I posted this question couple of weeks ago and I didn't get any response, So let's try again ... As you probably know, in AC3 programs not only the low frequency effect (LFE) can be heard from the sub-woofer, but also the bass of all other channels . It’s really important to find the right balance between the the ".1" material and the sum of all other five/six channels. My question is regarding to DTS programs. While I can hear dramatically the differences when I’m changing the LFE balance in AC3 programs, it doesn’t seems so in DTS . Did any one has experience the same? Since I upgrade my receiver to include a DTS decoder(Onkyo Tx-Ds 939) I’m afraid it a situation that occurs only because of that. (The DTS card is not control from the Onkyo main processor) . The logical behind the “Bass level management” says that it suppose to be the same for AC3 and DTS . What do you think?