Hey bigaudio!! Glad to see your still modding your altima. Alright now for the sub: it has "2.5" Dual 2 ohms voice coils on aluminum former". I really dont want to spend too much. I want that box that I linked, but the amp I wouldn't want to spend more than 200 tops. Doing this mostly cuz the bass was free haha. Also running factory Infiniti G37 Boss system
cuz its impossible to install an aftermarket unit in that dang thing.
Edit:
Quick copy and paste of its info-
12" Dual 2 ohms HP Series Subwoofer
Power Handling:
Peak: 1000 watts
RMS: 500 watts
Impedance: Dual 2 ohms
Metalized polypropylene cone woofer
NBR (Nitrile Butadiene Rubber) surround
Open Loop motor that utilize a vented hybrid magnet structure which dramatically increases airflow through the speaker
Die-cast aluminum basket
Doesn't require large enclosure volume
Custom designed reversible wrap gasket and protective magnet boot
Heavy gauge wire terminals
2.5" Dual 2 ohms voice coils on aluminum former
Frequency response: 30-2500 Hz
Sensitivity: 87 dB