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#322720 - 09/15/10 07:21 PM Bass reduction when sitting down
Riker Offline
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Registered: 10/16/06
Posts: 375
Loc: Ottawa, Ontario
When I am standing in front of my 2 seat leather loveseat, pointed directly at my 2 main speakers I hear plenty of really good bass and good over all sound. When I sit down on my loveseat, the perceived bass response is dramatically reduced. And the mid range becomes "nasal". I think the mid range issue is due to the reflective nature of my leather seat, as the effect is not as pronounced when I put a thick blanket over it, but the bass dissapearing is a mystery to me !! I can't figure out why ?? It must be the chair, but how can that be ? when I sit on the very edge of the chair, most , not all, of the bass is heard, but when I sit back in a comfortable fully seated position, the bass is gone ! or very thin compared to standing up or on the edge. I moved my loveseat out of the way and sat on a low back office chair. The sound did thin out a bit at my current listening position, from the room acousics, but I could still hear fairly decent bass. The chair might be the issue but I don't understand how that is and I still need to keep that chair !. Does it make a difference that I have a thin (but good) carpet glued to concrete as my basement floor where everything is setup ? Does the floor come into play here or is it just the stupid chair ? ? I'm exasperated :-(
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#322722 - 09/15/10 07:30 PM Re: Bass reduction when sitting down [Re: Riker]
fredk Offline
axiomite

Registered: 12/06/07
Posts: 7786
Loc: Canada
What happens if you shift your love seat forward or back and sit in it? Do you have the same effect?

It is possible that there is some absorption going on with your love seat, but most likely it is that your seat is located in a room null.
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#322724 - 09/15/10 07:31 PM Re: Bass reduction when sitting down [Re: fredk]
CatBrat Offline
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Registered: 08/05/09
Posts: 6015
Loc: Milky Way Galaxy
Try moving the subwoofer.

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#322733 - 09/15/10 07:57 PM Re: Bass reduction when sitting down [Re: fredk]
Riker Offline
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Registered: 10/16/06
Posts: 375
Loc: Ottawa, Ontario
Well I know that there is less bass at my listening position and I have moved the seat forward and backwards to try and fix the problem, but it has minimal impact. I think you have something though when you said the seat itself could be absorbing the bass .. I never though about that !!. When I used the office chair, which obviously did not absorb much if any bass, the bass was closer to when standing. I would not say that I sitting in a null per say, but there is less bass at that position. My point is that when standing at the same position as sitting, the bass is hugely decreased when sitting, from the same spot.
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#322734 - 09/15/10 07:57 PM Re: Bass reduction when sitting down [Re: CatBrat]
SirQuack Offline
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Registered: 01/29/04
Posts: 13572
Loc: Iowa
That is the issue with subwoofer frequencies in a room, they will differ in all locations. This is why the subject of multiple subs correctly placed comes up to even out frequencies, peaks, nulls, in all locations.
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#322735 - 09/15/10 07:58 PM Re: Bass reduction when sitting down [Re: SirQuack]
SirQuack Offline
shareholder in the making

Registered: 01/29/04
Posts: 13572
Loc: Iowa
Your head is higher when you are standing, most likely in a null of certain frequencies.
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#322737 - 09/15/10 07:59 PM Re: Bass reduction when sitting down [Re: CatBrat]
Riker Offline
devotee

Registered: 10/16/06
Posts: 375
Loc: Ottawa, Ontario
I am not using a subwoofer in this case. Just 2 channel stereo with speakers that are rated down to 30hz. If I use my subs, I can get the bass back but I am trying to figure out why it is dissapearing in 2 channel stereo mode.
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#322738 - 09/15/10 08:00 PM Re: Bass reduction when sitting down [Re: CatBrat]
Worfzara Offline
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Registered: 07/25/05
Posts: 738
Loc: London area, Ont, Canada
Sounds like you have a low freq. null, right in the worst spot possible, you fav. sofa. Like others have said, try moving your sofa, woofer, speakers, you may only have to move a few inches to get a better experience. You may even try the sub crawl.
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#322740 - 09/15/10 08:04 PM Re: Bass reduction when sitting down [Re: SirQuack]
Riker Offline
devotee

Registered: 10/16/06
Posts: 375
Loc: Ottawa, Ontario
I do have 2 subs, which I think I have placed properly, one in the front, one in the back in diagonal oposites. But in this case I am only playing 2 stereo speakers that are rated at 30hz and when standing in front of them, they really have deep bass, I sit down and .. GONE !..
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#322742 - 09/15/10 08:09 PM Re: Bass reduction when sitting down [Re: Riker]
Worfzara Offline
aficionado

Registered: 07/25/05
Posts: 738
Loc: London area, Ont, Canada
Maybe you should invest in some good head phones, sorry, just kidding.

Boy that can be annoying problem. I would still recommend moving the speakers, play with the toe or space from the back wall, or even raising them a few inches (use books or blocks, temp ofcoarse) to see if that helps.
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Axiom M80, VP180, Qs8, EP500
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