REW Forum

**rick12667** · **02-21-09, 08:18 PM**

Hello,

I did the setup for the mic and the sound card. I then ran my sub only at 80hz and here is my first try. Can you tell me how this looks and what needs to be done?

Thanks Rick

**Wayne A. Pflughaupt** · **02-21-09, 08:42 PM**

Please re-scale your graph for a 15-200 Hz horizontal and 45-105 dB vertical axis. You can do that by clicking on the "Graph Limits" icon in the upper right corner.

Regards,
Wayne

**rick12667** · **02-21-09, 09:06 PM**

how about this?

**brucek** · **02-21-09, 09:55 PM**

You're going to have to move your sub around the room a bit to try and smooth that response out. It doesn't look too good where it is.

brucek

**Wayne A. Pflughaupt** · **02-21-09, 10:03 PM**

Yeah, I'd call that response "unequalizable" - so bad even an EQ can't fix it. Typically you want response to be in about a 15 dB window between the worst peaks and dips. You have nearly twice that...

Regards,
Wayne

**rick12667** · **02-22-09, 07:19 AM**

This is showing two tempest X subs. I don't have the ability to move the subs as they are built into my front walls. There is one sub on each side of the front stage. Should I run them seperate and see how they look?

**rick12667** · **02-22-09, 08:27 AM**

OK I ran a few test this morning running both subs at different Hz levels and in different phases. Here is the best that I could come up with. Two subs at 100hz reverse phase. Both subs are being driven by a Europower EP2500 amp so not sure if I can do anything with the amp to help change this. Give me some feedback please. Also here is a pic of the front of my room so you can see that I am not able to move the subs.

Thanks Rick

**brucek** · **02-22-09, 08:56 AM**

Quote:

Give me some feedback please

One of the best things for in wall IB mounts is to first check out the locations acoustically.

That is not a good response. It is not equalizable in my opinion.

Try one IB at a time and see if either is the culprit, or is it only when they play together that the trouble begins.

brucek

**rick12667** · **02-22-09, 09:12 AM**

OK I ran each sub seprate at 100hz in both normal and reverse pahse. Here is the results

**rick12667** · **02-22-09, 10:16 AM**

Here is a breakdown using 100HZ

Red = Speaker only at 100hz

Green = Sub only at 100hz phase reverse

Blue = Both sub and speakers at 100hz

Advertisement