Originally Posted by AustinJerry
Originally Posted by bao01
So how do you decide on the distance from wall to rear of sub? 3", 6", 9", 12"
Does this distance make a big difference?
You fine-tune sub placement by using REW measurements, either measurement sweeps, or the RTA method discussed recently. Once you have found a position along the wall that seems to be the best position, you can experiment with adjusting the distance away from the wall, again taking measurements. In my experience, adjusting the distance away from the wall did not produce significant changes. In my current configuration, the subs are 12" from the wall.
Yep. The variance between 3" - 12" from the wall generally tends to make less difference than the placement along the wall. Of course, measurements will determine if it makes a significant difference in your own room as some factors can change things. For instance, there are some downward firing subs that may work better slightly further from the walls, but for most sealed or front ported designs, the difference in distances away from the wall won't be too significant.
Measure the best locations along the wall first, then, if you like, try measuring the differences with different distances away from the wall.