First model with a fully functional QSD transmitter and receiver, it used the same receiver as the V6.1. It had the following features;

4X digital Quadrature clock generator for low noise receiver/transmit.
Built in low voltage regulator to help eliminate receiver noise and ground loops.
1 watt CW/SSB, capable of any mode available in the software.
Low cost op-amps pin compatible with super low-noise op amps for slightly better noise floor.

This was the most difficult kit in the series to build but it works quite well.

It's a retired kit that is no longer available.

Here is a directory with documentation on the Softrock models;

File directory