Yes, if you look at the video mentioned in this thread, we used both.
http://texasfishingforum.com/forums/ubbt...wi#Post12838570I had a splasher and Tim brought the thumper. Normally I am able to limit with the splashier but the interesting thing is that Tim increased or decreased the thumper frequency three times and each time we had a bite within 30 seconds. In the video you can see an instant bite as soon as he changed it. I just finished building mine and will use both in the future. I know some people that use hydro waves on thump frenzy with splashers which creates the same effect.