hi ,my factory speakers blew out when i replaced my factory radio with a pioneer z2 in my 02 yukon.i replaced the speakers with pioneer ts-a1672r and they sound clear but no bass. what kind of amp and subwoofer what be good for these speakers. i want to keep everything made by pioneer, i dont want to blow these speakers so i dont need super bass and power, just a good clean sound and not too expensive. any input would help. thanks