My Monolith REW graph

andicapped · 09-07-2009, 5:00 PM

hi folks,

right i've been playing around with REW in an attempt to see what my sub is doing. with help from Moonfly i created this

i'm not quite sure if this is good bad or ugly

i guess what i'm saying is HEEEEEEEEEEEEELP

Badger0-0 · 09-07-2009, 5:20 PM

Help with what?

Doesn't look bad at the bottom, but it drops off some above 40 doesn't it?
I'm not saying that's bad though. I'd expect it's better for action movies than general telly.

Depends how your speakers interact, but if you're running an 80hz crossover, you might want to try lowering it.

andicapped · 09-07-2009, 5:32 PM

help with what? good question. i have no idea

the graph i posted is the sub on it's own, i disconnected the main speakers. i have my crossovers set to 80 on the onk 875

i guess i really wanted to know if that was an acceptable response from my monolith

Nimby · 09-07-2009, 5:51 PM

Quote:

Originally Posted by andicapped

help with what? good question. i have no idea

the graph i posted is the sub on it's own, i disconnected the main speakers. i have my crossovers set to 80 on the onk 875

i guess i really wanted to know if that was an acceptable response from my monolith

Bung a BFD into the mix with quite a broad cut at 35hz and Bob's yer uncle.

If not, it would probably be great for films, as it is, with plenty of bottom end welly.

Might be a bit heavy for music.

Badger0-0 · 09-07-2009, 5:59 PM

Quote:

Originally Posted by andicapped

help with what? good question. i have no idea

the graph i posted is the sub on it's own, i disconnected the main speakers. i have my crossovers set to 80 on the onk 875

i guess i really wanted to know if that was an acceptable response from my monolith

Yes, it looks fine at the bottom end

I realise that's sub only, which is why I mentioned speaker integration.

I'd run another sweep now with the speakers, to see what you get.
I'm guessing you'll see a fair dip in the 40-70 area. There's a lot of info to be had there, which is why I think letting your speakers do a bit more might be of benefit.

But as Nimby suggests, you have a good case for using a BFD, as you could cut the bottom to suit

The main point is you've got decent bottom end, so you've got options

andicapped · 09-07-2009, 6:03 PM

good good, i have a dedicated room thats just for films and PS3 gaming duties, so no music.

i'll have a think about a BFD, any other suggestions or should i leave it as it is.

i'd quite like to know what i'm looking at, to be honest it makes no sense to me, if someone would be good enough to break it down for me so i understand it a little it'd be much appreciated

Badger0-0 · 09-07-2009, 6:23 PM

Quote:

good good, i have a dedicated room thats just for films and PS3 gaming duties, so no music.

Blimey, there's every chance you don't have to do anything then

How to explain it?

Hmm, well basically the blue line is the one you're aiming for, for a flat response that is.
Your response, the green line, does track it pretty well, but as you can see it rises fairly rapidly below 40hz. Whilst it's not ideal for music (because it'll sound one-noted and too deep) it's ideal for anything with a boom crash bang type soundtrack, because all the noisy effects will be enhanced

Not necessarily 100% accurate, but bloody good fun

So in your case, I don't think I'd do anything at all, which is a bonus.

I'd still like to see a curve of everything running though, just out of interest.

The point I suppose is, if you're happy with how it sounds, leave well alone

andicapped · 09-07-2009, 6:34 PM

i've just reconnected my front speakers and done another graph, i have NOT altered anything and here it is

albriscoe · 09-07-2009, 6:49 PM

What did I tell you Andy

hook line and sinker

-Ad- · 09-07-2009, 6:51 PM

Mine also had a massive dip after I ran mains + sub together.

I levelled it out by removing the cut filters I had on the BFD at that frequency, so they both levelled out nicely. honestly don't know if that's correct or why (constructive interference

) but the graph looked nice.

Have a read up on the american forum where there are in depth guides to house curves. I still haven't got it all or sure if I have even done it correctly, but when I posted over there the guys said an awful lot I followed from their guides was a little old and the wrong way of doing it.

Just been enjoying films since rather than tweaking

andicapped · 09-07-2009, 6:57 PM

you were right Al

What have i done ...................................

**IronGiant** · 09-07-2009, 6:59 PM

Flip the phase switch on the sub and run it again

andicapped · 09-07-2009, 7:00 PM

the above graph with the front speakers connected is without smoothing if that makes any difference.

Ad- i had a little read on the american site and to be quiet honest i got completely lost. think i've had too many beers to be messing around with this.
i'll have another look and see what i can come up with

**IronGiant** · 09-07-2009, 7:01 PM

Quote:

Originally Posted by IronGiant

Flip the phase switch on the sub and run it again

Try it

andicapped · 09-07-2009, 7:02 PM

irongiant--- i have a phase knob not a switch. it's currently at 0 do you mean turn it all the way round? or just to the 1st mark, sub instructions say the turn to 1st mark

Badger0-0 · 09-07-2009, 7:03 PM

As said, run it with the phase switched and the same limits (15-200).
And smoothed.

andicapped · 09-07-2009, 7:07 PM

ok phase knob turned all the way

Badger0-0 · 09-07-2009, 7:09 PM

That looks better, but run it with all speakers 15-200.

andicapped · 09-07-2009, 7:11 PM

? what ya mean?

Badger0-0 · 09-07-2009, 7:15 PM

Run the speakers and sub with the freq limits set 15 to 200, so it looks similar to your first graph.

**IronGiant** · 09-07-2009, 7:21 PM

He did didn't he?

andicapped · 09-07-2009, 7:21 PM

thats what that graph is, i think.

all speakers connected, sub connected. do i need to hange a setting on my amp? sorry if i'm being a bit thick here. amp is currently set to stereo

Badger0-0 · 09-07-2009, 7:29 PM

Oh sorry, I thought that was sub only.

The previous one showed a massive dip at 70, but you've sorted it with phase.

I wouldn't be too unhappy with that.

How's it sound in comparison with just that phase adjustment?

andicapped · 09-07-2009, 7:32 PM

Quote:

Originally Posted by Badger0-0

How's it sound in comparison with just that phase adjustment?

dunno

too much tweaking not enough film watchin

would a BFD help me flatten this out a bit or would it not be worth it?

Badger0-0 · 09-07-2009, 7:35 PM

I'd be happy with that.

It's pretty flat from 40hz up which is where most stuff is, with a nice rise in the bottom end, for effects.

I'd say job done myself.

Of course the proof is in the pudding

andicapped · 09-07-2009, 7:54 PM

just played the 1st 10mins of Bond Q of S and it sounds superb, maybe it's wishful thinking by my ears or it actually does sound better

thanks for the help guys, i'm sure i'll be back for some more

watermanpc · 09-07-2009, 7:57 PM

hope you enjoy it, it looks great!!! at least more than Im ejoying mine

...http://www.avforums.com/forums/subwo...nolith-me.html...do you have any equalizer??

Badger0-0 · 09-07-2009, 8:04 PM

Quote:

Originally Posted by andicapped

just played the 1st 10mins of Bond Q of S and it sounds superb, maybe it's wishful thinking by my ears or it actually does sound better

thanks for the help guys, i'm sure i'll be back for some more

If you were running it as in post #8 before, I'll bet it sounds decidedly better and it wont be imagined. You've raised the bass significantly in the area that is most important generally