RIAA phono preamp

Just wanted to let you know that we have designed an RIAA de-emphasis preamplifier for phono playback.
It is designed to meet the AI-ABS v1 specification. This allows it to be plugged into another amplifier or soundcard which implements the specification.
The preamp is designed with film caps and is a single op-amp stage which is converted to differential line output.

If you are interested, you can see more information here :
Audio Injector Pro. sound card with a phono analogue skin by Flatmax Studios — Kickstarter

Open to more discussion here if you like.

thanks
Matt