I currently run a hartke 410TP cabinet through a Hartke 3500 head. I am constantly being drowned out by the guitarists in my band. I want to know if I should add another 410TP (8ohm), or just run one 4200 cabinet(4ohm). My head rates something like 240 at 8ohms and 350W at 4ohms. I am not very knowledgeable when it comes to this aspect of bass playing. A sound guy told me that I would get more power and sound adding another 8ohm cabinet and that it would actually drop my ohms down to 4 with two 8ohm cabinets. Someone from Hartke told me to go with the 4ohm cabinet and that adding another 8ohm cabinet would just be a tonal change not volume. I don't really have any idea. I need advice.