does the before and after look ok?

**rexscates** · **11-19-07, 11:17 PM**

this is a treated room with a sealed door leading out.
It is just a sub reading. The 32 hz area has been adjusted but it look like it is a room gain area. I will try to lower it a little more. I will be adding a 15" sub soon and will work on the 32 hz region then.
i am happy with what I see. are you experts also?

ttyl
rex scates

the first one (blue) is before the small adjustments.
the second one (red line) is after the few adjustments.

**Bigdaddy999** · **11-20-07, 05:29 AM**

Just a quick comment on the REW tool itself. You can load both measurements (assuming you saved them) into REW, and then click on the "all measured" tab that you can see in your images. That will plot both curves on the same graph making it simpler to compare the traces.

**rexscates** · **11-20-07, 09:35 AM**

yeah i saw that but am curious how the room itself looks? I did not move anything just did a before measurement and added 3 small filters and did a after measurement. This was the first time I really got to see how my room came out.

so what yah think? the REW does a calibration thingy before you do the add optimized filters that I noticed changes the house curve line.

Also does the Radio Shack calibration the black line auto correct the measured values? i.e. if the black line is one the graph (loaded) it corrects the values on the grpah as its recorded?

ttyl
rex

**brucek** · **11-20-07, 11:38 AM**

Quote:

the REW does a calibration thingy before you do the add optimized filters that I noticed changes the house curve line.

No, the house curve is just a modification to the standard target line. REW tries to create filters with the target line as its goal. You can raise or lower the target line to force REW to be more or less aggressive with its filter suggestions.

Quote:

Also does the Radio Shack calibration the black line auto correct the measured values?

REW measurements result in an impulse response (you can view the graph). The frequency response is created from it along with corrections for the calibration files....

brucek

**rexscates** · **11-20-07, 01:46 PM**

i added a gain of a few db at about 56 (forgot exact value at moment). I have plenty of headroom in woofer. how does the sub look now? I took the advice of Wayne and some of his insights in using wider filters.

i could get almost same reading with 2 drop adjustments and my one gain.

take care rex

**brucek** · **11-20-07, 02:07 PM**

I think it looks pretty good now...

Tip: The floppy icon button on the lower left of the graph is a SAVE graph hot button. Save your graph at the default 800 wide and we'll be able to see it a bit better.

I'm going to delete the same post in the other forum section.

brucek

**rexscates** · **11-20-07, 03:13 PM**

ahh I was doing a screen capture, then opened it in fireworks and then exported it to this site.

the floppy button icon will make things more consistent.

thanks
rex

and glad you think it looks ok

**Wayne A. Pflughaupt** · **11-20-07, 07:38 PM**

Probably would sound better with a more aggressive house curve. Looks like you have only a 3 dB drop between 30 Hz and 65 Hz...

Regards,
Wayne

**rexscates** · **11-20-07, 09:51 PM**

Quote:

Wayne A. Pflughaupt wrote:

Probably would sound better with a more aggressive house curve. Looks like you have only a 3 dB drop between 30 Hz and 65 Hz...

Regards,
Wayne

I used the standard here. its a 6hz drop between 30 and 65. mine started at 81 or so and went down to 75 at 65.

ttyl
rex

**lovingdvd** · **11-22-07, 09:37 AM**

I use a +8db for my house curve - love it! I use a HSU sub (MK3 VT2) in low extension mode - I can hear (well, feel) the sub all the way down to 16hz.

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