JL Audio Subwoofe User's Manual
Contents
1. Subwoofer Specifications 8W1 4 8W1 8 Fs free air resonance 33 2 Hz 35 7 Hz Qts total speaker Q 0 345 0 385 Qes electrical Q 0 355 0 414 Qms mechanical Q 11 5 6 247 Vas equivalent compliance 0 90 ft 25 5 liters 0 78 f 22 1 liters Xmax linear excursion one way 0 282 in 7 2 mm 0 282 in 7 2 mm Efficiency 1W 1m 86 0 dB 85 6 dB Sd effective piston surface area 30 7 _in 0 0198 m 30 7 _in 0 0198 m Re DC resistance 3 34 Q 6 89 Q Znom nominal impedance 4Q 8Q Pt continuous thermal power handling 100 Watts 100 Watts Efficiency 1W 1m is not an accurate indicator of a subwoofers output capability and should not be used as a comparison to other subwoofers to determine which one is louder Physical Dimensions Frame Diameter A Mounting Hole Diameter B Mounting Depth C Overall Depth D Magnet Diameter E Displacement Be sure to allow 0 75 inches 19mm for pole vent clearance on this driver Normal Recommended Enclosures single driver Model 8W1 4 8W1 8 Volume Net Int width X height X depth Volume Net Int width X height X depth Sealed 0 30 ft 16 x 9 x 6 75 0 30 ft 16 x 9 x 6 75 Enclosure 8 51 406mm x 229mm x 171mm 8 51 406mm x 229mm x 171mm Ported 0 75 ft 15 x9 x 15 5 0 75 ft 15 x9 x 15 5 Enclosure 21 21 381mm x 229mm2. g high quality satellite speakers like our Evolution line of coaxial and component speakers We do not recommend the use of passive crossover components coils on subwoofers These components may adversely affect the performance of a subwoofer When dealing with exceedingly long port lengths we recommend the use of JL Audio s Flex Port System The Flex Port tubing is flexible allowing it to fit in otherwise tight locations The Port mouths provide not only a convenient method of securing the port but a smooth rounded edge for the port termination as well
3. x 394mm 21 21 381mm x 229mm x 394mm Port 2 5 X 12 4 2 5 X 11 7 inside dia X length 64mm X 318mm 64mm X 297mm K H Sealed Enclosure Ported Enclosure Enclosure dimensions listed are external dimensions which assume the use of 0 75 inch 19mm thick material If you are using 0 625 inch 16mm thick material subtract 0 25 inches 6 5mm from each dimension Do not use material with a thickness of less than 0 625 inches 16mm Enclosure volumes listed are NET internal volumes Driver displacement port displacement and brace displacement must be added to obtain the final gross volume The dimensions listed have already taken this into account eWhen using two subwoofers in a common enclosure simply double the required volumes and use two of the recommended ports when needed Likewise when using three subwoofers in a common enclosure simply triple the required volume and number of ports when needed Wired directly to the amplifier A single 4Q speaker will present a 4Q load A single 8Q speaker will present a 8Q load With speakers wired in parallel Two 4Q speakers will present a 2Q load Two 8Q speakers will present a 4Q load With speakers wired in parallel Three 4Q speakers will present a 1 3 load Three 8Q speakers will present a 2 7Q load Do NOT use different impedance speakers when using multiple subwoofers JL Audio recommends using subwoofers as part of a bi amplified system usin
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