Agreed - I've never used the Tone Hammer but I don't think there should be a problem. Aguilar was probably concerned that people might have the gain on their active bass cranked to 10 (not realizing that the whole point is that you can turn it down without losing frequencies like on passive basses), maybe even with bass & treble boosted - that would probably overload the unit. But one of the great things about Alembics is the trimpots that allow you to adjust the output without sacrificing tone.
Once on talkbass there was a guy who had just gotten a Musicman Stingray. It was his first active bass. He said that he was a turn all the knobs all the way on kind of guy and that's what he was doing with this bass. People tried to tell him that this isn't the way you normally use an active bass - 0 is in the middle, not at 10 like on a passive bass - but he wouldn't listen and stubbornly had everything all the way up.
This reminds me - I need to adjust the trimpots in my Stanley Clarke bass - they are set pretty low, then I lowered the pickups, now the output is really low! Gotta adjust it so that it's close to my other basses...