I currently have a JL J2-1000.1 and I was wondering if it was strong enough to properly and adequately push 2 JL 13TW5 shallow mount subwoofers . I went to a local audio shop and told the guy I had this amp and was going to use it to power these 2 subs.. He told me I would be greatly underpowering them... I just want a second opinion... Please let me know. Thanks!