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Settings for 2 subs?

552 Views 7 Replies 3 Participants Last post by  LaRazaUnida
Hey everyone,

Well I have been working on a HT system for my Dad and am lacking a sub and a center speaker, thats it!


Anyways, on to the question. Currently we have a Yamaha ST215W (8inch 150wt downfire) and I wanted to get something with a little more umph...well I ended up buying a AV123 Xsub and it comes in tomorrow. :) It is 8inch 150wat downfire also.


2 Questions:


Question 1: Placement


I know, varies by every room. However, I only have one corner in the living room where the tv is, the other leads into an entrance way. Sooo, would placing each sub in between the tv and floor standers about 4in away or so from the wall be ok? I know, best way to check is to use spl meter (dont have yet.).


Question 2: Actual Set Up


I have read of people running both subs at the same time and I have also heard of people running one sub to say about 40hz and letting the other take care of the lower stuff. What would you guys suggest to be good advice? Run them together, or let the yammy take care of 40hz and above and the xsub take care of the lower. I want the most rattle and sub feel possible, so I thought running them both at the same time would be best....


One last thing, if running one at a certain hz and the other for the lower end, how do I adjust them? With the knob on the back correct that states the frequenies?



Thanks alot guys for any help. I hate posting a thread like this, but was kind of confused a little.
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Quote:
Originally Posted by LaRazaUnida
I know, varies by every room. However, I only have one corner in the living room where the tv is, the other leads into an entrance way. Sooo, would placing each sub in between the tv and floor standers about 4in away or so from the wall be ok? I know, best way to check is to use spl meter (dont have yet.).
Only real way to know is to experiment. That's half the fun anyway. :D


What you propose sounds ok, I've seen it done that way before. Depends on the room. Another option that some swear by is to put them at mirror image points. Such as along the side walls, one sub on each wall in the center of the wall. Or use the front and rear walls if you can.

Quote:
I have read of people running both subs at the same time and I have also heard of people running one sub to say about 40hz and letting the other take care of the lower stuff. What would you guys suggest to be good advice? Run them together, or let the yammy take care of 40hz and above and the xsub take care of the lower. I want the most rattle and sub feel possible, so I thought running them both at the same time would be best....
Well, that depends. The basic idea (usually) with running them at seperate ranges is that you've got a "good" sub and a big, noisy one that plays real low. You cross them over at about 35 hz, since that's where most human hearing falls off. The good sub plays the audible frequencies, and the big one handles the really low stuff just for added rumble. Again, something to experiment with. Getting two subs working well together is tricky. You've got a new hobby. :D

Quote:
One last thing, if running one at a certain hz and the other for the lower end, how do I adjust them? With the knob on the back correct that states the frequenies?
It's either that or use some bass controller box that can do it.


Your problem will be the sub that is plays the higher frequencies. You need two filters on that one. The knob on the back will simply set low pass filter to keep the sub from playing any higher than the setting. (Not exactly, but that's the idea) You also need a high pass filter, to roll off the sub at the point where it hands off to the other sub. The really low sub can just use it's own low pass as usual, just set really low.


You can probably find an inline high pass filter that plugs into the subs input jack. That's the really simple solution, but probably the best fix is to use some bass controller that has the options you need.
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Originally Posted by WallyWest
What you propose sounds ok, I've seen it done that way before. Depends on the room. Another option that some swear by is to put them at mirror image points. Such as along the side walls, one sub on each wall in the center of the wall. Or use the front and rear walls if you can.
Well one center wall is taken up by a fire place and there is no rear wall because it runs into the kitchen :eek:


Quote:
Originally Posted by WallyWest
You've got a new hobby. :D
Thats the truth!! Now I have two hobbies, rotaries and audio :)


Thanks alot for your advice :D
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:(

Well, I was anxiously awaiting my Xsub and it came in today.


Well I plug it in and am in complete smiles. The bass sounds really sharp and sounds good. So I decided to hook up the two subs via a y cable....


Sounds really good together! Then I want to test them out seperately..


The yammy has the ability to make me feel it in my feet a little bit while the xsub does not. The Yamaha also plays quite a bit louder than the xsub. Albiet, when the yamaha is at full gain, the port noise and distortion makes it awful.


But I keep the Yamaha at about 60% and tryd the xsub at the same. Just couldnt hang. The Xsub hasnt made any rumble to my feel even when all the way up.


Is there something wrong with the settings? I have placed the xsub where the yamaha was, placed it in the corner, every where but the Yamaha still plays and hits harder. Now, the yamaha does not go nearly as low or sound as smooth, but its sometimes harder to hear the sound of the xsub.


I have thought about returning it, but I am not able to correct since it is a bstock? Maybe should of gone with something bigger all together. Any advice?


I currently have my reciever crossing over at 80hz and the xsub is connected via the subwoofer lfe input instead of the L and R.


The yamaha has only the L and R.(both are plugged in with a y cable)


Also, the Yamaha has a High Cut knob on the front and it is placed to 150hz(as stated by the manual). I think this may be the main reason that it seems to play louder and harder, because when I turn it down then they get to be about even.
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I currently have my reciever crossing over at 80hz and the xsub is connected via the subwoofer lfe input instead of the L and R.


The yamaha has only the L and R.(both are plugged in with a y cable)
Do you have your speakers set to small when you hook up the xSub? Also, are you sure the LFE is set to "On" in the receiver setup?
I have all speakers set to small and the LFE is set to on. I mean, the bass is cleaner on the xsub, but I wish it would go louder or atleast feel a little thd when I am close to it. I will get an spl meter and avia next week.
Well,

I think I am just going to return the sub. Sucks that I am going to lose over $80 from shipping. I want to get something that will make some rattle and roll. Right now I am thinking a SVS 25-31PCi ... :(
WOW, this thing just needed to be broken in. I had some pictures start to rattle and a cd fall off of the shelf...Im keeping this thing and planning to get another later down the road :D
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