User manual JBL LC-A304

[. . . ] Subwoofer installation often requires woodworking skills and some experience disassembling and reassembling automotive interiors. If you lack the necessary tools or know-how, have your subwoofer installed by an authorized JBL dealer. You should choose an enclosure based on the type of music you listen to, how much amplifier power you will use for the subwoofer, and how much space inside the vehicle you can devote to a subwoofer enclosure. Because a sealed enclosure provides the most control over woofer movement, a woofer mounted in a sealed enclosure will handle more power than a woofer mounted in another enclosure type. [. . . ] Because a sealed enclosure provides the most control over woofer movement, a woofer mounted in a sealed enclosure will handle more power than a woofer mounted in another enclosure type. Sealed enclosures also provide more accurate sonic reproduction than other enclosure types so they are well suited to all types of music. Sealed-enclosure construction is straightforward, and there are many prefabricated sealed enclosures available. An optimum sealed enclosure is always smaller than other types of enclosures optimized for a particular speaker, so it requires the least amount of space inside the vehicle. Vented enclosures provide better efficiency in the 40Hz­50Hz range, but this efficiency comes at the expense of sound in the lowest octave (below 40Hz) and at the expense of some control and power handling. If you are using a small amplifier, a vented box will provide more bass output from less power. Vented enclosures are also well suited to a variety of music types. JBL accepts no liability for hearing loss, bodily injury or property damage resulting from use or misuse of this product. S u b w o o f e r LC-S800w 12­100W 89dB 47Hz­2kHz 4-1/8" (105mm) 7" (178mm) 9" (229mm) 10-3/4" (273mm) 4-1/2" (114mm) 5" (127mm) 40Hz­800Hz 40Hz­500Hz 90dB 91dB 12­150W 12­200W LC-S1000w LC-S1200w Specifications Recommended Amplifier Power Range Sensitivity Frequency Response Mounting Depth Cut-out Diameter Thiele and Small Parameters 4 Ohms 3. 47 Ohms 33. 27Hz 32. 67 Liters 4. 67 0. 38 0. 33 48. 6g 2. 1mH 2. 0mH 2. 2mH 75. 0g 109. 2g 0. 32 0. 33 0. 34 0. 37 4. 39 3. 18 71 Liters 124 Liters 28. 5Hz 27. 4Hz 3. 52 Ohms 3. 45 Ohms 4 Ohms 4 Ohms Nominal Impedance Revc Fs Vas Qms Qes Qts Mms Levc Sealed-Enclosure Specifications 1 cu. (35. 88 Liters) Enclosure Volume . 4 cu. (11. 32 Liters) Vented-Enclosure Specifications 1. 5 cu. (42. 46 Liters) 3" (76. 2mm) 7" (177. 8mm) 1. 75 cu. (49. 54 Liters) 4" (101. 6mm) 10-3/4" (273mm) 3" (76. 2mm) 10" (254mm) Enclosure Volume . 6 cu. (19. 96 Liters) Port Diameter Port Length Bandpass-Enclosure Specifications 1 cu. (19. 82 Liters) 4" (101. 6mm) 8" (203. 2mm) 1. 25 cu. [. . . ] (49. 54 Liters) 4" (101. 6mm) 10-3/4" (273mm) 3" (76. 2mm) 10" (254mm) Enclosure Volume . 6 cu. (19. 96 Liters) Port Diameter Port Length Bandpass-Enclosure Specifications 1 cu. (19. 82 Liters) 4" (101. 6mm) 8" (203. 2mm) 1. 25 cu. [. . . ]