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#255361 - 04/03/09 05:32 PM Re: I Graphed...Now What? [Re: Ken.C]
SirQuack Offline
shareholder in the making

Registered: 01/29/04
Posts: 13571
Loc: Iowa
are your mains angled inward or straight out? I found by adjusting my 80's further away from the side and front wall, and playing with toe-in, it helped that dip, as did the bass traps.
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#255363 - 04/03/09 05:36 PM Re: I Graphed...Now What? [Re: SirQuack]
Zimm Offline
connoisseur

Registered: 12/08/08
Posts: 1361
Loc: New Orleans
I'm heavily toed in right now to nail the image dead center. My room is small, 1700 cubes I think, in case that matters.
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#255371 - 04/03/09 05:52 PM Re: I Graphed...Now What? [Re: Ken.C]
Wid Offline
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Registered: 06/22/03
Posts: 6789
Loc: The Peoples Republic of Il.

It's nothing a set of M80s can't fix \:\)
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#255380 - 04/03/09 06:03 PM Re: I Graphed...Now What? [Re: Wid]
jakewash Offline
shareholder in the making

Registered: 12/26/03
Posts: 10415
Loc: Calgary, Alberta
With the downloaded calibration settings, the RS meter is good to about 3000hz.
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#255381 - 04/03/09 06:05 PM Re: I Graphed...Now What? [Re: jakewash]
jakewash Offline
shareholder in the making

Registered: 12/26/03
Posts: 10415
Loc: Calgary, Alberta
Mojo was heavily toed in as well and found he liked his M80s even more with just a little toe-in.
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Jason
-----------------
TTTHHHPPPPPTTTT!

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#255386 - 04/03/09 06:09 PM Re: I Graphed...Now What? [Re: Ken.C]
Zimm Offline
connoisseur

Registered: 12/08/08
Posts: 1361
Loc: New Orleans
 Originally Posted By: kcarlile
300Hz is awful low for the thing not to be effective. You might not want to sleep that well at night...
I'm just filling time until someone who can say something useful comes on. \:\)

Thanks, that's just what i was hoping for.
[runs off telling the wife to fire up the car, "got to get a new microphone!"]
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Panny 3000 PJ, 118" Carada, Denon 3300, PS3, Axiom QS8, PSB 5T, B&W sub, levitating speaker wire

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#255387 - 04/03/09 06:09 PM Re: I Graphed...Now What? [Re: jakewash]
fredk Offline
axiomite

Registered: 12/06/07
Posts: 7786
Loc: Canada
I had read that the RS meter was good to around 2000Hz so that agrees with what Jay wrote.

That dip at 70Hz is common in our rooms and often relates to a room height mode. Corner bass traps may help and you can also try traps above the listening position (didn't make any difference for me though).

Both corner traps and thinner (2") traps at first reflection points should help with the dip at 300Hz. Changing speaker position can also help here.
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#255388 - 04/03/09 06:11 PM Re: I Graphed...Now What? [Re: Zimm]
Zimm Offline
connoisseur

Registered: 12/08/08
Posts: 1361
Loc: New Orleans
3000hz?????????? Oh, I have a mess on my hands. I have not even run it that high. I doubt it will get better.
_________________________
Panny 3000 PJ, 118" Carada, Denon 3300, PS3, Axiom QS8, PSB 5T, B&W sub, levitating speaker wire

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#255437 - 04/03/09 09:53 PM Re: I Graphed...Now What? [Re: Zimm]
JohnK Offline
shareholder in the making

Registered: 05/11/02
Posts: 10623
Charles, reflections from room surfaces cause partial cancellations at roughly a quarter wavelength from those surfaces. The dip around 70Hz may be a wall bounce at about a four foot distance(1130 ft. per sec/70 Hz= 16 ft.). Are your speaker drivers about four feet from one or both walls? The dip around 280Hz appears to be a floor bounce similarly calculated arising from about a one foot distance. You need to move your walls and floor.
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#255450 - 04/04/09 01:47 AM Re: I Graphed...Now What? [Re: JohnK]
SirQuack Offline
shareholder in the making

Registered: 01/29/04
Posts: 13571
Loc: Iowa
I agree Jay, Zimm I would experiment on the toe-in angle. Having them aimed right at you narrows the soundstage overall width. Like Mojo, I used to do the same as you. I have found pointing them at a point about 2-3 ft behind me gives me a much better sound stage overall where instruments take of the whole width, and the voices are dead center, appearing to come out of the center channel, as they should. Probably will help your graph dips. Also, you don't want the drivers the same distance form the side and front wall.
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M80s-VP180-4xM22ow-4xM3ic-EP600-2xEP350
Anthem AVM60 Outlaw 7700 Emotiva A500 Epson 5040UB



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