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of course you can do that…
just go to the strip you want to be the splitted one, select it SEL, touch the Preamp and then just change the input to the same as the channel you want to split..
For example, if you want to split channel 1, which is A 1, go to any other channel strip, and change it to A 1 and you will have a splitted channel without the Y cable…

Hope that i helped..