Could be. But like I said, I've seen vids/clips where people were using the 33 with the exact amps I have and they sounded great. So I'm left wondering what's up. Granted, in one video, the player was using EMGs and in the other video, the guitar was an 8 string... But in both videos, there was massive low end. In my situation, I've got the bass nearly maxed out and with the 33, for example, nearly 100% of the low frequencies are just stripped away.
The other two boosts I have from Airis are definitely better. They retain more lows than the 33.