I hope this is the right place to ask these questions. I have a Yamaha RX V3000 receiver. Definitive Technology BP 2004 TL main speakers. These speakers have built in powered subwoofers. Def Tech C/L/R 2002 center speaker. The 2004 speakers are hooked up using speaker level and line level (LFE using Y adapter going into each main) Ok now for the confusion: How should the speaker setting be set? Mains- LARGE or SMALL Subwoofer- SUB or MAIN or BOTH I don't really understand what the BOTH setting does but its there. I have asked these questions in other forums but I never got a clear answer. Maybe someone out there has these same speakers with a Yamaha receiver and they could give there settings. Also the Def Techs are rated at 4-8 ohms, the manual says to use the 4 ohm setting. The confusion here is that some people tell me to use 4 others say to use 8. Does anyone know for sure which is better.