GREETINGS bass brethren! The question of the ages: I run a 1x15 cab (a 400rms 8 ohm GKsbx) and I love the lows I get from it. A single 15 does not give me the volume I seek though... and so natural I intend to add more drivers in a second cab. yet.... what configuration will produce the best results?? Here are my thoughts! 2x12: handle more of the lows that i so enjoy.... beefier sounding... but will it bring my volume to wear I want it to be? 4x10: more VOLUME which is the entire purpose of me seeking a second cab... tighter sounding... I use a 500 watt hartke HA5500 for a head, and I have a 2x10 hartke 2.5xl cab which I have decided to sell because a)I do not like the tone b)it cant handle the deep frequencies I desire (I have to cut 30hz out completely) c)It does not push enough AIR, and thus I have this volume crisis. obviously my main concern is whether or not a 2x12 would give me enough of a volume boost (enough MORE than a 2x10 does) Perhaps I should find a 4x10 that can handle decent lows? also note that I have no PARTICULAR bran of cabinet in mind at this time.. but feel free to make suggestions! I might also add that currently I have no band situation, just jam sessions.. So i cannot say what sort of volume I need depending on venue size... But I quest for a rig that will treat me well for years to come no matter where I end up... I turn to my TB brothers and sisters for opinion! (I realize this is a very general and opinionated topic that has been covered before in various forms, but that hasn't stopped you guys before) Thank you!