Ashdown are also I believe more pro A/B amps that can be easily repaired throughout its life, something they still stand by today.
Class D for them is in some cases a disposable amp should it seriously go wrong IE power module dies etc
However the other big brands are heading down that Class D road for very good reasons and that is the public want light weight gear now.
We are slightly off topic but the question about modding an ABM600 to 2.67 ohms was purely out of interest if possible, it’s not.
Mesa, Genzler, GK, Aguilar and more are offering amps to 2ohms or 2.67 ohms which today is fantastic for mixing 8 and 4 ohm cabs or running more combinations.
The ABM600 is a superb amp and will remain with me for now sitting on my 4ohm Ampeg SVT212AV 600w cab.