Quote:
brucek wrote:
 If these are sub only frequency response plots, you do realize that phase has no effect until the mains are added? Phase has no effect on a single speaker. It affects the way two speakers interact at their common frequency areas (i.e. crossover).
The smoothing feature is for plots that are above the ~200hz range since comb filtering tends to make the plots unreadable. You require the smoothing to get a feel for the underlying trend of the signal. You don't use smoothing on subwoofer plots. 
I think they look great. You could use a little equalization on the last plot to lower the reasonant peak, but other than that it's pretty good.
They all look fine to me. It's usually never an AVR problem (other than not set up properly with respect to crossovers etc). To determine what the sub can do without the room you can drag the sub into an open area (middle of the room away from walls), and do a near-field measure. This will reveal what the sub is like without the aid or hinderance of the room. Then place the sub into its corner and take a measure at the listening position and see what that pesky room is doing.
brucek |
Thanks....Was curious about the phase...I seemed to get alightly different plots...especially at the extrem low end with just the Sub and different phase.
Base on those last two plots I shows which location would seem to be the best for me? My gut tells me Location #1.
Do you think an investment in BFD to EQ would be something I should consider? I guess more toys to play with is always a good thing =P
I will try putting the sub in the middle of the room and doing the near-field test as you suggest...I assume that means placing the sub in middle of the room adn the pic on the floor nex to it? Probably have to recal things since the SPL reading is going to be much higher?