My question is still up...
But because I see it:
Originally Posted by cg27288
If I have to set the sub to 120 how do I do that on this model? When I go to Setup-->Speaker Setup-->Speaker Configuration I only see these options:
There's also "LPF of LFE" which is currently set to 120Hz?
Sorry I'm clueless here and I just want to make sure I set this up right. I copied and pasted this from cnet.com which is basically what I"m trying to achieve:
"We experimented with the subwoofer crossover control, first setting it to 100Hz, then to 120Hz; the higher-frequency crossover setting yielded the smoothest bass transition from the subwoofer to satellites. That level of adjustability isn't available on all A/V receivers, so buyers interested in the KHT-3005 should first consult the owner's manuals to make sure they can tweak the necessary subwoofer crossover settings"
LFE channel and general x-over aren't the same.
LFE is the dedicated subwoofer low frequency effects channel provided on Blu-Rays and DVDs carrying signals from lowest to 120Hz. The low pass filter (LPF) on this one does exactly that. Only the signals below that frequency will passt and be sent to the Sub. Therefore, it should be left at 120Hz unless your sub has problems delivering frequencies above a certain frequency or your're experiencing any other problems with that setting (exessive localization of the subwoofer for example).
The speaker x-over, however, is the handover-frequency from the "real" sound channels, which can contain material over the complete frequency band. If you set it at 60Hz, the subwoofer will receive everything below 60Hz and the speakers the frequencies above. As a general rule, setting this between 60 and 100Hz will be best most of the time, as setting it too high will make localization of the subwoofer possible... nothing you'd want. On the other hand, you obviously can't set it lower than what your speakers are capable of. Therefore, you shouldn't go below their -3dB point. Furthermore, you have to consider that the lower you set the crossover, the harder your receiver's amp has to work because your main speakers are usually passive and powered by the receiver while the sub has its own amp.
To answer your question: Of you want to crossover your speakers at 120, set each speaker (Front, Center, Surround) to 120Hz.