Anti-Mode X4 tested by AVPlus magazine, read the review (in Finnish) from:  DSPeaker_x4_AVPlus_0119.pdf "much more than the sum of its parts".

Translation in English: "much more than the sum of its parts"

AudioVideo.fi reviews Anti-Mode X4

"A single box, many fine talents" ("Yksi laatikko, monta hienoa taitoa")

DSPeaker Anti-Mode X4 -huonekorjain-DA-muunnin-esivahvistin testissä (in Finnish)