Technical difference between Expert 250 Pro and Expert 220 Pro

[RvdH]

I just did a 220 Pro CI and 250 Pro CI side by side comparison last week using a GT1 speaker with SAM enabled to 100%.

The 250 Pro sounds noticeably better, especially in the bass part it is noticeably fuller, more energy, and this contributed a lot to the overall sounding experience. I was surprised the difference is so distinct.

Guess the capacity of the capacitor inside 250 may be bigger than 220 so it can keep more power ready for the bass when needed? I am just guessing.

I am very interested to see how a 440 Pro compared to 250 Pro, anyone has experience here?

There are not many second hand 250 Pro for sale otherwise I will upgrade the 220 Pro, the difference is just quite noticeable. And once you use the 250 remote, you won’t like the 220 remote at all.

The difference between the remotes is only that the logo turns on the 250 remote and the casing ihas a slight bend, like the casing of the 250. 

The difference between the 440 and the 250 depends on what speakers you use. My speakers have active subwoofers built in so for me the extra power of the 440 did not do much. That is why I went from a 220 to a 250. And because I like the case better. I spent my money on better speaker cables. That improved the sound more than going from a 220 to a 440 did.