Yeah, that's the point, the warmth and roll off are so subtle that don't make it a flaw nor convert it into a warm amp generally speaking IMHO, which was the impression I got from your comment It's with difference the most neutral Stax amp I've listened to, and also in the same range of low coloration as the own B22, provided the SRD7 isn't considered a colored adapter hehehe. Using dynamic cans I wouldn't say the B22 is colored either.