SPL within this range; measured on the geometric axis. Narrow band

dips are excepted.

14. Nominal Beamwidth: Design angle for the -6 dB SPL points, referenced to 0 dB SPL as the highest level.

15. Axial Sensitivity: Power averaged SPL over the Operating Range with an input voltage that would produce 1 W at the nominal impedance; measured with no external processing on

the geometric axis, referenced to 1 m.

16. Nominal Impedance: Selected 4, 8, or 16 ohm resistance such that the minimum impedance point is no more than 20% below this resistance over the Operating Range.

17. Accelerated Life Test: Maximum test input voltage applied with an EIA-426B dened spectrum; measured with recommended signal processing and Recommended Protection Filter.

18. Calculated Axial Output Limit: Highest average and peak SPLs possible during the Accelerated Life Test. The Peak SPL represents the 2:1 (6 dB) crest factor of the Life Test signal.

19. High Pass Filter: This helps protect the loudspeaker from excessive input signal levels at frequencies below the Operating Range.

GRAPHIC DATA

1. Resolution: To remove insignicant ne details, 1/12 octave cepstral smoothing was applied to acoustic frequency responses and 1/3 octave cepstral smoothing was applied to the beamwidth and

impedance data. Other graphs are plotted using raw data.

2. Frequency Responses: Variation in acoustic output level with frequency for a constant input signal. Processed: normalized to 0 dB SPL. Unprocessed inputs: 2 V (4 ohm nominal impedance), 2.83 V (8

ohm nominal impedance), or 4 V (16 ohm nominal impedance) referenced to a distance of 1 m.

3. Processor Response: The variation in output level with frequency for a constant input signal of 0.775 V = 0 dB reference.

4. Beamwidth: Average angle for each 1/3 octave frequency band where, starting from the rear of the loudspeaker, the output rst reaches -6 dB SPL referenced to 0 dB SPL as the highest level. This method

means the output may drop below -6 dB SPL within the beamwidth angle.

5. Impedance: Variation in impedance magnitude, in ohms, with frequency without regard to voltage/current phase. This means the impedance values may not be used to calculate True Watts (see 9 above).

6. Polar Data: Horizontal and vertical polar responses for each 1/3 octave frequency band 100 Hz to 16 kHz or Operating Range.

INPUT PANEL SIGNAL DIAGRAM

LEGEND

DSP: User-supplied Digital Signal Processor.

HPF: High Pass Filter for crossover or Recommended High Pass Filter.

LPF: Low Pass Filter for crossover.

LF/HF: Low Frequency / High Frequency.

AMP: User-supplied Power Amplifier.

XVR: Passive LPFs, HPFs, and EQ integral to the loudspeaker.

AMP

2-Way, Single-Amp (LF/HF)

XVR

HPF

DSP

DELAY

HPF/LPF

AMP

2-Way, Bi-Amp (LF, HF)

AMP

JFL 210 = 24 KG / 5 2 LB

JFL 210 RIGG ING WOR KING LO AD LIMIT (WLL) : SIX (6)

JFL 210 IN S UCCES SION. 14 4 KG / 312 LB

FAILURE TO FOLLOW MANUFACTURER’S

INSTRUCTIONS CAN RESULT

IN DAMAGE, INJURY, OR DEATH.

BI-AMP

S IN G L E-AMP

PIN 1

PIN 2

PIN 1 LF

PIN 1

PIN 2 HF

PIN 2

BI-AMP

S IN G L E-AMP

PIN 1

PIN 2

PIN 1 LF

PIN 1

PIN 2 HF

PIN 2

SINGLE-AMP

BI-AMP

800W @ 8

LF: 800W @ 8

HF: 150W @ 8

HF SHADING

MULTI BOX

SINGLE BOX

LONG THROW

BI-AMP

SINGLE-AMP

OPERATING MODE

1 2 3 4 5 6

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Eaw JFL210 Manuel d'utilisateur Page 6

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