An open low B string in standard tuning will be at about 30-31 hertz. Tune down and it goes even lower. As I peruse speaker cabinets I see that the vast majority of what is out there has a frequency range of down to ~40 hertz up to whatever (the latter spec is irrelevant). I see lots of 4x10 cabs, 6x10 cabs etc that are only rated to ~40hz and people playing a 5 string through them and can't help but wonder about the compatability there. My question is, what is most common for speakers in a 5 string rig and what is ideal a 5 string rig? Is a 5 string rig normally compromised in the lower frequencies?