Speaker Re-Foaming

[stevej37]

Originally Posted by 908/930

Steve get that sub away from the corner, try 7' out. You can try plugging the port. Have you tried running it 180 deg out of phase with the other speakers.

That's the same spot that I had the Advent in and I loved that thing. It's actually at the side of the right front speaker.(I didn't correct the pic for that)
The pic is wrong for the fronts and surround because it would be hard to show that the center speaker is below the tv and the R and L fronts are in line with the tv also.
I never thought of plugging the port...that would be easy to try, which I will tonight. (an old t-shirt should do the trick)

Haven't tried switching the phase either...the Advent was always 'in phase'.

[stevej37]

Originally Posted by Scott Douglas

Steve, does your system allow you to tell it the size or ask for the size of the different speakers in the different locations?
My Denon system uses the Audyssey system which asks the size of the surround system speakers when it does its thing.

Yes, the Sony Amp has that. I have the front speakers as large, the rest as reg. The center I have bumped up a db or so because I need more mid-range for dialogue.

[Scott Douglas]

Bass is omni directional from what I've read, but that corner location couldn't be helping it IMO.
Is it facing the same direction that your Advent was?

[Scott Douglas]

When I changed my rear speakers from the smaller ones I had stashed behind the couch to the Crescendo's all I did was go into the system and tell it I had Large speakers in the rear.
Sometimes, even with TV commercials, I worry my wife will come in and tell me to turn down the volume but she hasn't yet so I guess I'm good to go.

[stevej37]

Originally Posted by Scott Douglas

Bass is omni directional from what I've read, but that corner location couldn't be helping it IMO.
Is it facing the same direction that your Advent was?

Yes...same direction aimed at the listening area.
I just measured and it's 3 ft from the side wall and 2 ft from the front wall.
Facing the back wall.

I just copied that pic from the Sony manual....I didn't pay much attention to the sub location, but everything else is quite accurate.

[Scott Douglas]

Do you have a recorded passage where it booms that you can play over and over again?
You could try different locations for the sub if you do.
That'd be one way to find a location where it doesn't boom.

[stevej37]

^^^
I have a Blue-Ray disc player that I could hook up to try that. (I didn't use it for at least two years, so I pulled it)
But the room and traffic area limits the amount I could bring it out. The front of the sub is in line with the front speakers and the tv stand.

[Scott Douglas]

My speakers behind the couch are laying down on their backs on 4x4 blocks, firing at the ceiling. They have ports on the back sides for the bass speakers.
You might try laying it down to see how it works.

[908/930]

With your main speakers having two 8" woofers I would keep the subwoofer crossover lower down around 50hz. See what the room sounds like with just the sub at that freq. And try up to sub location 6'-8' from the front wall, or centre of front wall.

[stevej37]

Originally Posted by Scott Douglas

My speakers behind the couch are laying down on their backs on 4x4 blocks, firing at the ceiling. They have ports on the back sides for the bass speakers.
You might try laying it down to see how it works.

The bottom or sides would show the plastic feet and not the grille. The back side has the connections, so I would need to block it up as you did.

I think the location of it is about the best I can get....given the room. Tonight I will try stuffing the port first, and switching the phase.
I might reconnect the Blue Ray and load up 'The Matrix'. One of the best test discs.

[ErVikingo]

I'll try to simplify as it could take a lot of typing to explain it all.

Your room has modes at 31hz (dip/null at 8.7' approx.) 63hz (dip/null 12') 94hz (14'approx) 126hz (15 ft).. both lengthwise and widthwise.

When you say you are 12ft away, is that from the front wall or from the speaker's faces?

I would put my ears closer to 10' from the front wall to stay away from the nulls. By the way, sitting at the center (widthwise) puts you smack in the center of the null at 31hz and 94hz.

As to crossover setting on the sub, your Yamaha's go down to 55hz so I would set the sub at 65-75hz to get it to blend as the Yamaha's drop off.

These are just suggestions, I will try to give you ideas of positioning for the speakers

[Scott Douglas]

I can't even see my rear speakers, which I'm sure pleases my wife.

I like the fight scene in Sherlock Holmes where he fights the guy under the dry docked boat. There are some passages in it that you feel more than hear.

[stevej37]

Originally Posted by 908/930

With your main speakers having two 8" woofers I would keep the subwoofer crossover lower down around 50hz. See what the room sounds like with just the sub at that freq. And try up to sub location 6'-8' from the front wall, or centre of front wall.

I will try that...I haven't had it that low yet. The Sony has the options for sub placement in the menu.
The gain is so touchy on the sub that the smallest twist makes a big difference.

[stevej37]

Originally Posted by ErVikingo

I'll try to simplify as it could take a lot of typing to explain it all.

Your room has modes at 31hz (dip/null at 8.7' approx.) 63hz (dip/null 12') 94hz (14'approx) 126hz (15 ft).. both lengthwise and widthwise.

When you say you are 12ft away, is that from the front wall or from the speaker's faces?

I would put my ears closer to 10' from the front wall to stay away from the nulls. By the way, sitting at the center (widthwise) puts you smack in the center of the null at 31hz and 94hz.

As to crossover setting on the sub, your Yamaha's go down to 55hz so I would set the sub at 65-75hz to get it to blend as the Yamaha's drop off.

These are just suggestions, I will try to give you ideas of positioning for the speakers

12ft from the speaker faces.
As to where I usually sit....off to the right side, not the middle.
I will try the lower cross-over tonight....I'll leave the gain as it is.
Thanks for your research.

[ErVikingo]

and the speakers are how far off the wall?

[stevej37]

Originally Posted by ErVikingo

and the speakers are how far off the wall?

They (front, left, center, sub) are all close to 1 ft off the wall...measured from the speaker backs. All in a line because of the tv stand holds the center speaker.
The back speakers are flush to the outside walls...because they are reflective.

[ErVikingo]

Your room's modes:



Not too bad (according to modeling). I am assuming the speakers face is 1'11" from the front wall and 3' from the side walls. In this setup you have a null at 54.5hz which the SW will/should correct.

Try bringing L/R away from the front wall 2' 11"(to 3') to the face of the speaker and see if you like it better. Don't worry too much about maintaining the same distance (to the listening position) as that of the center channel. Not such a big deal and you will gain quite a bit of soundstage.



You can play with the position of the subwoofer. It is not ideal but if it doesn't feel right to you, I would put in on the sidewall at "1'11" or 5'9 from the front wall.

here it is a 5'9". You remove replace the null at 54 with one at 46 albeit not as deep and reduced the null at 80!.



These are all suggestions but let your ears (and WAF) make the final determination.

If you are aiming for music listening, I would suggest something different. Hope this helps.

[stevej37]

Maybe closer to two feet from the face to wall...the Yamaha towers are 14 inches deep.

The system is used 100% for tv and movies....streaming on Netflix is the largest use.

I can't move the speakers out much....there is a coffee table in front of the couch and that cuts down on the thru traffic area already.

I'm going to try getting the sub to work better first. The pic below is the back of my old Advent...I don't see anything on it that would make it better than the Klipsch.

Thanks.

[KFC911]

^^^^ Why does it say Sunfire (i.e. Bob Carver) on it . I'm not a fan of subwoofers, but was always under the impression that their location wasn't as critical like speaker placement is....

I wonder if Rusty knows ?

[ErVikingo]

I have a couple of Sunfire Signature Subs for movies. For music, my little speakers have plenty of bass extension