On one Vs multiple subs

[GeorgeO]

Login

 

[gobble]

George,
The link does not work. But in my case after some trial and error, I decided that the sub crossover is best around 64 to 70hz. So why would one need two subs when the optimal setting is below 80hz? I think two subs are only required with small speakers that sound thin or lack punch in upper bass 80-120hz range.

--G

 

[HTuser]

As per my understanding, it is difficult to get same level of low frequency sound throughout the room using single subwoofer. The level will be high in some places and low in some other places.

If two or more subs are there, it will be possible to get more even low frequency sound in most of the places in room - by proper placement and calibration.

 

[Flash]

George,
The link does not work. But in my case after some trial and error, I decided that the sub crossover is best around 64 to 70hz. So why would one need two subs when the optimal setting is below 80hz? I think two subs are only required with small speakers that sound thin or lack punch in upper bass 80-120hz range.

--G

multiple subs takes care of room modes . and will give you a flatter response throughout the room .

 

[2chFreak]

multiple subs takes care of room modes . and will give you a flatter response throughout the room .

preferably a PAIR of Subs (not multiple) and can be set out of phase with one another too

Subwoofer champion REL always recommended this but users seldom applied due to the cost of the product

 

[Flash]

preferably a PAIR of Subs (not multiple) and can be set out of phase with one another too

Subwoofer champion REL always recommended this but users seldom applied due to the cost of the product

True .... But 4 subs placed at opposing corners of the room would be perfect. Atleast for me.

 

[GeorgeO]

Login

 

[GeorgeO]

Sorry looks like you need to register at Audio Crcle to read it..

 

[anm]

I was advised by Danny @ GR Research and Kanwarji on this forum to keep two subs on top of each other instead in stereo position. I think that is for maximizing SPL, vs making room response even. It would be good if more people can join this discussion.

4 subs require substantial space at house. Either run wiring before plastering, or would require use of wifi. If the wifi is out of sync, then there are more issues. I can't keep 4 subs in my living room

 

[kanwar]

I was advised by Danny @ GR Research and Kanwarji on this forum to keep two subs on top of each other instead in stereo position. I think that is for maximizing SPL, vs making room response even. It would be good if more people can join this discussion.

Stacking the multiple SUBs next to each other results not only in higher SPL but also flatter and uniform frequency response with much more extension in lower octaves and in this way you eliminate phase errors and empty lobes.

 

[purna]

Anybody tried comparing two average quality sub-woofers vs one good quality sub-woofer in the similar price range.

Some articles on the net say two average quality sub-woofers perform better. I would like to know experts opinion.

I was thinking whether to go for SVS PB12/PC12 NSD or Polk DSW660 Pro for my setup. For the cost of one SVS PC12/PB12, one can get two DSW660/550 Pro and can make 5.2 or 7.2 system. Is the SVS PB12 still outperform two DSW660/550s?

 

[ranjeetrain]

Two Subs can be used in various ways to achieve desired results. However, one sheer performance basis, one more expensive sub can bring qualitative changes that two average subs can't achieve together.

In the case of SVS PB12 vs a DSW pair, the SVS will outperform the Polks (on a sheer loudness basis). However, that doesn't guarantee the SVS will integrate as well as the Polks in a particular setup.

So, define "better" for yourself. What does better mean? Does it mean "louder"? Does it mean "tighter"? Does it mean "lower"? Does it mean "better definition"? That would be a better way to find the answer.

Anybody tried comparing two average quality sub-woofers vs one good quality sub-woofer in the similar price range.

Some articles on the net say two average quality sub-woofers perform better. I would like to know experts opinion.

I was thinking whether to go for SVS PB12/PC12 NSD or Polk DSW660 Pro for my setup. For the cost of one SVS PC12/PB12, one can get two DSW660/550 Pro and can make 5.2 or 7.2 system. Is the SVS PB12 still outperform two DSW660/550s?

 

[arj]

Stacking the multiple SUBs next to each other results not only in higher SPL but also flatter and uniform frequency response with much more extension in lower octaves and in this way you eliminate phase errors and empty lobes.

thanks kanwar. but wont the room nodes be accentuated ? one theory I heard was that keeping it at opposite corners actually cancels out standing waves/room nodes. is that true?

 

[manoj.p]

Room plays a big factor in sub 100 hz frequencies. What we hear is mostly the room, meaning we hear the sound as modified by the room. It varies from place to place in the room. if you want good quality of sub 100 hz sound, besides louder, tighter, cleaner bass, we need following two:

• Flat response, ideally from 20 Hz to 80 Hz.
• Same response from multiple seats

sometimes, a sub is great, but if the room is causing some nulls, a sub can't do anything about it, other than eq. Most subs come with a single eq filter which can work with only one frequency point. What if more than one is needed? also, whatever digital eq is doing is making it worse at some other location. We will have to use some room absorption to take of the nulls. But then the sub has to work harder because some of its energy is getting absorbed and the room has now become dull. Other approach is to use multiple subs. Now, there have been made so much tests about it and the results are out there.

A good read is this article. Low Frequency Room Acoustic Optimization

 

[kanwar]

thanks kanwar. but wont the room nodes be accentuated ? one theory I heard was that keeping it at opposite corners actually cancels out standing waves/room nodes. is that true?

You cannot cancel out the standing waves entirely, even if you place the subs at each corner because the lobes will still form and the room gain has significant role in it. Theoretically, Four subs in four different places leaves no dead spots for bass but this seldom happens because of other things present in the rooms such as furniture etc.

By keeping the subs stacked to each other and at front of listener helps you in getting uniform response as far as near field-listening is concerned.

 

[Nikhil]

A good read is this article. Low Frequency Room Acoustic Optimization

Very interesting reading ... CFD analysis is some serious stuff!!

 

[GeorgeO]

One question i have relates about how to sire up(connect) more than one sub, with a single sub out jack on my prepro. Does one 'daisy chain" the subs, using the same signal?

 

[kanwar]

One question i have relates about how to sire up(connect) more than one sub, with a single sub out jack on my prepro. Does one 'daisy chain" the subs, using the same signal?

If you have single mono sub out, then daisy chain is way to go.