Yeah, I think the MicroTrack is just a piece of crap...I've been reading around, look at the terrible results it gets here: http://www.avisoft.com/recordertests.htm
...I don't think even an extra 10DB will be enough to rise above the noise floor for the kind of ambient sounds I'm going for...
I wouldn't mind spending another 150 on a preamp, but it would need to be stereo; and portable, or at least have a 12v or so DC. What would you recommend? The Naiant looks quite good. Though I wonder if the TRS line ins are even any good...it might be a losing battle.
I always thought it was just the bundled Mic wasn't great...
I wonder what shoud I replace it with, maybe a SONY PCM-M10, would be a cheap option...
...or maybe I should just use my crazy FireFace idea...the Pres on it are probably as good, if not better, than SoundDevices? Or not?
...or maybe I could go for a Apogee Duet 2 and use my MacBook Pro closed as a recorder (using InsomniaX) in a bag...
(Sorry to be throwing so many ideas out; thanks for any help!)
Unfortunately, after travelling down the MTII road, I have to agree on "piece of crap". I started with an MTII and AT BP4025 (which is a pretty quiet mic) and the results for ambient sounds were unusable. Paired the AT with an fr2LE and the results were very good. That's my ambient setup right now.
Using your FF and SPDIF out to the MTII should give you good results and relieve some concerns about the NT (I've not used one).
Last word:
My MTII is used as a backup bit bucket. I use an apogee MiniMe SPDIF out to another recorder, with AES (transformered) to the MTII.
I was lucky and got my fr2LE on ebay for $275 (mint). I think it's a great ambient recorder with lots of runtime with an rc battery.
But I'd try the FF first to see if the noise is coming from the mic. I've read other stuff about foley guys collecting ambient sounds using the NT4 and the 4025.
Self noise on the NT4 about <16, on the 4025 about 14, so I doubt that most of the noise you hear is the mic.
I've not used other small recorders like the M10, but I think the fr2LE makes a nice ambient recorder, a lttle larger than other minis, but an rc battery fits inside so no worries about external batteries. I use it at clubs too, either line in SBD or from mics and have had good results. You do have to reformat the card to change sample rate, but that's not a big deal to me. I reformat for every use anyway.
Hope this helps,
Dave