well,i play my 75' j bass through ampeg b2r and b410hlf and i too wanted a little more bottom end and had my heart set on adding a matching 115 cab.i had been advised to stick with the same sieries so the 15 wouldn't over power the410.well i found one in stock so i drove the 3 1/2 hours to get and i was so convinced that it was the cab i wanted and so sold on ampeg quality that i stupidly droped down my duckits and ran!! well the first thing that i noticed was that i litterly could pick it up and run with it. well i got home and looked at the backs of both cabs a saw that my b410 was made in usa and the 115 was made in china????? well got it hooked all up and tellyou the truth,seeing them all stacked up gave me a little wood!!! first itried the 410 by it's self.sounded great!!! unpluged it and pluged in 115.....d&g strings sounded good.hit the e and cab madenothing but a low distorted buzzing noise.even at very low volume. i'm taking it back,so what do you think? defective or is ampegs quality of thier b-series just garbage now???? please advise!!!! thanks.