Box Build for massive 15" subwoofer (+ demo)

music credit: • FREE BEATS NO COPYRIGH...
SQL box build for a nakamichi 15" NSX subwoofer. rated at 1850 watts rms with a 4" aluminium voice coil.
enclosure is sealed with a VAS of .7 (I think, anyway..) perfect for sound quality, but still gets loud.
sounds super clear and clean in person.
built with minimal basic tools, you don't need a professional shop to build a lot of things.
underpowered with an alpine pdx 1.1000 amplifier, giving the sub just over half its rated power. would definitely come alive with a much bigger amp.