[nezff]

Just maybe wanted to get some advice, explanation etc..

I have had my dual 18s for most of their life in the front of the room. They sound somewhat ok, but I dont get that boomy sound during movies. I do get the rumble, and somewhat that bass feel, but still feel it is lacking. I have moved one of them to the rear of the room over me left shoulder while sitting in my middle chair. It was not any better. The bass got way more substantial when moving closer to the wall that it was on.

Here is a pic of what they have always been situated like:



Here is what I decided to do recently to see what they sounded like: Turn the woofers so that they face the corners on the front of the room. The bass is more boomy but I actually had to turn them down to -8db in Audyssey(which is what it found them originally) I was running them hot at -3db and -2.5db. Movies definately have more of a punch, and the bass is definately there now. Basically Im assuming I just HORN loaded them so to speak?

My main gripe is the way they look because of course you can see the amps and cords with them situated like this. No biggy though. Im mainly wondering if this is more of a NO NO in home theater or what? The subs put out a tremendous amount of bass but where Im sitting the bass is somewhat lacking because of my room I suppose. Not real sure how to correct this.

thanks and any advice would be appreciated.

 

[ronny31]

Well, I avoid boomyness, even in car builds (especially in car builds). But its definitely easier to achieve high enough db on low frequencies by corner-loading the subwoofers, but the best corner loaded woofer setups don't add boomyness, just pure practically silent db. A dozen ways to corner load subwoofers, even up in the roof corners since that's the opposite corner to your chairs. But the easiest thing would be to have the subs a meter or so in front of you (legs length). Rule number one if you want more db is to get closer to the source. If they obstruct the view to the screen, remember that each subwoofer have six sides to it.

 

[derrickdj1]

Facing the drivers toward the wall loads the driver. It increases efficiency so, nothing wrong with it for HT other than looks. Corners can be boomy but, a little PEQ to the system or re-run autocalibration may solve the problem.

 

[Bill Fitzmaurice]

The subs put out a tremendous amount of bass but where Im sitting the bass is somewhat lacking because of my room I suppose. Not real sure how to correct this.

Move where you're sitting. I'd be willing to bet your seats are in a zone where the distance to the wall behind them is causing cancellations. I say that with confidence based on how far in back of them you were standing when you took that picture. The distance to that wall which will cause cancellation somewhere within the woofer passband of 20-80Hz is 3.5 to 14 feet.
By the same token having the baffles of your subs anywhere between 3.5 and 14 feet from the wall behind them would also result in cancellation. That appears to be the case in the first picture. Turning them towards the corner eliminated the cancellation.

 

[nezff]

The subs put out a tremendous amount of bass but where Im sitting the bass is somewhat lacking because of my room I suppose. Not real sure how to correct this.

Move where you're sitting. I'd be willing to bet your seats are in a zone where the distance to the wall behind them is causing cancellations. I say that with confidence based on how far in back of them you were standing when you took that picture. The distance to that wall which will cause cancellation somewhere within the woofer passband of 20-80Hz is 3.5 to 14 feet.
By the same token having the baffles of your subs anywhere between 3.5 and 14 feet from the wall behind them would also result in cancellation. That appears to be the case in the first picture. Turning them towards the corner eliminated the cancellation.

are you saying move my chairs up? The distance behind my seating to the rear wall is roughly 11 feet. The chairs are roughly 14-15 feet from the subs. Maybe move closer to the screen?

 

[nezff]

Facing the drivers toward the wall loads the driver. It increases efficiency so, nothing wrong with it for HT other than looks. Corners can be boomy but, a little PEQ to the system or re-run autocalibration may solve the problem.

They definately seem to be. They pump out plenty even cut low. -8db

 

[ronny31]

Move both seats and subs back and forth a bunch and test some sweeps, don't be lazy
I completely forgot about cancellation, good catch from Bill.

 

[nezff]

The subs can't really go too far uP unless i move the whole setup closer. The seats can.

 

[nezff]

Also if I'm understanding correctly, the subs are about 1-2 feet from the window wall. I'm not sure if you meant the front of the subs should be 3.5 to 14 feet from that wall? Not sure how possible that would be. Sub is 30 inches deep

 

[Alan P]

How about directly behind the seating, firing into the seats?? I mean directly behind, like inches.

You have REW up and running, right? If not, shame on you....a beautiful setup like that deserves proper calibration.


I remember seeing pics of your room on here a year or so ago, still a very beautiful setup!

 

[nezff]

Never used rew. Thought about it a number of times but never knew what I needed or where to start. Also the subs in the pic aren't inside the speakers, they are on the outside of the speakers

 

[Alan P]

Never used rew. Thought about it a number of times but never knew what I needed or where to start.

See the link in my sig.

 

[Red99]

Josh Ricci will often place the subs he is testing indoors in the corner facing towards the corner also.

QUOTE: .Note: I often get asked why I fire the drivers into the wall or the corner and the reason is because it often flattens out one or two response notches that can appear from cancellation due to the reflection from the wall. Not in the deep bass where the sub does its heavy lifting and the wavelengths are too long to be affected much, but up higher in frequency around or above the crossover to the other speakers. Depending on the placement or size of the sub this does not always amount to much but it can help in the crossover region or mid-bass sometimes.

 

[nezff]

here is the distance from the chairs to the back of the room. Dont mind the extra chairs behind them. Those were extra when I was thinking of doing a riser/pj etc... a long time ago.

distance is roughly 11 feet from rear of chair to rear wall where the doors are.

 

[nezff]

here is a pic of where the subs usually sit. On the outside of each speaker up front.

 

[Bill Fitzmaurice]

are you saying move my chairs up? The distance behind my seating to the rear wall is roughly 11 feet

Yes. That 11 foot distance to the rear wall will give a cancellation centered around 25Hz. The rear seats being perhaps 3 feet closer to the rear wall will have a cancellation centered around 35Hz.

 

[nezff]

Yes. That 11 foot distance to the rear wall will give a cancellation centered around 25Hz. The rear seats being perhaps 3 feet closer to the rear wall will have a cancellation centered around 35Hz.

Ok. So would you suggest I move them closer to the front?

thanks for the help so far.

 

[tvuong]

Those subs and speakers look nice. What are they? DIY?

 

[Red99]

Those subs and speakers look nice. What are they? DIY?

I believe its Elemental Designs

 

[derrickdj1]

That is a great looking room. Remind me of Starwars for some reason.