I have just purchased this 2nd hand. R-925RDS. With ref: connections, there is a pre out stage. the manual says "when you do not use the front main in and pre out jacks, always connect these jacks with the links supplied" I have no links? I aim to use just this amp and hence all 5 of its power outputs. Do I need to short these links? The only preout I may use is the sub as I have a rel q100e. Any help/advice will be greatly appreciated. Regards Sprout PS any advice on this amp on choice of optical or coax being best to couple to my Pioneer 717 would be useful.