Going on the advice of "How to Get Better Sound", I placed my TT platform on the side wall about 3 feet from my left speaker. Because my sound room is on the second floor and I have a suspended floor, I built a suspended platform, out from my wall using appliance springs and tie-down straps/metal cables, so it basically "floats." This worked great, until I added another JL Fathom 13 sub. I couldn’t even turn the subs on, due to low frequency feedback that would build on itself. I tried the inner tube trick, the sandbox trick-everything I could think of to no avail. I finally moved my turntables to between the speakers. I’m sure, some of you are thinking-what a moron-everyone knows that and I would agree. It took me several trial and error positions, to find this place, where no room nodes are effecting the playback. I think in the long run, acoustical energy has a huge effect, on the playback, specially at high volume levels. As far as cones go, I was a skeptic. I have a Theta Miles CD player I dearly love and only use analog outs on it. I had to utilize thick foam, so the low frequency would not effect the playback. (too much low frequency for the room size) I placed four cones, one under each corner of the CD player and was amazed to not have anymore low frequency pick-up. Maybe I will try just three cones in the future. I know you said you can’t move your equipment, but as mentioned above, sometimes just a little change, can have a huge effect on your sound. Room nodes can be neutralized some, with room treatment. As a matter of fact, I think proper room treatment, used in the proper way, will give most of us better sound, than an equipment upgrade. I’m a believer in Dennis Foley’s technique and products. If you haven’t tried them, or are not familiar with them, go to his web sight "Acoustic sounds."
