Originally Posted by JeffKissell
Others have reported several months of battery time with heavy use.
IMHO batteries are more consistent and controllable in your signal chain than phantom... but with that said, it sure is convenient.
99% of the time I run my pre-amp through my Acoustic Image because I use it as a stage monitor and I also find the effects (especially the high pass filter) worth having. So I'm mostly free of worrying about batteries because the AI provides limitless, hassle-free phantom power.
On the few gigs where I don't have my amp, I have a battery ready for my pre-amp, because, yes, depending upon the house's phantom can be dicey.
The Ehrland pre-amp isn't cheap. It should include a phantom option.
I'm still on the fence.