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Go Back   Blu-ray Forum > Audio > Subwoofers


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Old 08-15-2014, 04:29 AM   #241
datlocolatino datlocolatino is offline
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Im picking up one of the sa-wm40's tomorrow and im gonna do this over the weekend. Im interested in seeing the difference.
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Old 10-11-2014, 05:27 AM   #242
liquidice liquidice is offline
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Soooooo, should I actually be setting my l/r mains as "large" in the amp due to the fact they have passive radiators?
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Old 10-11-2014, 06:58 AM   #243
Nick The Slick Nick The Slick is offline
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Quote:
Originally Posted by liquidice View Post
Soooooo, should I actually be setting my l/r mains as "large" in the amp due to the fact they have passive radiators?
Short answer - no, not really.

Long answer - If you have a subwoofer, it's generally best practice to set your speakers to small and just let the sub handle all low frequencies. The best way I can explain why is as follows: The subwoofer location can vary (restricted only by where in your room you can fit it without it being in the way) whereas the mains pretty much have a fixed location, determined by setting them a certain distance apart (equal to the distance they are from the listening position if you are able to follow that guideline to the T). This is a big deal because of the way bass interacts with the room (room modes). The best place(s) to place a subwoofer in your room to get the smoothest, most accurate bass response is hardly ever where your mains will be placed. If you let your mains handle the low frequencies, you will most likely get all sorts of peaks/nulls at the listening position due to interactions with the room modes (even worse is if the two mains are different distances from the boundaries, meaning each of them will be interacting with the room modes differently, causing even more of a mess). Not to mention you'll run into phase cancellation issues between the two mains and the sub (if you allow both to play the low frequencies). I would personally only recommend setting the mains to large if/when you use them for 2 ch. music and you want to hear it without bass management and the subwoofer.
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Old 01-16-2015, 08:08 PM   #244
cleanfreak cleanfreak is offline
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Originally Posted by Big Daddy View Post
If your receiver has adjustments for crossovers, you should let it control all the crossovers. By turning the crossover dial on the back of the subwoofer all the way up to its maximum point, you are taking it out of the equation and let the receiver control everything. By doing this, the subwoofer can accept all frequencies that the receiver is sending to it. You should do the following:[LIST=1][*]Turn the crossover dial on the back of the subwoofer all the way up to its maximum point.[*]Turn the level on the back of the subwoofer to around 50%. You can adjust it a little later.[*]Place your subwoofer up front in a corner about a foot or so away from the side walls.[*]In the receiver's menu, make sure all speakers and the subwoofer are set to YES.[*]In the receiver's menu, set all speakers to SMALL.[*]In the receiver's menu, set the crossover (high pass filters) for the speakers to 80Hz. Check the manual for your speakers. Make sure the crossover settings for the speakers are at least 10Hz to 20Hz above the minimum +/-3dB frequency ratings of the speakers.[*]If your receiver offers a separate crossover option for the subwoofer (low pass filter of LFE), set it to 120Hz.
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Greetings-
I originally set up my speakers using the 'auto setup' mode in my Denon S500BT. This set up produced a nice sound, but I noticed it did not match the settings in this post.
Using the manual set up feature, I changed all the settings according to this post and now I do not have any bass coming from my subwoofers ( I have two). The subwoofers will not even act like they are receiving a signal.
I reset my Denon back to factory default and used the 'auto set up' and my subwoofers are now working again.

Any thoughts on where I went wrong?

Thanks for the help.
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Old 01-18-2015, 03:43 PM   #245
cleanfreak cleanfreak is offline
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Anybody?
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Old 01-18-2015, 04:28 PM   #246
Starkscream Starkscream is offline
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Quote:
Originally Posted by cleanfreak View Post
Greetings-
I originally set up my speakers using the 'auto setup' mode in my Denon S500BT. This set up produced a nice sound, but I noticed it did not match the settings in this post.
Using the manual set up feature, I changed all the settings according to this post and now I do not have any bass coming from my subwoofers ( I have two). The subwoofers will not even act like they are receiving a signal.
I reset my Denon back to factory default and used the 'auto set up' and my subwoofers are now working again.

Any thoughts on where I went wrong?

Thanks for the help.
What did you mean by the bolded section?

Asking because if the auto setup has all your speakers working, then the only manual settings you would change would be minor tweaks to individual speaker levels, maybe distance if it wasn't accurate.
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Old 01-19-2015, 02:12 PM   #247
cleanfreak cleanfreak is offline
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Originally Posted by Starkscream View Post
What did you mean by the bolded section?

Asking because if the auto setup has all your speakers working, then the only manual settings you would change would be minor tweaks to individual speaker levels, maybe distance if it wasn't accurate.
Thanks for the reply.

The auto setting set one of my front speaker to LARGE and it also set my subwoofers to LFE+Main.

When I set all my speakers to SMALL and the subwoofers to LFE only, the subwoofers no longer worked.

I will try again this afternoon.

thanks again.
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Old 01-19-2015, 09:12 PM   #248
Starkscream Starkscream is offline
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Originally Posted by cleanfreak View Post
Thanks for the reply.

The auto setting set one of my front speaker to LARGE and it also set my subwoofers to LFE+Main.

When I set all my speakers to SMALL and the subwoofers to LFE only, the subwoofers no longer worked.

I will try again this afternoon.

thanks again.
That's really interesting. Make note of where the crossovers are set for your speakers and your subwoofers. Maybe there's a discrepancy there.
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Old 04-01-2015, 09:42 PM   #249
sinister184 sinister184 is offline
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Default A Guide to Subwoofers (Part I): Characteristics, Placement, & Adjustments

So maybe it has more to do with room acoustics, but what is the proper way to address not hearing the sub as well in a particular spot?
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Old 04-01-2015, 09:55 PM   #250
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Originally Posted by sinister184 View Post
So maybe it has more to do with room acoustics, but what is the proper way to address not hearing the sub as well in a particular spot?
I would suggest the "subwoofer crawl." Search here or the Internet, you'll find many how-tos. Briefly, you set the subwoofer in your primary listening position, then move about the room while running test sounds/tones, crouching so your ears are about level with listening height. The spot where the bass is most audible, that's where to place the sub.

Or are you saying there's a null somewhere in the room other than the primary listening position? That might be more of a challenge, probably remedied by a dual sub configuration (which many recommend).
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Old 04-01-2015, 11:29 PM   #251
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Quote:
Originally Posted by ChromeJob View Post
I would suggest the "subwoofer crawl." Search here or the Internet, you'll find many how-tos. Briefly, you set the subwoofer in your primary listening position, then move about the room while running test sounds/tones, crouching so your ears are about level with listening height. The spot where the bass is most audible, that's where to place the sub.
Thanks! I hadn't heard of that before but that seems like what needs to be done. I'll give it shot. Now ill have to explain to my wife why there's a sub randomly placed in the living room
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Old 10-14-2016, 05:18 PM   #252
klaudyuxxx klaudyuxxx is offline
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Hi,
I'm having some issues with bass cancelling.
I have a 2.0 active system and a separate active subwoofer. I can't change the polarity to either of them, except the left speaker of the 2.0 system.
The subwoofer has an RCA mono input line. I was wondering if changing the polarity of the connecting cable would do the trick? The cable is a jack 3.5 > RCA connected to a 7.1 soundcard.
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Old 11-25-2017, 12:55 AM   #253
Indyjones Indyjones is offline
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I need some input. I just ordered a 75Ē Sony 4K TV a few days ago to replace my 61Ē DLP RPTV. Because of the size of the new TV, Iím going to have to push my mains out more. My problem is, I donít have sufficient enough space to do so. My TV, right main, and one of my subs will literally be touching one another. Because of this, I wonít even be able to toe my mains in to the listening position.

My question is, do I need to have a sub up front? Will I encounter any performance issues if I move it to the back with my other sub and place it in the opposite corner? If Iím able to put both of my subs in the back, that would free up a lot of much needed space up front. My subs are 17Ē wide. Iíve tried doing a side wall placement with my subs before when I first set it up, but the subs didnít perform as well as they do in the corners. My room is roughly 11í x 13í.
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Old 11-25-2017, 04:24 AM   #254
Steve Steve is offline
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Quote:
Originally Posted by Indyjones View Post
I need some input. I just ordered a 75Ē Sony 4K TV a few days ago to replace my 61Ē DLP RPTV. Because of the size of the new TV, Iím going to have to push my mains out more. My problem is, I donít have sufficient enough space to do so. My TV, right main, and one of my subs will literally be touching one another. Because of this, I wonít even be able to toe my mains in to the listening position.

My question is, do I need to have a sub up front? Will I encounter any performance issues if I move it to the back with my other sub and place it in the opposite corner? If Iím able to put both of my subs in the back, that would free up a lot of much needed space up front. My subs are 17Ē wide. Iíve tried doing a side wall placement with my subs before when I first set it up, but the subs didnít perform as well as they do in the corners. My room is roughly 11í x 13í.
No you don't necessarily need either of your subs up front. However, it's impossible to know how everything will sound together in your room until you move it to the back and try it out. I have both of mine in the back and they're working well together, but I did recently add a miniDSP 2x4 to my system to improve how they perform in my living room.
Steve
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