Input Panel, Signal Diagram | EAW SB250zR guide

S B 2 5 0 z R S p e c i f i c a t i o n s

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INPUT PANEL

SB250zR

S/N

WHITINSVILLE, MA USA

LIECHTENSTEINLIECHTENSTEIN

PIN 1--...LF1--

PIN 1+...LF1+

PIN 2--...LF2--

PIN 2+...LF2+

NL4 MPR

SIGNAL DIAGRAM

1-Way, Single-Amp (LF1/LF2)
DSP		LF
EQ	AMP
HPF	AMP
LPF		LF
		LF
1-Way, Dual-Amp (LF1, LF2)
DSP	AMP	LF
EQ
HPF
LPF	AMP	LF

LEGEND

DSP: User-supplied Digital Signal Processor.

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

LPF: Low Pass Filter for crossover.

LF/MF/HF: Low Frequency / Mid Frequency / High Frequency.

AMP: User-supplied Power Amplifier.

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

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 Qualification (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-widowed 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. SPLis referenced to other distances using the Inverse Square Law.

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

8.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 defined by International Standard.

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

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

11.Operating Mode: User selectable configurations. Between system elements, a comma (,) = separate amplifier channels; a slash (/) = single amplifier channel. DSP = Digital Signal Processor.

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

12.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.

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

14.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.

15.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.

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

17.Accelerated Life Test: System: Maximum test input voltage applied with an EIA-426B defined spectrum; measured with specified signal processing; Transducer: AES2-1984 R 1997.

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.

GRAPHIC DATA

1.Resolution: To remove insignificant fine 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),

2.83V (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.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 8 above).

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: RD0227 (A) SB250zR April 2005

SB250zR specifications

The EAW SB250zR is a groundbreaking addition to the world of professional audio systems, designed to meet the demands of modern sound reinforcement applications. This high-performance subwoofer is engineered to deliver powerful low-frequency output while maintaining clarity and precision, making it an ideal choice for live events, concerts, and installations.

One of the standout features of the SB250zR is its robust construction. Built with a durable plywood enclosure, this subwoofer is not only lightweight but also able to withstand the rigors of touring and variable environments. The high-quality finish and rugged design ensure that the SB250zR can handle the physical demands of both permanent and portable applications without compromising on sound quality.

At the heart of the SB250zR lies its custom-engineered drivers. The subwoofer is equipped with dual 15-inch woofers, which provide a remarkable power handling capacity and deliver deep, resonant bass. These woofers are designed using advanced materials and construction techniques to achieve a high level of efficiency and minimal distortion, ensuring that low frequencies are reproduced accurately and effectively.

The SB250zR also features an innovative passive radiator design. This technology enhances the acoustic performance by allowing the enclosure to produce deeper bass without the need for additional amplification. The passive radiator adds a level of low-end extension, making it possible for the SB250zR to reach down to the critical sub-bass frequencies that are often lacking in traditional subwoofer designs.

Integration is seamless with the SB250zR due to its versatile connectivity options. The subwoofer is designed to work harmoniously with a range of amplifiers and sound systems, featuring both full-range and low-frequency outputs. This flexibility allows for easy setup and configuration in any audio environment, whether it’s a mobile setup or a permanent installation.

The EAW SB250zR is engineered with the modern audio professional in mind. With its powerful performance, durable build, and advanced technologies, it sets a new standard in subwoofer design. Whether you're looking to enhance a live sound experience or install a reliable low-frequency solution in a fixed venue, the SB250zR provides the performance and quality to meet and exceed expectations.