Hi! While running the Avia LFE frequency sweep I'm noticing this: 100 Hz - volume start to increase until it reaches 76 Hz. 76.47 Hz - reach a peak and then start to go down until it reaches 51 Hz. 51.83 Hz - at this point volume is barely noticeable and starts to go up again until it reach 48 Hz. 48 Hz - another peak but here volume goes off the chart and start to go down again. 41.26 Hz - at this point the volume has gone down but I can still hear it and stays in level until it reaches 30 Hz. 30 Hz - I can not hear anything from here on, the sub goes totally silent. I carefully touch the speaker with one finger and the woofer is still vibrating even when the sweep is at 20 Hz. As you can see what I'm getting is like a wobbling sound that goes up and down I will like a more continuous sound. Also the sub is supposed to go down to 25 Hz but at 30 it goes silent. How can I accomplish this? and how can I make the sub to extend down to 25hz. The Avia DVD doesn't stop at each frequency, so measuring the exact SPL at a given frequency is difficult. Is there a DVD or CD that plays a LFE frequency sweep but allows you to control the steps in frequency so you can measure the SPLs? My subwoofer is an SVS 25-31PC and my receiver is a Yamaha RX-V3000. My room is very small (14 wide, 11.5 long). The sub is placed on the right front corner. Before running the sweep test I calibrate the SPL level and phase using Avia, both things seems to be ok. Thanks for your help!!!