bauhaus_2116,
The mod is done by a gentleman who manufactures his own electronics... not Empirical, and consist of 6 or 7 bybees and some rewiring, bypassing and parts improvements. But 70% of the improvement he says comes from the bybees alone. As the dac has all surface mounted parts it is not recommended that you attempt too much. There is one area that you can easily (with some skill) place a bybee in that is one of the most important spots for bybees in regard to dacs, right at the digital input. The reason it's easy to install is that the input isn't mounted directly to the board. There is actually a wire (the only one in the dac) that goes down to the board that you can cut and install a bybee in the middle of. The other locations include power supply and output but this requires some serious understanding of the circuit.
I am planning to send my dac to him to have several of these mods done. But since you've got a bybee and some skill, place it at he digital input and let know. Be careful, I doubt the warranty will be honored if its apparent you've been in there mucking about. I know there are different bybee devices and there is a specific one he likes at that location but I'm not sure what it is. No doubt though that any of them would yield some improvement.
