" Are the Spectrons really special sounding in any way compared to other popular Class Ds like newer Bel Canto Refs or Wyreds?"
If you really want to know then buy them and compare. Spectron and Wyred are sold direct with 30 days money back guarantee and I am sure you can find Bel Canto dealer who can lend you the pair.
"The specs I see on the Spectrons do not look like anything special in comparison to other well received Class Ds. Am I missing something? "
Yes, you are missing something: specs. For example, Bel Canto people will tell you that their amp will not drive speakers with impedance below 2 ohms (since Wyred are based on idenitcal ICE mass production module then it should be the same there) but Spectron is stable to 0.1 Ohm. Read more.
Don't buy amp on the basis of specs alone. Listen and listen in your home without sale pressure!
If you really want to know then buy them and compare. Spectron and Wyred are sold direct with 30 days money back guarantee and I am sure you can find Bel Canto dealer who can lend you the pair.
"The specs I see on the Spectrons do not look like anything special in comparison to other well received Class Ds. Am I missing something? "
Yes, you are missing something: specs. For example, Bel Canto people will tell you that their amp will not drive speakers with impedance below 2 ohms (since Wyred are based on idenitcal ICE mass production module then it should be the same there) but Spectron is stable to 0.1 Ohm. Read more.
Don't buy amp on the basis of specs alone. Listen and listen in your home without sale pressure!