NOTE: This preset is for EE version 7.1.x
Put files to ~/.config/EasyEffects/output
Preset was created primarly for Z333 & Z337 and also was tested on Z333, but probably/maybe can be used on any 2.1 speaker. Preset can be customized for Your needs and Your audio system.
Preset is focused primarly for music.
For best experience, I recommend to set subwoofer "volume" at half (50%), on back of Your subwoofer. Like on this image:
I also recommend to place subwoofer to corner of room, as at this schema: 
Preset is to increase DR/LR, enchant, and for bass boost (with increasing hardness and capacity of bass), together with autogain it provide nearly "best" You can get from Z333 & Z337.

Hello, sorry for late answer, I have a lot of projects on right now, and didn't had much time to look into this, but I will try to fix issue during this weekend. The preset should be same as the first one except the equalizer itself, where you could be able to copy the values.