my friend gave me a small amp not alot of power but is was free. its a mtx 4122 2 channel amp. with 60rms w x 2 at 2ohm , 30w rms x2 at 4 ohm , and 120rms w bridged at 4 ohm. with a power of 12.5 vdc. What 12' sub would you recommend. and how should i wire it. i need a 1 twelve because i already have a enclosed box. at about $100 budget.