5.1 Decoder Module 3 | Re:source |
Speaker distances | Center distance |
Distance selection between the listening position and the indi- vidual speakers.
The M51 offers the option to make sure that the acoustic signal reaches you at the right time at the listening position. Here, the M51 needs to know the exact distance from the speaker to the listener.
Main speaker distance
The first time you press the Distance softkey, you can set the distance to the front speakers 
and 
using the rotary control knob. These two speakers should be the same distance from the listener and you can select in the range from 2.0 to 9.9 metres.
1m ≈ 40 inch
1m ≈ 3.3 feet
You can setup the centre speaker distance by pressing the Distance softkey again. Here, you also use the rotary control knob to set the distance.
In order to achieve optimum acoustic reproduction, there should be a certain relationship between the front speaker distances and the centre speaker distance. For this reason, the M51 offers you exactly the correct range to make your selection from.
Example:
Selected distance:
and 
= 4.5 m
Optimum distance:
= 3.0 – 4.5 m
If you can't position the Center speaker within this distance range, you will just have to select a distance which most closely approximates to it.
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