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4.375
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The JL Audio 12W7 is a 12" audio subwoofer, in the W7 product series.

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Pros

powerful hits on the beat that you can feel

2 agree

good representation of the full bass range, doesn't drop off anywhere

1 agrees

can run it on a weaker amplifier and still get powerful sound from it

1 agrees

has a natural sound to it, doesn't get overly "thumpy"

1 agrees

works for years even when used regularly

1 agrees

capable of extremely loud audio output

1 agrees
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Cons

need to make a custom ported box for it

1 agrees
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Edit

 

The JL Audio 12W7 is a 12" audio subwoofer, in the W7 product series. This series provides models in 8, 10, 12 and 13 inches. The core design is consistent across the product line. The first number represents the size in inches for the surface area of the speaker. The 12W7 offers a free air resonance of 27.2 Hz and a thermal power handling of 1,000 W. Operation over 1,000 watts is not recommended for this model and voids the warranty. To go up to 1,500 Watts, look at the 13W7 model. If you are looking for less power, look at the 10W7 model, which has an upper limit of 750 Watts. A detailed product manual is included with the subwoofer, along with a visual installation guide.  Online tutorials provide step by step instructions on the wiring and installation of the subwoofer.

Features
  • Free Air Resonance is 27.2 Hz
  • Electrical Q is 0.514 Qms
  • Mechanical Q is 7.807 Qms
  • Total Speaker Q is 0.482 Qts
  • Equivalent Compliance is 2.33 cu.ft or 66.0 liters
  • On-Way, Linear Excursion is 1.15 inches or 29 mm
  • Reference Efficiency is 0.249%
  • Efficiency at 1W/1M is 86.2 dB SPL
  • Normal Impedance is 3 ohm
  • Thermal Power Handling is 1,000 W
  • Net Weight is 45 lbs or 20.4 kg
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