One of the effects of switching to usb is that I now have a 4 channel (well
really 6 channel) with two preamps so I started looking around for battery
powered preamps. So far the best option looks to be these
http://www.jlmaudio.com/shop/index.php?_a=viewProd&productId=88d=88. Which just
happens to be made by company based in the same city I am in. Anyways I
thought I would share in case somebody else finds it useful.