Install it yourself, it's not that hard. And for $500, you can do WAY better than a Basslink. Check out subs from Infinity, Image Dynamics, Elemental Designs, Resonant Engineering, JL, Diamond Audio, Adire, Kicker, etc... You can find good amps from JL, Kicker, Elemental Designs, Hifonics, JBL, Diamond Audio, Xtant, etc...