Generally no. But are you talking about computer gear or normal home theater or music gear?
Here is the concepts: speakers are MOTORS. You use an amplifier to convert audio information to signals powerful enough to drive speakers.
If you just add more speakers, you have added more motors to the same power so all the speakers REDUCE in volume.
This is for normal home gear.
Computer speakers are a bit different. Each set of speakers come with their own tiny amplifier built in. You can "split" the signal to feed multiple self-powered computer speakers to increase the volume. I am not promising it will sound good but it will work.
