I couldn't find anything about this reasonably popular USB 2.0 audio interface, so I took mine apart.
This device costs about €90, I mainly bought it for use with a headset.
Features:
Stereo headphone output / Stereo line output
Mono microphone input, with optional 48v phantom power
Mono line or instrument input
Adjustable gain on both microphone and line/instrument preamp, with indicator LEDs to show clipping
Direct monitor function, mixes the input directly to the output.
Powered directly from USB, no external power supply needed
Quirks:
Before use on Windows, make sure to download the latest driver / firmware, otherwise it doesn't work well
Volume control knob controls both the line out and headphone output at the same time
The exterior. Nice red anodized extruded aluminium case.
The inside. Excuse the out of focus image, on the camera it looked fine. Board is pretty much what you would expect. Most notable is probably the boost converter for the 48V phantom power.
XMOS 6L6C5 GT1325L1 main processor. Can't find much on this thing, but XMOS seems to make 32 bit microcontrollers for audio applications.
SMSC USB3343 USB interface.
Adesto AT25DF041A flash memory
HC595, the good old shift register. Considering it's location it's most likely driving the front panel LEDs.
The heart of the device, a Cirrus Logic CS4272-CZZ audio codec.
They seem to like the JRC 4565 opamp. Capacitors don't seem anything special, although they are 105C rated.
Some flux residue patterns, looks like they used selective soldering.
I didn't take a proper picture, but the potentiometers are Delta branded. Probably this Delta:
http://www.deltaele.com/en/. Hard to tell how long they last, but they do feel very nice. They have some turning resistance, so you won't accidentally blast your eardrums out if you nudge them.
So, the verdict? Seems like a very reasonable audio interface, can't find any obvious faults. Price seems reasonable for what you get. Also worth noting it comes with audio recording and editing software as well. This thing is also sold in a set with matching microphone and headset.
For audiophools this is probably the wrong product, only peasants would use that very average Cirrus Logic codec, those off-brand capacitors and 20 cent opamps. Also the connectors aren't gold plated. It might be assembled by fairies under moonlight, have to ask Focusrite.