if i wanted to run my psp2 or v3 in front of the acm, what's the way to do it? the acm only affects the mic in correct?
i'm lost as to what's the "proper" way to run a pre in front of it; line in or mic in (with the -20 pad engaged) and achieve the max out of both boxes.
For the V3 I'd run s/pdif in, if you wanted to hear the difference in the A/D you could run line in, I'm thinking from what I've heard mic in even with the -20att switch engaged your signal would be too hot.
I forgot to ask Doug last time I called, but I beleive he did mention that the ACM did have some effect with line in. I'm just trying to go off memory here, but we were talking 671/HD-P2 and I think he said the P2 had less self noise than the stock 671, but that the modded 671 took care of that issue. If that's the case it's probably due to cleaning up the signal path, not just upgrading the mic pre portion of the unit.
I've seen a couple people mention that there are no advantages to running line in w/ an ACM671 vs. a stock 671, that might not be the case. I have to send my unit out (stock) to have Doug mod it, when I call for the RMA# I'll ask him for clarification.
I ran my B
CM671 a few times mics>unit, and compared it to mics>V3>671 (dig in) the only difference I could come up with was perhaps a little more speed and detail, maybe a touch more of a black background with the V3, things improved upon with the ACM. Hearing some of the ACM recordings out there, it seems that the mod does a great job in those 2 areas, making me think what I heard with my BCM had to do more with the analog stage of the 671 and not the a/d.
I have to make up a set of XLR > RCA cables to run the 148 > 671, if you want to try adding a little warmth to your recording that psp2>671 should do the trick.