Also, for people who want phantom powered balanced out, there is a version I beta tested since 2008 professionally recording multitracks. This circuit is also pure class A and runs on 48 volt phantom. we are not quite ready as to this box because we need to reduce power consumption a bit because the beta versions i built were powered off of AC powered preamps and consoles. So this is a "coming down the road soon" variant of the n-box/bill box with active drive xlr outs phantom powered. So some other goodies coming on down the pike also.
Bill Reutelhuber