I know I have asked this before so you guys will just have to bat me down with a large stick. But I just can t quite get to grips with this ohms and amps malarkey. Right, I have a Arcam 100Watt (into 8-Ohms) P-25 Power-amp that looks after my front three S-85's 4-Ohm speakers. The manual only really talks about 8-Ohms and 4-Ohms into two channels so doesn't really help. However, I notice the below 8-Ohm load - 100 Watts 4-Ohm load - 170 Watts So, with my tiny brain, the above suggests that the 4-Ohm load will give you more power....but I know that this cannot be correct....... So, experts and all, why are 4-Ohms rated at 170 Watts but they don't produce/sound like 170 Watts? If someone could write a 'idiots guide' to explain to me what this means (in respect to Ohms, power and speakers) I would be grateful.....very grateful indeed. Also, just how much strain is this going to place on my P-25?