My Hartke XL115 is rattling and farting in lo B and E now. I pulled the speaker out and can't seem to see anything loose, cracked, or noisy when pushing in and out. The cab is 2 1/2 yrs old and I'm wondering if it is worth getting a better 15" or staying with the O.R. I guess that would depend on cost. I currently use another Hartke XL410 with a Carvin 1500 amp & Ampeg SVP-Pre. any thoughts??