You should not run in 4 channel mode, rather in two channel and split both channels (Y connector) so that the high and bass left are run on one channel, and high and bass right are run on the other. 4 channel mode will sound disgusting.
You do not need to be concerned about feeding the "whole" audio frequency to each individual speaker driver as another poster eludes. That is total hogwash. An amplifier will only amplify the frequencies that the speaker will allow it to amplify i.e. the amplifier connected to the tweeter will only amplify high frequencies, and no bass frequencies at all. Basically the amplifier driving the tweeter will see an infinite resistance in the bass frequencies, which means it will not be doing any amplifying.
I have had wonderful results with doing just that – tops on one amp, bass on another. The improvement is more than subtle and budget amps seem to benefit the most from this arrangement.
Good luck
Paul
You do not need to be concerned about feeding the "whole" audio frequency to each individual speaker driver as another poster eludes. That is total hogwash. An amplifier will only amplify the frequencies that the speaker will allow it to amplify i.e. the amplifier connected to the tweeter will only amplify high frequencies, and no bass frequencies at all. Basically the amplifier driving the tweeter will see an infinite resistance in the bass frequencies, which means it will not be doing any amplifying.
I have had wonderful results with doing just that – tops on one amp, bass on another. The improvement is more than subtle and budget amps seem to benefit the most from this arrangement.
Good luck
Paul