hi all, i just finished installing a Alpine MRP-F320 amp, running the stock headunit. the amp is powering all mids and JL 6W3v3-4. but for some reason it doesnt seem like it has enough power to power the JL. i put back the oem sub and it powers it but im afraid to move the volume past 15. as the specs on the amp and JL sub, it seems the amp should be able to power it no?