I just picked one up. They have versions that record to SD card as well as phone, and also a version that is phone only (no SD writer).
- It's smallish, 8hrs of internal battery, 2XLR inputs with phantom power.
- New version coming out soon that has analog limiters too.
- Balanced outputs (1/8" connectors) that skip ADDA conversion (confirmed by the company president, who answers emails). So you can run it as a tiny self-powered external preamp. This is why I wanted it, as it's a lot smaller than a Shure FP24 to expand the MixPre-6 to channel 5/6.
- It's pro-durable unlike zoom. On YouTube, they have videos of running it over with a car.
But:
- Limited metering (just an LED light that tells you if you hit -6)
- I did blind A/B tests using matched stereo pairs of MK21 and also CM4 and OM1 on soprano voice, one mic connected to R4R and the other to MixPre-6, mic capsules within 3" of each other for each stereo pair. Identical cables, and both recording at 24bit/48khz. The soprano could tell with 100% accuracy which mic was recorded via Mixerface and which went through MixPre. I didn't believe it, so i swapped the mics and cables, and she could still tell. In all A/B tracks, she *slightly* preferred the MixPre (she described it as more full and less linear... I think that means converters?). For what it's worth, I cannot reliably tell the A/B tests apart.
- I should note that they have improved the pre's as well since Mixerface version I have.
I'll still run it as a stealth 2ch recorder+phantom+pre's.