Solo / preview Buss Setup

Is there any way I can set Nuendo up so that I can hear the preview (speaker tool) when everything is soloed?

I use it as a multiple out system but when I solo something the speaker tool stoops working, seems like a strange idea to have this especially when I set up, say. 4 tracks out of maybe 50 or more to be in solo, then I need to un - solo everything to hear the preview and then find the tracks I want to solo again, very time consuming!