I preface this by saying that if you use an external power supply on your Chord products it will void any warranties you may have. That said, I had a customer trade in a Dave, MScaler, and a Sean Jacobs DC4 for each item. It did make a noticeable difference in the width of the soundstage. The Sean Jacobs power supplies are large and they might have the worst packaging I have ever seen but they sound great and definitely don't run hot.
Chord Dave and lInear power supply
I had been using Chord Dave and Mscaler for 3 years.
I installed linear power supply by Farad which cost me around 3k Euros including three separate power supplies.
Wow it is worth every penny.
I get more clear separation of each instrument with more tuneful bass.
Also slight sibilance is gone.
It is Dave +. after modification.
If you own Dave, you had better try it.
The installation is rather handy.
You need to follow instruction.
Thomas