I'd respectfully disagree on whether using a preamp or PA as preamp is a good idea.
The MT-series of recorders are made to accept mic~line signals through the basic inputs. Granted,
the MT100 mixer is not very generous on features, (no EQ), but I'd be concerned that if you used a preamp or PA (especially), you'd run the risk of improper gain staging, which in turn would risk burning out the inputs of
the MT-100.
...
Yeah, the MT100II is a nicer unit than the MT100(std),... (has somewhat better features). I couldn't find any difference between
the MT100II and
the MT120, (based on the picture, above).
...
Just MO,... that it's probably best to start off with using the basic functions of the unit. Not that having a preamp is a bad idea, but it's another consideration on how & when to integrate additional gear, (cost & technical issues). The MT-series units were made to be a self-contained solution, (Portastudio-clone).
I've heard of several cases where improper use of preamps has burned out inputs on porta's,... not as a rule,... but as a common concern. The power-out of a PA would be a no-no, but a proper "line-level" output of a PA would be as workable as an external preamp signal, (which should be used with caution).
The MT100 begs the issue needing EQ & better features, which might be addressed by a preamp unit or sourcing a porta' with more high-end features. YMMV. (It seems kinda silly to get a $40 recorder & have to buy a $99 preamp for it!!)
If you use a preamp for sonic improvement, use extreme caution with the gain staging of these units. When properly staged, a preamp may boost the sonics of the basic MT100 recording, which may be great, but as the MT100's a self-contained unit, this is an add-on and not a necessity.
If it were up to me, I'd be inclined trade the MT100 up for a more capable porta. However, a mic preamp or accessory or two is an acceptible upgrade to the MT100, if used with caution.
I guess I'm on the fence about mic preamps fronting porta's,... (as I've heard too many horror stories).
I know this is your first starter unit,... (and the price was right!), so the objective is to learn the ropes, have fun & create great sounding tapes!!
Good luck!
