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  Peerless Data Sheet

SWR 269
269 SWR 51 147 NX ALP 4L XLS 8/5 ohm    -    Order ID: 830452

By introducing the new range of Xtra Long Stroke (XLS) subwoofers, Peerless has pushed the performance limits for subwoofers. The XLS/subwoofer range will fulfil every demand for deep clean bass reproduction like active THX home theatre and Dolby Digital subwoofer applications.In the design the emphasis has been put in achieving extreme deep bass, long time reliability, high power handling, and very low distortion - also under very large sound pressures. The 10" XLS is available in several different configurations from small passive radiator assisted subwoofers to classical and car applications.


SWR 269
Thiele Small parameters: Free air Common Baffled
Nominal impedance Zn (ohm)   8  
Minimum impedance/at freq. Zmin (ohm/Hz)   4.9/115  
Maximum impedance Zo (ohm)   53.3  
DC resistance Re (ohm)   3.4  
Voice coil inductance Le (mH)   4.3  
Capacitor in series with 8 ohm
(for impedance compensation)
Cc (F)   22  
Resonance Frequency fs (Hz) 18.9   18.9
Mechanical Q factor Qms 2.63   2.63
Electrical Q factor Qes 0.18   0.18
Total Q factor Qts 0.17   0.17
F (Ratio fs/Qts) F (Hz)     112
Mechanical resistance Rms (Kg/s)   6.12  
Moving mass Mms (g) 135.3   135.4
Suspension compliance Cms (mm/N)   0.52  
Effective cone diameter D (cm)   21.2  
Effective piston area Sd (cm)   352  
Equivalent volume VAS (ltrs)   89.7  
Force factor Bl (N/A)   17.5  
Reference voltage sensitivity
Re 2.83V 1m at 115 Hz (Measured)
(dB)     88.4

Magnet and voice coil parameters:
Voice coil diameter d (mm) 51
Voice coil length h (mm) 33
Voice coil layers n 4
Flux density in gap B (T) 1.04
Total useful flux (mWb) 2.50
Height of the gap hg (mm) 8
Diameter of magnet dm (mm) 147
Height of magnet hm (mm) 35
Weight of magnet (kg) 2.42

Measuring methods and conditions are stated in Peerless Standard for Acoustic Measurements (PSAM)