REW Forum

**dimmie** · **06-24-06, 03:22 PM**

hey all,

I recently bought myself a BK monolith to acompany my kef eggs. And the time has come for me to do some room eq. Because I have quite some boomyness going on, and I want to get a BFD in the near future.

So I guess first thing's first, I need to know where the spikes are in the bass department, so I guess I'm gonna need to create a map of my room.

Can somebody tell me what frequencies to meassure?, is it smart to take every frequency ranging from say 20 hz. to 150 hz. which is the crossover I want to use. Because I've also heard somebody say to work with octaves.

Thanks,

dimitri

**Sonnie** · **06-24-06, 08:54 PM**

Hey dimmie and welcome to the Shack!

You might would consider using 80hz for your x-over.

As far as response measurements I would dive into to the Room EQ Wizard and take some sweep measurements from 20-200hz (which will actually measure 10-400hz) but then you can view what we all consider the normal 15-200hz and see what your response looks like.

Download and install REW... follow the HELP files step by step and then check out the REW Tips sticky thread in this forum here. That should give you a good start.

**dimmie** · **06-25-06, 02:31 AM**

Quote:

Sonnie wrote:

Hey dimmie and welcome to the Shack!

You might would consider using 80hz for your x-over.

As far as response measurements I would dive into to the Room EQ Wizard and take some sweep measurements from 20-200hz (which will actually measure 10-400hz) but then you can view what we all consider the normal 15-200hz and see what your response looks like.

Download and install REW... follow the HELP files step by step and then check out the REW Tips sticky thread in this forum here. That should give you a good start.

thx sonnie,

should I change it just for measurements?, because I like my sound a whole lot better at this x-over.

**brucek** · **06-25-06, 07:13 AM**

Quote:

should I change it just for measurements?, because I like my sound a whole lot better at this x-over.

No, measure with the crossover in plcae that you like. Measure with the sub only to equalize.

You also may find that once your sub is equalized, that a lower crossover may sound better. Any crossover higher than 80 can result in localization of the subwoofer itself, which many find objectionable....

brucek

**dimmie** · **06-25-06, 08:54 AM**

Quote:

brucek wrote:

No, measure with the crossover in plcae that you like. Measure with the sub only to equalize.

You also may find that once your sub is equalized, that a lower crossover may sound better. Any crossover higher than 80 can result in localization of the subwoofer itself, which many find objectionable....

brucek

You're right, I know. with this crossover I have to keep the sub right next to my front three speakers. sound from my sub is VERY directional now, but as long as I keep it close it's pretty good.

I'll get around to the REW and start learning then, and post any questions that may come up.

thanks guys,

dimitri

p.s. has the BFD been discontinued?

**brucek** · **06-25-06, 09:43 AM**

Quote:

p.s. has the BFD been discontinued?

It appears the 1124 was not available for a while, but that problem seems to have disappeared...

Quote:

sound from my sub is VERY directional now, but as long as I keep it close it's pretty good.

Yeah, you're losing stereo soundstage from your mains also.

brucek

**dimmie** · **06-25-06, 05:12 PM**

Ok....

Am I right when I think I have to connect my pc to my spl meter?....because I figured I could just take my spl meter, take meassurements at different frequencies, write them on a piece of paper and enter those values into a computerprogram which would give me a graph, telling me which frequencies I have to alter using my bfd?.

Or do I have to move my pc downstairs and have it actually take those meassurements physicly?.

I am setting up my home theatre, not a pc soundsystem.

**brucek** · **06-25-06, 05:53 PM**

Quote:

Am I right when I think I have to connect my pc to my spl meter?

Depends on the accuracy you want.

The use of tones and SPL meter combined with an excel chart are available for download here here. Download the excel chart that matches the type of meter you will use and then download some tones and you're ready to go..

The more advanced method that most everyone here uses now is with a PC and a program called Room EQ Wizard (REW) and is also available on the downloads page...

Take your pick.

brucek

**Otto** · **06-25-06, 08:16 PM**

Quote:

brucek wrote:

Take your pick.
brucek

Hi dimmie,

brucek is right when he says "take your pick." However, if I were in your shoes, I'd be happy to carry a PC and monitor (a CRT, even!) to the site. It's worth it.

Quote:

dimmie wrote:

I am setting up my home theatre, not a pc soundsystem.

Correct. This is much more important than setting up a pc soundsystem...

Go for it!

**dimmie** · **06-26-06, 02:39 PM**

Can somebody tell me what kind of cable I'll be needing for the spl to pc connection?. If I leave my pc where it is right now, I'll need about 10 meters of it. Is that gonna be expensive?.

I'll also have to check if I've got the right input on my mainboard as I don't have a seperate soundcard, but onboard audio on the mainboard. I've got a standard line in jack, will that be sufficient?.

How do I run the sweep?, do I burn it on cd?, and play it on my dvd player?. Or do I have to send a signal from my pc to my amp with yet another cable?.

questions...questions

Help would be appreciated

dimitri

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