Contour Enthusiasts Group Archives Forums Modifications Audio what is better to power four speakers?

to achieve the greatest channel separation what is best to use:
1) one four channel amp
2) two two channel amps
3) four one channel amps
4) two four channel amps bridged
5) four two channel amps bridged

remember all other issues like expense, space, setup time are considered unimportant

the issue here is channel separation not power output or impedance load ability.