Re: Bass reduction when sitting down
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Joined: Jul 2005
Posts: 738
aficionado
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aficionado
Joined: Jul 2005
Posts: 738 |
What bothers me the most is that the speakers have plenty of bass where they are currently located, but In order to bask in that wonderfull bass, I would have to sit 3 feet in front of them, which is not practical. I am not sure that moving the speakers would help since they sound really good where they are, except when I sit down on my loveseat, the bass is greatly reduced. What I will try this afternoon or tonight is to remove my seat completely and try a combination of different chairs at the same location, then move the chair that sounded the best backwards and forwards until I find the best sound. If that does not yield good results, then I will flip the room around 180 and see what effect that has.
These are brand new speakers that I got a week ago and in every respect they are superior to my previous pair. The previous pair had considerably less bass capabilities so I had to run them with the Subwoofers all the time, otherwise it sounded way to thin. But these new ones have really good bass for small drivers. It is a transmission line design with under hung drivers, similar to Thiel and Wilson. The bass out of these is of sufficient enough quantity and quality that I don't need a subwoofer engaged to hear good music. On movies, well the subs are obviously on.
Well, If you only get bass sitting 3 feet away from them, it doesn't matter how good the bass is. I mean to me, it only matters to me how good a speaker sounds at my listening position.
paul
Axiom M80, VP180, Qs8, EP500 Epson 3020 Rotel RB-880 Denon AVR-990
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Re: Bass reduction when sitting down
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Joined: Dec 2003
Posts: 10,420
shareholder in the making
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shareholder in the making
Joined: Dec 2003
Posts: 10,420 |
You should have bought M80's, they are magical and would solve all your problems Looking forward to your results, very puzzling situation.
Jason M80 v2 VP160 v3 QS8 v2 PB13 Ultra Denon 3808 Samsung 85" Q70
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Re: Bass reduction when sitting down
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Joined: Aug 2004
Posts: 6,379 Likes: 7
axiomite
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axiomite
Joined: Aug 2004
Posts: 6,379 Likes: 7 |
Fred, I was using about 30" sitting and 60" standing. Certainly not enough below or above mode minimum to explain anything like the reported bass effect, but I mentioned it. I'm a bit taller than average but the numbers I use are 72" standing and about 54" sitting. With an 8 foot ceiling and bass source 6" off the ground (Riker, how far off the ground is the port ?) then that would put my ears right at the null when sitting (I think). Presumably turning up the volume would make the bass come out a bit further from the speakers before falling to the ground, but I'm sure someone has already mentioned that
Last edited by bridgman; 09/16/10 03:48 PM.
M60ti, VP180, QS8, M2ti, EP500, PC-Plus 20-39 M5HP, M40ti, Sierra-1 LFR1100 active, ADA1500-4 and -8
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Re: Bass reduction when sitting down
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Joined: Jun 2003
Posts: 8,488
axiomite
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axiomite
Joined: Jun 2003
Posts: 8,488 |
You're sitting in a bass null. You have to move the speakers or the listening position a bit. Simply pulling them out from the wall and extra 3-4" might even do it.
bibere usque ad hilaritatem
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Re: Bass reduction when sitting down
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Joined: Oct 2006
Posts: 375
devotee
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OP
devotee
Joined: Oct 2006
Posts: 375 |
Hi guys, some measurements:
The port on the Adagios is on the Front of the speaker, 4" from the ground, 2 1/2" high and 7 " wide (rectangle port) No ports in the back. Transmission line design.
The speaker is 48" tall (49" with the plinth and spikes), 13 1/2" deep, 9" wide at the front then tapers down to 4 1/2" in the back. Similar to the M80s tappered cabinet design.
The first 6 1/2 driver is 31 1/2" (center of cone)from the floor.
Next is the tweeter which is 38" from the floor (center of cone)
Then the other 6 1/2 driver which is 45 1/2" from the floor (center of cone)
Measurements from wall surfaces are taken from the walls to the center of the speaker cabinet.
Right speaker is: 26 1/2" from back wall and 23 1/2 from side wall.
Left speaker is: 26 1/2" from back wall and 9 ft from side wall.
Now, I'm going to move some furniture / chairs and see what I can come up with. Will report later the afternoon on my findings. Cheers
Last edited by Riker; 09/16/10 05:30 PM.
Acoustic Zen Adagio, Veritas center, Axiom EP500, QS8s, Anthem AVM20, MC20,Adcom GFA7400
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Re: Bass reduction when sitting down
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Joined: Aug 2004
Posts: 6,379 Likes: 7
axiomite
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axiomite
Joined: Aug 2004
Posts: 6,379 Likes: 7 |
I bet you're losing the port output when you sit down
M60ti, VP180, QS8, M2ti, EP500, PC-Plus 20-39 M5HP, M40ti, Sierra-1 LFR1100 active, ADA1500-4 and -8
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Re: Bass reduction when sitting down
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Joined: Jun 2003
Posts: 8,488
axiomite
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axiomite
Joined: Jun 2003
Posts: 8,488 |
Just tilt a little to one side like Ray.
bibere usque ad hilaritatem
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Re: Bass reduction when sitting down
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Joined: Oct 2006
Posts: 375
devotee
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OP
devotee
Joined: Oct 2006
Posts: 375 |
Well I think I have NULLIFIED the issue I tried moving the speakers to the other side of the room, where the sitting area was, and that gave me more bass but the rest of the sound was terrible. It was worth a try. I put the speakers back where they were except much further out from the back wall. They are now 38" from the back wall to the front of the speaker. The biggest change was moving my loveseat completely up against the back wall .. Voila.. instant bass with no compromise on overall sound quality. I still have to put up a few acoustic panels on the wall behind the seat just to clean up the high end a bit, but it sounds very good from there. My seat was initialy 4 feet from the back wall as I was observing this 3rd of the room "rule" where the listening position needs to be somewhere around 1/3rd of the lenght of the room.. or something like that. It works great for tv viewing, surrounds are in nice position etc.. but with the new speakers it sounds MUCH better with the couch right up against the back wall. Now my QS8s are actually slightly in front of my head.. But I don't think this will be a huge problem, the QS8s are very forgiving in placement. Now the only issue is my 46" tv looks to SMALL from that distance .. Ah well, I guess that means I need a 60" TV then Thanks everyone for the very helpful sugestions and ideas.. Cheers
Acoustic Zen Adagio, Veritas center, Axiom EP500, QS8s, Anthem AVM20, MC20,Adcom GFA7400
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Re: Bass reduction when sitting down
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Joined: Jul 2009
Posts: 282
local
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local
Joined: Jul 2009
Posts: 282 |
We have a winner ! It took me about 3 months to figure and find the best location to all my speakers. Many changing position and listening test. Glad you find your setup. I bet you will move everything again soonly just to test once again if you right
Last edited by Philippe; 09/16/10 09:14 PM.
Nad C356 DAC & C515 Axiom M3v3 Grant Fidelity RPF-120 MKII Analysis Plus Black Oval 12&10 JRiver 19
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Re: Bass reduction when sitting down
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Joined: Oct 2006
Posts: 375
devotee
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OP
devotee
Joined: Oct 2006
Posts: 375 |
The next move will be to make room for new Home Theater Seating which I am going to procure next spring. Then a new bigger tv.. but I think the speakers should stay relatively where they are and so is the seating position.
But hey, never say never !! LOL..
Acoustic Zen Adagio, Veritas center, Axiom EP500, QS8s, Anthem AVM20, MC20,Adcom GFA7400
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