Inphase car subwoofer & amplifier ?

Inphase IPA1204 & Inphase custom XT subwoofer- both show slight signs of cosmetic damage, that can only be expected with these products as they are placed in the boot. I have the power cable which connects the amplifier to the car battery and i have the cable which connects the amplifier to the subwoofer, for a complete set up you will need to purchase an earth cable to connect the body of the car and a audio cable to connect the system up to your incur stereo. Both can be purchase for under 10 pounds. Amplifier specifications: 2400W 4 channel amplifier MOSFET power supply High level input (speaker level input) Variable gain adjusment Build in high pass / low pass filter Variable bass boost Thermal protection Overload protection High brightness blue LED Subwoofer specifications: In Phase XT12 12″ 1400 watts subwoofer Maximum Power: 1400 Watt Nominal input power: 700 Watt Woofer size: 30cm (12″) Woofer material: Black injected moulded cone Woven-in tinsel leads for high power handling X-MAX 0.39 Inches / 10.0mm Long throw coil Chromed pressed steel chassis Impedance: 4Ω Sensitivity: 87dB Mounting depth: 140mm 125 ono