Or better, it is possible, but stackcables unlock so many more possibilities out of your setup, it would be a shame not to have a few.
Unfortunately I have to stress the word 'few', as they're very pricey.
I had to take one star away because there are honestly better solutions for splitting signals. Don't get me wrong, the quality is great, but the way Tiptop's Stackcables are designed puts extra stress on your jacks, which could hurt them a bit with time.
It would be ideally better to have splitters that don't connect exactly where the jacks are, but surprisingly there are no modular companies producing them.
Waiting for better, cheaper alternatives you should definitely buy a few of these :)