Did a couple searches and couldnt quite find an answer. I've got a euro spector ns2 with the EMG P/J and Tone Pump configuration. I like the sound I get, but I feel that I need a little more low/low-mid to fill and cut through in my band mix better. I'm considering swapping out the tone pump preamp, but can't decide on what to go with. I was originally thinking the Aguilar obp-3, but am considering one of the nice EMG 3 band ones. Which would compliment the pickups and all maple body best for some solid low end growl. I play in a funk/rock type group, and do a fair amount of slapping. Any suggestions on either of those two preamps, or perhaps another? I'd also like the ability to go into passive if the battery(ies) dies at an inconvenient time.