«  this quality at this price! »

2 preamp channels, lamps, even with limiter worclock-IN and Digital output.

the test sound-on-sound:
https://www.soundonsound.com/sos/apr08/articles/aphex207d.htm

the official data sheet:
http://www.aphex.com/aphex-products/207d-two-channel-tube-preamp/

UTILIZATION

Ultra simple to use, however for me 2 negative points:
- The non-serrated knobs (I often use stereo jack)
- The clip limiter (not in use)

my choice was turned towards this product because I needed a preamp with AES digital output

SOUND QUALITY

The sound is beautiful, and not necessarily typical.
I used ribbons (T.Bone RB500), and really a bit of breath ...
The sound is very transparent.
Simply turn it on at least 5 minutes before using.
the eyelet, I get a signal / noise of the same order as my ULN2 report (Metric Halo) ...

OVERALL OPINION

For several years, I use it, it is a high quality product in my equipment.

I would be 10/10 if the surge had worked (but it may be only a certain series that was sold cheap £ 299!). And at this price, I mad a little limiter ...