I'm very impressed with this module and the library is great. I've tried it with a TDA7297 10-50W Dual-Channel Power Amplifier Module and the sound is great. I'd like to connect 2 of the WTV020's to the amp since it is stereo so I can play music on one and sound effects on the other at the same time, however there is only one gnd input and 2 + inputs. Is it safe to connect the speaker - from 2 WTV020's to the same gnd in on the amp? I had earlier tried connecting 2 WTV020's to the same speaker and ended up frying both, don't want to sacrifice any more.