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Post by uchihaitachi on Aug 31, 2017 10:58:41 GMT
I've recently set up a JBL LSR305 system coupled with the LSR 310s subwoofer.
I've ran pink noise tests to check for channel imbalances etc. and thus far there seems to be no imbalance issues.
However strangely, I find that the phantom centre is deviated to the left, and a lot of the music seems deviated to the left. Is there a good way I can go about remedying this, or is there some component that I might have overlooked?
I am running the speakers balanced via the Focusrite scarlett 2i2 connected to my desktop. Thank you in advance.
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Post by arnyk on Aug 31, 2017 11:19:29 GMT
I've recently set up a JBL LSR305 system coupled with the LSR 310s subwoofer. I've ran pink noise tests to check for channel imbalances etc. and thus far there seems to be no imbalance issues. However strangely, I find that the phantom centre is deviated to the left, and a lot of the music seems deviated to the left. Is there a good way I can go about remedying this, or is there some component that I might have overlooked? I am running the speakers balanced via the Focusrite scarlett 2i2 connected to my desktop. Thank you in advance. Phantom channel ambiguity is a problem that is built into stereo when there is no real center channel speaker. It can become a problem due to spurious reflections or asymmetrical differences in room absorption. For example my listening room has an attached kitchen and dining room to the right of the wall where the speakers are mounted. The left speaker is about 5 feet from a corner to its left, and the right speaker has about 12 feet of empty space to the right of it. The corner's perpendicular wall is a pretty good reflector, but empty space is perfectly absorbent. The best solution to phantom channel ambiguity is a real center channel. The component to add to resolve this is simply another speaker that is reproducing the sum of the left and right channel feed. This is called LCR speakers and is widely used for example in sound reinforcement systems. IME it works well in general. In a full surround system, the real center channel speaker is often the most heavily used. LCR speakers can be set up at home a number of different ways. For example configuring and connecting an AVR or a smart multichannel audio card appropriately can provide the necessary channel routing and processing support for this. Or you can build or buy a simple channel mixer. |
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Post by Hexspa on Sept 1, 2017 0:11:19 GMT
Front-of-room symmetry is especially important.
Making sure your speakers are equidistant.
Making sure your desk is centered.
Making sure your speakers are at the same volume.
Making sure they're toed in correctly.
Making sure your sub isn't destructively pulling the image one way or another.
Making sure your speakers, cables and interface are functioning correctly.
Making sure any in-line mixer isn't panned or otherwise performing stereo tasks.
Making sure your hearing is basically the same in both ears.
Making sure any ambient noise in the room isn't affecting your stereo image.
Maybe a few more things...
I've always had trouble with phantom image. These are the things I've thought about and now I'm doing ok.
Thanks.
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Post by Nigel Spiers on Sept 2, 2017 0:23:09 GMT
Hi,
How about listening via headphones from the Scarlet headphone jack.
If there is no imbalance start down Hexpa's list above.
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Post by uchihaitachi on Sept 7, 2017 5:15:49 GMT
Thank you all, it seems to be my brain also readjusting to the whole headphone to speaker transition. I've done the necessary measurements, but the gear seems perfectly fine, wonderful even  . I think the culprit was my own adjustment to the stereo presentation of speakers vs headphones as well as the front of room symmetry or the lack thereof! |
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Post by Hexspa on Sept 8, 2017 0:08:21 GMT
Thank you all, it seems to be my brain also readjusting to the whole headphone to speaker transition. I've done the necessary measurements, but the gear seems perfectly fine, wonderful even . I think the culprit was my own adjustment to the stereo presentation of speakers vs headphones as well as the front of room symmetry or the lack thereof! Ya, I've noticed that it's tough to get identical phantom centers out of multiple speaker systems. Just part of working with audio I guess. Thanks. |
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Post by Ethan Winer on Sept 8, 2017 15:12:52 GMT
If you post a photo of your setup that will help a lot. Stand in the back of the room and take a wide shot toward the front, so we can see everything in context. Especially the side walls in the front part of the room extending back to where you sit.
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