I read in a magazine that ideally sound in a multichannel format should reach a listeners ears simultaniously and delays to speakers should be set accordingly so in a set up where Front speakers are 2m in front and rear in line with listener but 1m either side of them, then you set a delay parameter that delays the rears to allow for the difference between the distance to thefronts and the distance to the rears. using this that means no delays would be the case where the rears are the same distance from the listener as the fronts The equation provided was that 1millisecond for each 30cm so in the above example rear delay should be approx 3mS. I have a marantz where I put in speaker distances and assume that entering 1m for each of the rears and 2m for the fronts effectively does this (ie puts a delay on the rears of 3mS) I want to add a rear centre but the speaker will be immediately above my head. So if I set the amp so that distance to speakers is: Front L/R:2m Rear L/R :1m Rear Centre:0m Then delays will be Front L/R:0 Rear L/R :3ms Rear Centre:6ms But my understanding is that the Rear centre is to enhance rear panning and provide greater flyover effects. WOuld it not make it better to delay the sound on the rear centre so that it reaches the ear slightly after Rear L/R as if the speaker were further back so that flyovers sound further back and panning sounds like the speakers are in arc around the listener rather than a straight line. So a possible set up would be: Front L/R:2.3m Rear L/R :1.3m Rear Centre:0m Then delays will be Front L/R:0 Rear L/R :3ms Rear Centre:7ms (effectively 1ms after rear L/R) I am at the hypothetical stage as I have yet to buy a speaker but wont take the plunge until I know what parameters I have to play with (dont want to spend £200 and find that because the speaker is above my head the sound is effectively fired forward and the enhanced panning from F to B and L to R isnt audible because of the speakers proximity). Just wondering if my logic is flawed or not?