i just bought the SPL at radio shack-- cat 33-2050 and it's on sale for 29.99 (reg 39.99). i'm not sure if they run the same ads nationwide, but i thought i'd let you all know! now i have to figure out how to use it! any tips?? i've spent the last hour reviewing these boards. did i do this correctly? I set the master volume so my left front reads 75db on the meter, then i went around (via the receiver) and adjusted the balance on the other speakers so that i got the same 75db level. i'm using a denon 2802 and it's tones- i know, i know, i should get the calibration disc- but that's what i have for now! is that all there is to it?