Sorry folks but I've looked and looked. The title says it all really. My B string sounds just fine through my headphones; nice really, like the E string but lower. Actually, the same applies when playing not plugged in at all. Once I'm playing through my rig the B string notes are not as defined. They are better at higher volumes than the low volumes I use messing about at home but still not as nice as through my headphones. To describe what I hear, it is almost to say I hear the multiple harmonics as clearly as any fundamental and that is quite different to what I hear when I play my A string. My A string just sounds like a single powerful note/frequency. I play through an EA Doubler with a Wizzy 10 stacked on a Wizzy M-Line (which is a 12" speaker) and EA say both my cabinets are very suitable for 5 strings and I am very happy with the rig, but I would love my B to sound as defined as my E and A strings. So if my speakers fail to produce much below 45hz (which is their minimum rating) is that a "natural" equivalent to a HPF? If I were to use a HPF set to 45hz would the rig respond any differently and would my B string be clearer? Would it be better to tune a HPF to just under 60hz to get the first (and subsequent) harmonics of the B string and add a bit of bass at the amplifier? Would that also improve my E string if the cabs aren't full generating the 40hz fundamental of E? To add to my confusion I have watched a few YouTubes where the B string sound reproduced with a HPF applied sounds worse to me than the intial take without HPF (and I don't want to spend $300 Aussie to find out a pedal would do the same). I have seen a few threads where the OP is confused by all this and yet seems to have done a bit of reading just like me so I am at your mercy. Plus, I'm sure there are others wondering the same... Ta!