I just want some pointer from anyone who uses a SPL meter to set the level of their subwoofer. My mains, centre and surrounds have been set to give 75 dB with a test tone (SPL meter set to Slow, C-weighting). I am now running a test tone into the sub. Theoretically, should that level be set so the SPL gives the same reading as with the rest of the speakers (ie 75 dB) ? When I do so, the sub still sounds damn quiet, even for film scenes which are well-known for thir LFE's....unless I turn the sub up, but then I'm not sure if it's turned up too much and it's delivering extra base which the film director doesn't intend the audience to feel. Any advice about the theoretical level setting dfor subwoofers using a test tone? Thanks in advance.