I've had the marantz sr 6200 for about 8 months now and I always noticed a big diffrence between lfe in DD and DTS tracks. first of all here's the setup sr6200 chiro c-300 amp for LCR dahlquist qx9, qx60, qx20r sv 20-31 pci sub harman kardon dvd 25 I used avia and the spl meter to calibrate to 80 db DTS always has so much more bass so i looked under all the settings in the osd and under the SURR-MODE screen there's a setting for dts/dd lfe level. The poorly written manual says default for DD is the 00db setting and default for DTS CDs is -10db setting. Why does it say CD's does this also mean DVDs to? So i guess DD sound is set correctly but DTS is way to high. So i changed it to -10db so now dts is ok but DD is -10 too. I tried changing between dts and dd in the auto mode and the lfe setting is still -10db so do you have to change the lfe setting everytime you change soundtracks? How are you supposed to acuratly level for both DD and DTS? But going back to avia, which is DD, Since i calibrated correctly for that shouldn't the DD be properly calibrated-so why is the bass level so low? I heard about marantz puting a lfe peak limitor, is this true and how would you compensate?