It's really strange that Art got ruler flat bass at 25hz and Hi Fi Choice in their buyers guide puts the AN E at 22hz-3db. Not getting any much bass under 100hz as The Audio Hobby suggests seems curious to me. Perhaps you are not used to hearing bass with such low distortion.

Incidentally I have the High Altitude Drums and auditioned it with Ray Kimber himself doing the demonstration along with the Recording Engineer who lives about 10 minutes from my house. It sounded better on the AN E than it did with the equipment (Sony/Pass Labs.EMM Labs/Kimber cables). Though I would not really rank it up with the most engaging of music. It's a bit more of a "stunt" disc which will play to certain strengths. The Joe McQueen 10 at 86 from the same RE and ISO Mike isn't a "stunt" and sounds quite excellent.

Though I do find people's listening experiences fascinating - people who actually listened and found issue with certain aspects is completely acceptable.