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Originally Posted by navin  I know that but we were talking HUs and like gunbir said the HXd2 has a HPF at 20Hz. I did not know that. |
In fact, the HX-D2 can do THROUGH/16Hz/20Hz/25Hz/30Hz and so on... so its not a fixed HPF, one can choose.
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Originally Posted by nura I think the fader works on the pre-amplified as well as post-amplified (direct to speakers) outputs of the HU.
Is there any way one can adjust the volume of only the rear-fill speakers connected to the HU, when the front components & sub are connected through preouts to an amp? |
Well, if you have a 3 preout HU, its simple. Sub level menu controls sub preout, while fader controls front / rear levels. But I guess you knew that. In a 2 preout HU, where you're running the rear speakers off the HU rear channels, they would fade along with the sub.
One option is to use only the front preout of the HU, through to your amp. Then choose a single input to 4ch output mode on your amp (Nura Sir, your SRx5 does this but most budget amps don't).
Alternatively, use the front preout and split it into two preouts using a Y splitter like this,
and then input them into your amps. Assuming your sub amp is a mono, or an amp that has this capability, use a remote bass knob to control the level of the sub.