why dont you try doing it yourself?
if you want a good output from your THX system you need to go beyond the default settings.
Normally default or factory settings are calibrated with high overpowered bass to catch the attention of the clients....when they are put on display..so when you buy and set it up in your living room it dosen't match your surroundings.

Aana free, jaana free,
Pakde gaye tho khana free.