Sony XS-L124P5B Features:

• 12'' capless subwoofer
  
• 1300W max power output
• 380W rated power output
• Injected Polypropylene Diaphragm
• Magnet back cover
• Gold-plated Binding Posts
• 1-piece Capless cone design offers extreme stiffnes & rigidity
• Impedance (ohms): 4
• Sensitivity (dB/W/m): 89
• Frequency Response (Hz): 18 - 2,000

JA490 Key Features

• 500 Watts 2 Channel Amplifier
• Bridgeable
• High level speaker input
• Pulse Width Modulated (PWM) MOSFET Power Supply
• Variable input sensitivity; RCA input 0.2V to 6V
• Thermal, Overload and Short circuit protection
• Excellent muting circuitry prevents turn on/off pops
• Built-in High Pass / Full Range / Low Pass Filter switch
• Silver plated power connectors for optimum power distribution
• Silver plated speaker connectors for optimum signal output

FREE:

12" Bass Box Features

• Single 12" bass box
• 15mm MDF construction
• Black trimmed carpet
• Internal wiring supplied
• Gold plated terminals
• External Dimensions: W43 x H37 x D23top/33bottom (cm)