Some of the british integrated amps have preamp outputs specifically designed for biamping. These are different from the style of integrateds where they have the jumper bars from the pre to power amp section and once you pull the jumpers you lose the power amp portion. If you do not already own these pre-amp and amps I would look into the int. amp to see if it has the pre-out and buy just the int. and power amp. If you own all three and the int. does not have a seperate preamp input I would use any of the regular inputs and turn the volume control on the int. up and let the preamp control the volume. It should work out well.