Several issues ago in Stereophile Guide to Home Theater there was a positive review of the Subwoofer Optimizer System. This, according to the manufacturer and the reviewer, acts to 'attenuate an audio system's major room mode resonance to provide significant improvement in measured and subjective bass performance.' It cost $300 and fits between your receiver or pre/pro and your subwoofer amp. Does anyone have this, and if so, how do you like it? It sounds like a worthwhile addition to me, concidering the less than ideal situations in most home theaters. Thanks. Fred.