Hi, I need to replace the jack plate on my marshall 1960a cab. I've found the part in various sites, but my jack plate says 300w RMS and under the switch it says 150w/CH. Stereo. The parts I see to order have both those numbers slightly lower(280 and 140, respectively). I wanted to know if that made any difference. I'm using a Vox AC100CPH Classic Plus. I just need to know if I can replace the piece with the lower specs. If not, where could I find the part, besides contacting marshall. ps: not sure if I posted in the right section.