REW Forum

**AudioIronHorse** · **03-13-09, 04:15 PM**

Alright all,

Well, I've finally got some measurements completed and thought I'd submit them for your thoughts. Take a gander and let me know what you think please.

The first graph is of the sub only. It's crossed over at 200hz.

The second graph is of the sub and mains crossed over at 80hz.

I think the graphs look pretty decent from a newbie point of view.

The sub is an svs Ultra 12 tuned to 16 hz. I have no BFD and haven't messed with the built in PEQ of the SVS yet.

Let me know your thoughts!

Best wishes,

D

**brucek** · **03-14-09, 08:21 AM**

Please post using the standard graph settings of vertical = 45db-105dB and horizontal = 15Hz-200Hz.

Let's see a sub alone, and a sub with mains with the cross left at 80Hz in both cases.

brucek

**Nuance** · **03-15-09, 12:49 AM**

How does the PEQ of the PB12 Ultra work, anyway? My buddy has one and has a nasty spike at 60Hz.

**AudioIronHorse** · **03-15-09, 02:56 PM**

Alright Brucek,

Here are the plots you request. The first is the sub only with the crossover activated for 80 hz.

The second plot is the sub and mains together at 80 hz.

Nuance:

The PEQ function allows you to cut one frequency that your having problems with in your room. If your buddy had a 60hz spike in his room, he could use the PEQ to dial it in for that frequency, pick the width of the frequency range (EX. -70HZ), and then adjust the amount of cut you would like in order to tame that peak to better match the rest of your curve. It's kind of like a 1 channel BFD.

Ok, have at it!

**al bundy** · **03-15-09, 04:47 PM**

You still didn't change your graph settings. In the top right side of REW you will see graph limits, for sub only use vertical = 45db-105dB and horizontal = 15Hz-200Hz and with full range use 15Hz-20,000Hz. Also, after clicking on measure, change start freq to 15 and end to 200 for sub only and 20,000 for full range. Make sure to disconnect mains when doing a sub only. You can also uncheck the mic/meter cal and soundcard cal in the graph. Good luck

**Wayne A. Pflughaupt** · **03-15-09, 04:50 PM**

Quote:

AudioIronHorse wrote:

Alright Brucek,

Here are the plots you request. The first is the sub only with the crossover activated for 80 hz.

The second plot is the sub and mains together at 80 hz.

Looks like you overlooked 1/2 of brucek's request:

Quote:

brucek wrote:

Please post using the standard graph settings of vertical = 45db-105dB and horizontal = 15Hz-200Hz.

Let's see a sub alone, and a sub with mains with the cross left at 80Hz in both cases.

brucek

Regards,
Wayne

**AudioIronHorse** · **03-15-09, 08:47 PM**

My bad...
I missed the 200Hz part.
I'm on it now...

**AudioIronHorse** · **03-15-09, 11:50 PM**

Alright, I think I got the graph scale figured out.
First on is just the sub, second is sub and mains.
Let me know your thoughts.
Thanks.

**AudioIronHorse** · **03-16-09, 12:02 AM**

Try this one for the sub and mains together.
I think I had the first one scaled wrong.
Thanks for your patience!

**al bundy** · **03-16-09, 12:12 AM**

1st graph scale is fine. Looks like it is not calibrated right, way high, or the EQ has the low end boosted? Make sure you go through the entire calibration process. 2nd graph need to be same as 1st but up to 20k. look at my post above. You stopped the full range measure at 2,000 instead of 20,000, not a big deal.

When you do the full range, make sure to use 1/3 smoothing.

Advertisement