+/-3 db is what I look for in determining a cabs ability in lower end. But that's all it is to me is a spec. A line in the sand if you will. So can anybody tell me just what +/-3 decibles is refering to. I know it is usually written - or +/- 3 db 41hz-16khz for instance. 41hz being the low end ability and 16khz being the high end ability. It appeals to me as a spec because I want to get the best true lowE spectrum I can in a "traditional" cab . I say traditional because I know Acme LowB and other low efficientce cabs can do better but I want to find the best in a traditional efficientce set up that doesn't require a 1000watts of amp as well. So in simplest terms language what is 3db and what makes other than Eden have a cab rated at 41 hz at or below +/-3 dB ?