Sub positioning recommendation - AVS Forum
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post #1 of 11 Old 09-09-2013, 02:54 PM - Thread Starter
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hello guys

I am in the process of changing my veteran sub with something new and wanted to get your opinion which might be the correct position to place it in my room.

My living room is as in photo and I have no available place on tv unit wall. I am thinking to put it on number 2 but wanted to make sure with your help.

I have given all metric and imperial units for the size of my room. I would really appreciate if you can also tell me what sort of a sub would suit me best


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post #2 of 11 Old 09-09-2013, 06:21 PM
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You should place the sub where it gives you the best frequency response at the main listening position.
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post #3 of 11 Old 09-09-2013, 07:13 PM
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Yeah, you really just need to place it in each spot and listen to some familiar music or movies and pick which spot sounds the best. If you have the time and equipment, then take some measurements with an SPL meter and some computer software to see the response curves, but otherwise, just do the listening and let your ears guide you.

Or... place the sub on your main seat (like straight back) and do the sub-crawl. You need to crawl around the room and pick the spot where the bass sounds loudest and most uniform across the frequency range.

Or... try a placement calculator like this: http://www.hunecke.de/en/calculators/loudspeakers.html
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post #4 of 11 Old 09-09-2013, 07:23 PM
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If you want to know for sure, get a measurement tool like REW or OmniMic.

It wouldn't surprise me if the sofa's center seat directly in front of the TV (MLP?) has some room mode problems. You may get a smoother response if you move the sofa forward a bit so it isn't dead center of the room. My WAG is that sub position #1 will work out best, but measure so you're not just guessing. Once the sub is optimally positioned, re-run whatever EQ setup routine (eg. Audyssey) that your AVR or Pre/Pro may have.

Here's a subwoofer setup article that you may find of interest:
http://nousaine.com/pdfs/Subwoofer%20Secrets.pdf
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post #5 of 11 Old 09-09-2013, 11:17 PM
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Quote:
hello guys

I am in the process of changing my veteran sub with something new and wanted to get your opinion which might be the correct position to place it in my room.

My living room is as in photo and I have no available place on tv unit wall. I am thinking to put it on number 2 but wanted to make sure with your help.

I have given all metric and imperial units for the size of my room. I would really appreciate if you can also tell me what sort of a sub would suit me best

Your current MLP is almost in a NULL no matter where you place your sub.

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post #6 of 11 Old 09-09-2013, 11:26 PM
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move the couch toward the speakers as much as you can to get as far away from the middle of the room as possible I have a similar arrangement and had absolutely zero bass in my MLP with Hugh Jass subs. I moved my couch up toward my speakers by about 8 inches. This gave me a big improvement in bass, however it strayed from the ideal triangulation with the main speakers. Solution was toe in.

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post #7 of 11 Old 09-09-2013, 11:27 PM
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and get a cross spectrum Umik and REW and some sort of manual dsp for the subs.

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Selah Prestigio Dual Epik Empires
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GR Research N2x BIC F12 Ultrasone Pro 650 Velodyne vpulse
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Wharfedale 9.6
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post #8 of 11 Old 09-10-2013, 12:33 PM - Thread Starter
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Quote:
Originally Posted by dannybenz View Post

move the couch toward the speakers as much as you can to get as far away from the middle of the room as possible I have a similar arrangement and had absolutely zero bass in my MLP with Hugh Jass subs. I moved my couch up toward my speakers by about 8 inches. This gave me a big improvement in bass, however it strayed from the ideal triangulation with the main speakers. Solution was toe in.

can you please explain why I should move couch towards the speaker and whats wrong being in the middle of the room? just trying to learn...

Emotiva XPR-5 | Marantz AV8801 | Klipsch RF-7II Front | Klipsch RF-82II Surround | Klipsch RC-52II Center | Elitescreen Vmax2 120" screen | Epson 5910 Pj | Playstation 3
On the way : Oppo 105 BRP | Klipsch RC-64II Center | Sunfire HRS-12 Sub | Emotiva XPR-2 | Klipsch SB-61II
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post #9 of 11 Old 09-10-2013, 02:20 PM
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Quote:
Originally Posted by goodkat View Post

can you please explain why I should move couch towards the speaker and whats wrong being in the middle of the room? just trying to learn...
If the reflected wave off the wall in the back of the room meets the original wave at the listening position 180 degrees out of phase there will be a cancellation at that frequency. For the subwoofer bandwidth of 20-80 Hz cancellation will occur at some frequency when the distance from that wall to the LP is between 3.5 and 14 feet.

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post #10 of 11 Old 09-10-2013, 06:24 PM
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Quote:
Originally Posted by goodkat View Post

can you please explain why I should move couch towards the speaker and whats wrong being in the middle of the room? just trying to learn...

Here's a pretty good tutorial on the topic:
http://forum.blu-ray.com/showthread.php?t=48286
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post #11 of 11 Old 09-14-2013, 06:07 AM
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Quote:
Originally Posted by henrich3 View Post

Here's a pretty good tutorial on the topic:
http://forum.blu-ray.com/showthread.php?t=48286

That's definitely a great reference site. Loads of information.
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