ARC EQed

[davef]

Any suggestions as to what is causing that large dip around 150-160hz in both my fronts. The STC OTOH looks very good in comparision to the L/R after ARC did its thing?

Wow -- that is a fantastic in-room response! I am most impressed with the tower's response before the autoEQ That annoying dip in the 150Hz range is floor bounce, where the response of the lower woofers is "bouncing" off the floor and going back to your mic, out of phase with the "direct sound" from the woofers thus causing both cancellations at certain frequencies and boost at other frequencies. You won't see it so much with the center channel because the woofers are at a different height and the center is sitting on a large baffle (it is still there though)

Don't be concerned about floor bounce, it is unavoidable and looks much worse on an on-axis frequency response measurement than it really is. Move the mic (or the speaker) even an inch or two higher or lower and the measurement in that region will change significantly. Keep in mind that what you are hearing is a combination of the direct sound and indirect sound (reflected sound) and since the fundamentals of each subsequent reflection are going to be at difference frequencies, they tend to even themselves out when considering the overall response to our ears (especially in the case of floor bounce). In most cases, it is better if AutoEq systems apply only minimal corrections to this range as too much compensation makes the speakers sound boomy and unbalanced.

[billy p]

Hi Dave, just wanna say thanks ...for the kind words and taking the time in explaing things so I can better understand what was going on. Yeah...I'll use those tips & see if that changes anything...but it won't be until I can switch out my current surrounds with some new HTM-200's...will be talking to you guys soon.

Re: Bill...