So, my 3 piece band is finally getting gig ready but my amp isn't up to the job. It's a 50 watt crate and I don't really use it for rehersals as we don't have a drummer. I have access to my guitarist's 400 watt trace elliot bass head but his cab is a 4 x 12 monster. I'm looking at a diy cab with either an eminence delta 12a or delta 12lfa. Could anyone tell me which one would would suit double bass better?