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| HS251 - DUAL VOICE 10" SUBWOOFER SPEAKER | 
| SPEAKER MODEL | HS251 | 
| SPECIFICATIONS | |
| Nominal Basket Diameter | 
        10" | 
| Impedance | 8 + 8 ohms | 
| AES Power Rating | 200 + 200 Watts | 
| Program Power | 400 + 400 Watts | 
| Frequency Response | 25Hz - 600Hz | 
| Sensitivity (1W/1m) | 89dB SPL | 
| Voice Coil Diameter | 2" / 50mm | 
| Voice Coil Length | .94" / 24mm | 
| Magnetic Gap Height | 3.1" / 8mm | 
| MOUNTING INFORMATION | |
| Overall Diameter | 10.53" / 267.5mm | 
| Bolt Circle Diameter | 9.96" / 253mm | 
| Baffle Cutout Diameter | 9.25" / 235mm | 
| Depth | 5" / 127mm | 
| No. Of Mounting Holes | 8 | 
| Mounting Hole Diameter | .2" / 5mm | 
| Flange Thickness | .2" / 5mm | 
| Net Weight | 9.25 lbs./ 4.2 kg. | 
| MATERIALS | |
| Basket | Cast Aluminum | 
| Cone | Treated Cellulose | 
| Surround | Rubber | 
| Surround Shape | Half Roll | 
| Former | Kapton | 
| Magnet | Ferrite | 
|  
          THIELE-SMALL 
        PARAMETERS | |
| Resonant Frequency (fs) | 30 Hz | 
| Impedance
        (Re) | 5.8 + 5.8 ohms | 
| Electrical Factor(Qes) | .43 | 
| Mechanical Q (Qms) | 7.21 | 
| Total Q (Qts) | .4 | 
| Compliance Equiv. Vol. (Vas) | 63.2 Liters/2.23 cu. ft. | 
| Voice Coil Overhang (Xmax) | 10.0mm | 
| BL Factor | 19.91 T-M | 
| Diaphragm Mass (Mms) | 79.13 grams | 
| Surface Area of Cone (Sd)m2 | 0.0346m2 | 
| Reference Efficiency (%) | .36% | 
| Coil Inductance (Le) | 4.03mH | 
| FREQUENCY RESPONSE | |
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| DIMENSIONAL DRAWING | |
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US Speaker, LLC