Audio splitter for headphones can use for speakers?

[JDogg404]

I have 2 logitech z623 and a car sub in my room and i'm using 2 y splitters to make it work and i'm not liking it, i found this.

http/www.ebay.com.au/itm/Alctron-4-Channel-Studio-Headphone-Splitter-Amplifier-1-4-TRS-Outputs/131620783328?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2055119.m1438.l2649

and it looks pretty good but its designed for headphones, what would happen if i plugged 3 of the outputs into my speaker setup. the input would just be aux from laptop.

obviously each set of speakers has their own amp so my guess is that it would be okay, but i would like some opinions

Cheers,

 

[americanaudiophile]

It would not work for you.
It is a headphone amp designed to accept a line level input and amplify it enough to drive 4 pairs of headphones. You don't need headphone amps for powered speakers.
It you are just trying to get everything playing in stereo then the y splitters are not the problem.
The reason you don't like it is may be because you have 2 different subwoofers (2 logitechs + 1 car sub) that are not meant to work together. That can do a lot of nasty things. Doubling the same subwoofer is usually fine. You can get cancellations that reduce some bass frequencies and interactions since the same sound is being reproduced through speakers than sound different.
Running 4 satellites can cause problems too if they are right next to each other. Sometimes less gear but higher quality is better than just more gear.