Hi, I'm pretty new at using pedals. I'm interested in trying out the bass synth wah from digitech. I read that it can drain out batteries quite fast. I read some bad reviews about the digitech power supply for these pedals. I might end up buying the x-seires chorus pedal as well so I'll be needing a power supply that can power up to 4 pedals. (I also use a BBE opto compressor.) Any suggestions? Nothing too expensive pls. Thanks!