Previous Thread
Next Thread
Print Thread
Rate Thread
Page 2 of 8 1 2 3 4 5 6 7 8
Re: Where to place additional subs?
SirQuack #192301 01/15/08 03:42 AM
Joined: May 2002
Posts: 10,654
shareholder in the making
Offline
shareholder in the making
Joined: May 2002
Posts: 10,654
Randy, one on the back wall and one on the side wall wouldn't generally be the idea. Middle of both side walls or front and back walls work to minimize the effect of room modes by being located at points where some modes are at a minimum(middle of the wall)and tending to cancel other modes by being opposite each other where those modes are in opposite phase.


-----------------------------------

Enjoy the music, not the equipment.


Re: Where to place additional subs?
JohnK #192302 01/15/08 03:46 AM
Joined: Jan 2004
Posts: 13,840
Likes: 13
shareholder in the making
OP Offline
shareholder in the making
Joined: Jan 2004
Posts: 13,840
Likes: 13
Thanks JohnK,

Yes, I am planning on putting my 600 below my center screen on the front wall, and then get another sub for the rear wall next to the walk out door. What do you think would happen if I added a 3rd sub for the left wall? I would think 3 might be a little better than 2. Or I could put a 350 near each corner of the back wall.


M80s VP180 4xM22ow 4xM3ic EP600 2xEP350
AnthemAVM60 Outlaw7700 EmoA500 Epson5040UB FluanceRT85


Re: Where to place additional subs?
SirQuack #192307 01/15/08 04:11 AM
Joined: Dec 2003
Posts: 10,420
J
shareholder in the making
Offline
shareholder in the making
J
Joined: Dec 2003
Posts: 10,420
Well Ian had said 4 subs is nearly ideal so 3 would be 3/4 to ideal. I would think the other 2 2/3 of the way down the side walls would work. You could also try one 1/2 way down and the the other all the way to the back just see which works better in your situation. After all it is about building up the low points so positioning is the key.

I think you are going to need to do some work once you get them. It is all just speculation until they are installed.


Jason
M80 v2
VP160 v3
QS8 v2
PB13 Ultra
Denon 3808
Samsung 85" Q70
Re: Where to place additional subs?
SirQuack #192314 01/15/08 04:28 AM
Joined: May 2002
Posts: 10,654
shareholder in the making
Offline
shareholder in the making
Joined: May 2002
Posts: 10,654
Although a third sub at that location would increase the overall sound level, it wouldn't have the mode minimizing effect that two at the middle of opposite walls have. I'd stay with two of the best possible(if you don't go to four....etc.).


-----------------------------------

Enjoy the music, not the equipment.


Re: Where to place additional subs?
JohnK #192348 01/15/08 01:46 PM
Joined: Oct 2005
Posts: 853
aficionado
Offline
aficionado
Joined: Oct 2005
Posts: 853
While its true that the greatest change in flattening nodes occurs when adding the first sub, adding subsequent subs also contributes to smoothing nodes, as well as increasing headroom and lowering distortion. I found that going to 3 from 2 subs further improved FR but required tweaking placement and phase again in all the subs.

The Harman study does provide idealized locations but the exact location in Randy's room will be influenced by the location of his furniture and its slightly irregular shape. That's why the SMS-1 mic technique makes finding the ideal placement a snap.

It also seems to me that if there ever was a case to be made for colocating a pair of subs, its Randy's huge room. One alternative is to colocate a pair of 350v3s for an extra 6db output from coupling. A pair setup that way would provide max SPL of 113 anechoic, 124 db in room \:o according to the Axiom stats. Along with the 600 that should give give you enough woofage for that 9000cf space and still give you some benefit of smoothing FR.


John
Re: Where to place additional subs?
jakeman #192350 01/15/08 02:11 PM
Joined: Feb 2005
Posts: 5,210
axiomite
Offline
axiomite
Joined: Feb 2005
Posts: 5,210
Can somebody refresh my memory, what is the difference between the EP350 and the new EP350v3?


Rick
Our Room

smile
Re: Where to place additional subs?
RickF #192371 01/15/08 04:18 PM
Joined: Oct 2006
Posts: 6,955
axiomite
Offline
axiomite
Joined: Oct 2006
Posts: 6,955
I may be oversimplifying but if the main benefit of two subs on opposing walls is wave cancellation of the room modes caused by reflections resonating after the first direct sound was heard.... would this improvement be mostly negated by large items of furnature between two opposing subs. A couch for instance?

I think the answer is Yes as evidenced by the fact in these example rooms and graphs, the furniture was always shifted in the example pics to allow the subs to have line of sight to each other, when used in opposing configuration.

Hearing things is hard work....

Example rooms and graphs.


With great power comes Awesome irresponsibility.
Re: Where to place additional subs?
RickF #192384 01/15/08 05:47 PM
Joined: Oct 2007
Posts: 395
devotee
Offline
devotee
Joined: Oct 2007
Posts: 395
 Originally Posted By: RickF
Can somebody refresh my memory, what is the difference between the EP350 and the new EP350v3?



The new 350 now uses the EP500 cabinet and is 300 watts, up from 200(?). It also has a "nifty" circuit for extra bass output.


M80s/VP160/QS8s/EP350; M22s; M3s.
Re: Where to place additional subs?
doormat #192386 01/15/08 05:50 PM
Joined: Feb 2005
Posts: 5,210
axiomite
Offline
axiomite
Joined: Feb 2005
Posts: 5,210
Thanks Mark, the reason for the question is that I had a ponder to drag the old 350 out and connect it up with the 600 ... don't know if that would work or not. Seems like somebody (Brent?) told me it would not be a good combination some time back.


Rick
Our Room

smile
Re: Where to place additional subs?
RickF #192388 01/15/08 05:53 PM
Joined: Oct 2007
Posts: 395
devotee
Offline
devotee
Joined: Oct 2007
Posts: 395
I believe it was framer2180 who has both versions. Try PMing him as to the actual acoustical differences.


M80s/VP160/QS8s/EP350; M22s; M3s.
Page 2 of 8 1 2 3 4 5 6 7 8

Moderated by  alan, Amie, Andrew, axiomadmin, Brent, Debbie, Ian, Jc 

Link Copied to Clipboard

Need Help Graphic

Forum Statistics
Forums16
Topics24,940
Posts442,457
Members15,616
Most Online2,082
Jan 22nd, 2020
Top Posters
Ken.C 18,044
pmbuko 16,441
SirQuack 13,840
CV 12,077
MarkSJohnson 11,458
Who's Online Now
0 members (), 386 guests, and 4 robots.
Key: Admin, Global Mod, Mod
Newsletter Signup
Powered by UBB.threads™ PHP Forum Software 7.7.4