Using subwoofer as center channel stand.

[ZIPPO]

or use these: http://www.auralex.com/sound_isolati...eakerdudes.asp

[Aerodude73]

Originally Posted by ZIPPO

or use these: http://www.auralex.com/sound_isolati...eakerdudes.asp

lol - this makes the Third () time these were posted. One above mine, then my post for the Amazon link, now yours.

[js666]

Thanks guys. The glass of water is a good idea. I'll try it tonight and post my findings.

I'll definitely have something under the center. Since the CS4 is curved, I have the cradle that supports the speaker. Did wonder briefly about putting a speaker on such a nice sub.

[Rob J in WNY]

Love your setup, js666. One of the most elegant gear selections have seen on these forums.

Indeed, if your resonance test proves to show vibration on the surface (it is a Fathom sub, after all ), then I would avoid placing the center channel on top of it. Yours is a discerning setup, and no doubt you have come to have discerning ears. If the center channel is subject to vibration, then this can induce coloration in its sound output.

Happy testing! Can't wait to read your results!

[js666]

OK, I did the coin on it's side and water test. There is some vibration on top of the cabinet. Played T:Salvation, the coin dropped in one of the louder scenes during the Harvester attack.
Is it reasonable to expect a little vibration? I just can't imagine the Dali sub having less vibrations than the JL Audio. I know the only way I'll really know is to just try it but it's a pain placing a 120 lb sub on and off the cones by myself.

[FreddieFerric]

Originally Posted by js666

...Is it reasonable to expect a little vibration?...

Absolutely! The amount of travel in the woofer and the amount of air it moves has to result in some vibration through the cabinet. Still, with a reasonable amount of thought, you should be able to fashion a solution that also accomplishes what you want. Good Luck!

[js666]

Did this to test ....



Strangely enough, the coin didn't topple over during the same scenes. I'm guessing the center provided extra dampening to the sub. Still noticed the coin wobble but the dialogue was just as natural.

[Thunderchildga]

Speakers are essentially acting like horns. think of the early wind-up Victrolas that had large horns coming from the arm that held the needle and the diaphram it vibrated. Also think of the early 20th Century Vaudville entertainers like Rudy Vallee using a Megaphone to amplify their voices.

Klipsch (with his Klipschhorn) and Bose (with his series 901) extended this concept by telling their customers to place their speakers in exacting locations so the walls of the room would act as a continuation of the speakers "horn".

The normal suggested placement of a subwoofer is usually a few inches or so from a corner of the room. This is so the bass will resonate out of the "V" of the corner and naturally increase as sound does as it passed through a horn. Since bass is ominidirectional, you can't really tell where it is coming from in a standard-sized room, so this set-up is generally aknowledged as the optimal placement.

But with that said, the optimal set up for you is ultimately dependent on your taste and preference. I'd say place the speaker where you want it to be, then have a good listen. If you like it, then go with it. If the bass is a bit less than you like, perhaps you can adjust the subwoofer to suit your taste, otherwise try another location until you hit upon the right placement that suits your taste.

[js666]

Was able to borrow a buddy's SMS-1 for a few days to take a reading of my room.
Thought I'd post a few pics of room measurement before and after EQ.
Sub x-over set at 60hz.

Here is the response with new sub position, no EQ. Not bad at all...


After minor tweaking on the Classe PEQ. Wasn't bad before but this is pretty damn flat!

[rpatt]

Wow, that is really flat. I recently bought an SMS-1 but haven't had a chance to use it yet. I hope I can get a similar result.

[Fors*]

Originally Posted by js666

Was able to borrow a buddy's SMS-1 for a few days to take a reading of my room.
Thought I'd post a few pics of room measurement before and after EQ.
Sub x-over set at 60hz.

Here is the response with new sub position, no EQ. Not bad at all...


After minor tweaking on the Classe PEQ. Wasn't bad before but this is pretty damn flat!

That is quite impressive js666! Interesting you set the crossover at 60Hz...is there a reason?

[picture_shooter]

n/m

[ZIPPO]

Originally Posted by Aerodude73

lol - this makes the Third () time these were posted. One above mine, then my post for the Amazon link, now yours.

I only read the first & last post before I posted

[vsidhu]

Originally Posted by ZIPPO

I only read the first & last post before I posted

This isn't a book report for high school

[js666]

OK so the center is now on the sub. Just finished re-calibrating and watching some scenes I'm familiar with.
I can say that center on sub definitely DOES NOT affect the dialogue. Bass output is about the same as before and it doesn't seem new placement affects the bass quality in any negative way. Might even be a bit smoother... but I'm going to fine-tune it a bit more and see if I can get a substantial improvement. If anything, setup is a bit cleaner and more symmetrical.

Aesthetically, what do you guys think???

[Hammie]

Originally Posted by js666

OK so the center is now on the sub. Just finished re-calibrating and watching some scenes I'm familiar with.
I can say that center on sub definitely DOES NOT affect the dialogue. Bass output is about the same as before and it doesn't seem new placement affects the bass quality in any negative way. Might even be a bit smoother... but I'm going to fine-tune it a bit more and see if I can get a substantial improvement. If anything, setup is a bit cleaner and more symmetrical.

Aesthetically, what do you guys think???

It's what THX approves.

[js666]

Originally Posted by louhamilton

It's what THX approves.

So does Harman, I believe.