Controlling Room Effects in my new HT

It looks like you've gotten off to a good start! You've got absorbing panels for early reflections as well as bass traps, which will really clean up your sound. For absorbing early reflections, one method for placing them is by sitting in your listening position while a helper moves a mirror along each side wall. Where you can see the reflection of the speaker in the mirror is where to put the panel. You should place absorbing panels on each wall to absorb early reflections from all three front speakers. Absorption needs to be placed on the ceiling as well as the floor, unless the floor is carpeted. For bass traps, here's a good primer on placement: http://realtraps.com/lf-noise.htm Bass traps need to go wherever bass is a problem, usually in the corners but can crop up in other places as well, depending on the room.

PEQ stands for Parametric Equalization. You need it to reduce peaks in your rooms response. PEQ allow you to set the center frequency and width of the frequency band being corrected. You can find what frequencies your peaks occur with an SPL meter and test tone CD. It's important to remember that PEQ will only reduce peaks at the listnening position. It's not a good idea to use PEQ to boost nulls. The best way to even out bass response (boosting nulls and reducing peaks) throughout a room is by proper placement and phase of the sub (requires experimentation) as well as bass traps. Then use PEQ to flatten whatever peaks remain.

The RealTraps website mentioned above has a free test tone download from 10hz to 300hz in 1hz increments that you can graph out manually. Room EQ Wizzard is nice but you will have to be handy with computers.

Yes, for hobbyists like ourselves, Room EQ Wizard and a Radio Shack SPL meter is one of the best and easiest and cheapest ways to generate a variety of frequency and response data.

Tim

p.s., GIK products cured my room.

Yep, see the following link for the whole saga...

http://www.***************.com/fusio...hp?tid/134369/


Tim

The velodyne sms-1 is a great addition to the bass acoustic adjustments. It made a BIG difference in the total sound in the room IMO.

Yep, treat the room first, then EQ second.

In REW, the measurement sweep takes just a few seconds, then the frequency response chart shows up right away. At that point then you can use that data set to generate additonal graphs by selecting each as needed. Any graph/chart you select is then generated within seconds of when it is selected.


Tim