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The Panasonic CJ-SW2503 is a car subwoofer.

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Pros

better dampening than its predecessor - has a wider rubber edge

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lots of value - similar 12" subs cost significantly more

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designed for high power systems - uses heat resistant wiring

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built with quality components

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low distortion even at higher volumes

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Cons

aging product - released in 2009

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manufacturer warranty - only 1 year

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The Panasonic CJ-SW2503 is a car subwoofer. 1.5 times the size of the edge on Panasonic's previous models, this wide rubber edge performs the task of linking the cone to the frame. It has 4-Layer Voice Coil for High Power Handling with a maximum rate input of 1400 W. It comes with a large Dual Damper Suspension System which results in a controlled yet powerful bass sound. Another feature is Screw Type Terminals,  these large terminals assure high signal transmission efficiency while resisting corrosion.

Features
  • Size: 12"
  • Peak Input Power: 1400W
  • Frequency Range: 18Hz - 3kHz (-10dB)
  • Sensitivity (S.P.L., dB/W/m): 89
  • Nominal Impedance: 4 ohms
  • Magnet Weight: 45 oz
  • Mounting Depth: 5.492"
  • Mounting Location: trunk
  • Wide Rubber Edge: Yes
  • Cone Material: High rigidity mica/polypropylene composite oven cone and center cap
  • 4-layer Voice Coil: Yes
  • Large Dual Dampers: Yes
  • Diaphragm with Large Center Cap: Yes
  • Screw-type Terminals: Yes, gold-plated
  • High Power Handling with minimum distortion: Yes
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