Might be silly question but I prefer to be sure. All that SP-SPSB-X battery boxes are also preamps but without any flexibility left for user, right?
No. Battery boxes supply necessary power to the mics, with no gain. Preamps "amplify" the signal, and it just so happens that just about every preamp also is set up to provide that power the mics need.
So if someone is running a MT2 which supplies enough power for AT853 mics, there is really no need for the battery box (unless you wanna roll off some low end)?
Curious b/c I ran my first stealth recording the other night (at853>mt2). The recording came out pretty okay. Seems like there's some distortion on the low end though. Not sure if I should've used the box?