New Sub placement. Need some advise

shambles76 · 4th April 2011

Hi GS,

After many days of figuring out where to put my sub

, i finally decided to put it up (in the middle) of LR speakers

I find that this has given me a much better image! I played some commercial cd's. It sounds a lot fuller and very tight.
Also the time alignment sound tight. Cant really tell if there's a delay.
I checked by playing a sub kick and boosting the snap.

Mind you this is done purely by ears. Havent really use any software with calibration mic. I will do that soon after i figure out how to use it! Advised by Ethan Winer. I will also post the graph so i can get some help from the pro's here.

Ive included some pics, so do let me know what you think?
Also, i used a wooden box to place the sub on top. Should i get a proper speaker stand? Will it make any difference ?

Im open to any advise.
Thank you for your time

Ethan Winer · 4th April 2011

Quote:

Originally Posted by shambles76

Ive included some pics, so do let me know what you think?

Until we see response graphs it's difficult to have an opinion.

Quote:

Also, i used a wooden box to place the sub on top. Should i get a proper speaker stand? Will it make any difference ?

Again, measurements will tell you, especially waterfalls that reveal possible resonance from the wooden box itself. Hopefully the box is rigid and massive enough not to flex and rattle etc.

--Ethan

________________
The Acoustic Treatment Experts

DanDan · 4th April 2011

People who spend time recording and mixing develop hearing skills.
If it sounds good to you and if mixes sound the same in general in the outside world....Bingo.
A wooden box is likely to be causing a little trouble, unless it is very dense wood or MDF. At least stuff if full of fibre or rockwool or Ecowool, or kitty litter!
Or replace it with concrete blocks, painted or covered in fabric.
The position is interesting. You are in the middle of the width, thus not driving the first W mode well. Probably a good thing. Ditto middle height.
Lengthwise you seem to be away from the front wall a bit. Maybe even in or close to the second length null.
Interesting.
DD

tINY · 4th April 2011

By putting it in the middle of the room, you don't excite the axial mode from side to side.

By raising it, you couple less to the vertical axial node.

Putting it half-way back in the room (probably behind your head) will lessen coupling to that axial mode as well....

If your cross-over frequncy is low enough, the boundary effects in a room that small will be minimal. I assume that the walls are gypsum board over studs - which helps too.

-tINY

4th April 2011	#1
shambles76 Gear maniac Joined: Feb 2010 Posts: 153 Thread Starter	New Sub placement. Need some advise Hi GS, After many days of figuring out where to put my sub , i finally decided to put it up (in the middle) of LR speakers I find that this has given me a much better image! I played some commercial cd's. It sounds a lot fuller and very tight. Also the time alignment sound tight. Cant really tell if there's a delay. I checked by playing a sub kick and boosting the snap. Mind you this is done purely by ears. Havent really use any software with calibration mic. I will do that soon after i figure out how to use it! Advised by Ethan Winer. I will also post the graph so i can get some help from the pro's here. Ive included some pics, so do let me know what you think? Also, i used a wooden box to place the sub on top. Should i get a proper speaker stand? Will it make any difference ? Im open to any advise. Thank you for your time Attached Thumbnails

4th April 2011	#3
DanDan Lives for gear Joined: Aug 2003 Location: Cork Ireland Posts: 6,827 1 Review written	All you need is.... People who spend time recording and mixing develop hearing skills. If it sounds good to you and if mixes sound the same in general in the outside world....Bingo. A wooden box is likely to be causing a little trouble, unless it is very dense wood or MDF. At least stuff if full of fibre or rockwool or Ecowool, or kitty litter! Or replace it with concrete blocks, painted or covered in fabric. The position is interesting. You are in the middle of the width, thus not driving the first W mode well. Probably a good thing. Ditto middle height. Lengthwise you seem to be away from the front wall a bit. Maybe even in or close to the second length null. Interesting. DD __________________ www.irishacoustics.com www.soundsound.ie

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4th April 2011	#4
tINY Gear Guru Joined: Jul 2004 Location: Orygun Posts: 10,234	By putting it in the middle of the room, you don't excite the axial mode from side to side. By raising it, you couple less to the vertical axial node. Putting it half-way back in the room (probably behind your head) will lessen coupling to that axial mode as well.... If your cross-over frequncy is low enough, the boundary effects in a room that small will be minimal. I assume that the walls are gypsum board over studs - which helps too. -tINY