Re: 120 HZ crossover?
Originally Posted by
davef
This depends, there are really a lot of variables at play. If you move them ~ 12" closer to you, you will lower this dip into the range where you cross to the sub which will help a lot. If you move them ~ closer to the wall such that the back of the speakers is ~8" from the wall, you will raise the frequency of the dip above 200Hz such that Audyssey will do a much better job of correcting for it.
My recommendation is to experiment with both options and report back. There are also side wall and floor bounce reflections to deal with so always best to try different positioning options.
Today I spent some time taking measurements with the speakers in two separate positions. First I measured with the speakers 18 inches from the wall with the crossover set to 80hz. In this first position when changing the crossover to 120hz or 150hz the measurements did not change. Here are the measurements for that first position.
80hz - 80.5
90hz - 79.5
100hz - 77
120hz - 63.5
150hz - 66.5
200hz - 74.5
Then I moved the speakers so there are 8 inches from the wall with the crossover set to 80. In this position 120hz increased slightly and 150hz dropped significantly lower yet. Here are those measurements.
80hz - 80.5
90hz - 79.5
100hz - 80
120hz - 66.5
150hz - 53
200hz - 74.5
Then in the second position I tried the crossover at 120hz. When I did this the reading jumped from 66.5 to 72.5 at 120hz. Then I increased the crossover to 150hz. This put 120hz at 72.5 and 150hz at 71.5. Without increasing the crossover to 150hz there is still the dip at 150hz. All of these measurements were taken with the receiver set to stereo. When I switched the mode to all channel stereo with the fronts center and surrounds playing together I could crossover at 120hz and could get 150hz to read 67.5. For reference I have the surrounds and center set with a crossover of 80hz.
After all of that I have been listening to music in stereo with the crossover set to 150hz. So far it seems good. I will leave it this way for a while to see how I like it and if i notice any localization coming from the sub.
Last edited by kinggimp82; 04-18-2018 at 06:24 PM.
Andrew
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TV: Panasonic VIERA TC-P55ST30 55-Inch 1080p 3D Plasma
Receiver: Onkyo TX-SR706, Emotiva XPA-5 Gen 2, Blu Ray: Sony BDP-N460
Fronts/Center/Surrounds: Sierra Towers Nrt, Sierra-1, HTM-200
Sub: HSU VTF-3 MK-4