Hello all Ive tried really hard to understand the concept of LFE and LPF...bt no luck.. So heres my setup Receiver- Onkyo TX-SR707 Front Speakers- Polk Audio RTi A7 Rear Speakers- Yamaha NS 50F Centre- Polk Audio CSi A4 Sub- Polk Audio DSW Pro 600 I did the amp calibration (Audessey) and this is the result Front Speakers- Full Band Centre- 40 Hz Rear Speakers- 40Hz I don think these r optimum settings cos my rear speakers have got really good woofers. Anywys my polk sub has a LPF knob...range is 60- 120Hz and my amp has LFE range frm 80Hz to 120Hz. Now how is the sub LPF setting supposed to match with crossover settings of the speakers and LFE settings. Also shud the LPF on the sub be really low lik 60Hz or at its max. I want maximum bass. I tried reading crossover freqs of my speakers bt dint understand a word.