Hastily bought a PR-2 a few months ago, but have not had the time to try it out.
There's a new firmware update (V2.0, 2025.05.20 is listed on APP Version screen in the Firmware menu) that seems to be available exclusively through the Sidus Audio app. I can't find this firmware on Deity's website, and I neglected to screen capture the change log of the latest. Seems like a "Mixer" option was added? I'm not sure what function this serves. Doesn't seem like they've added peak metering yet, either.
For me, I am impressed with the PIP. I have run CA 11, CA 14 and AT 853's without the usual preamp, and the sound is really excellent.
I did some screwing around with my gain during the intro tape trying to find a sweet spot and settled on +12 in each channel, that still only yielded peaks around -15 db I think... Spot checking the recording I’m quite happy with it given the real bare bones rig of CA-14 cards right into the Deity.
This is the info I was looking for as a newbie with CA-14 omnis, thank you.
The primary advantage is the 5v power. If you are using a different way to power your mics there’s no longer a huge benefit.
^This. To my way of thinking the advantage of PR2 is mostly about its smallness as an "all in one" via elimination of the need for an additional battery box or preamp.
I'm still seeing some users here opt for powering the mics with a battery box, instead of directly into the PR-2. Is it to prevent variance in expected response, as tapeheadtoo stats below? My only notion on the necessity of a battery box is that it "improves high SPL performance", where portable recorders with lower voltage PIP will distort at high SPLs. Have I understood that correctly?
(I'm pretty sure a lack of a battery box is what ruined a few recordings of mine - a local gig where CA-14s were under-powered by the mic in on a Zoom H1n, and a similar failure at a Melvins show, with SP-TFB-2 > H1n

)
What threw me off before:
Previously for these mics (DPA 4061) I always used a 9V battery box whereas PR-2 supplies only 5V plugin power. It didn't occur to me there must be a linear relationship between voltage and response. So the response was markedly different from what I've seen before testing other setups at home (speakers, claps, etc).