My graphs - advice appreciated - Page 2 - Home Theater Forum and Systems - HomeTheaterShack.com

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post #11 of 28 Old 08-28-08, 05:45 PM
union1411
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Re: My graphs - advice appreciated

thanks for the responses. i'm gonna do some serious listening of the SVS alone compared to the combo (using blu rays that have great audio like Die Hard 4, Cloverfield, etc) and move the SVS around and see if the $500 for the MBM is worth it.

so, what about treatments or eq? so far does it look like i need them?
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post #12 of 28 Old 08-28-08, 05:46 PM
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Re: My graphs - advice appreciated


Quote:
union1411 wrote: View Post
Basically, I'm curious if I should equalize and/or get bass traps.
The answer is "yes."

It looks like you have about a 5-6 dB drop between 20-40 Hz - an equalizer could help that. An EQ could also help craft a house curve.

As you probably know, what bass traps do is truncate low frequency decay times. Yours actually look pretty good for an "untrapped" room. That 60 Hz thing is nothing to worry about, probably noise from an electric mnotor of some kind - fridge, A/C, etc.

To get the most from waterfall readings, you might want to add the mains and extend the graph's upper limit out to 300 Hz or so, since bass traps (if you get them) can improve decay up that high. It's best to keep your output levels 40-50 dB above the noise floor, and the graph's floor should be a good reflection of the room's ambient noise floor. A 45 dB lower graph limit is fine for frequency response readings, but kind of high for a waterfall, since most domestic rooms have ambient levels at least 10-15sd dB lower.

As far as subs go, you might want to add the SVS model that Sonnie had to your short list. Forget the model, but it had two 12" drivers; I'm sure he could tell you what it was.

Regards,
Wayne



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post #13 of 28 Old 08-28-08, 08:03 PM
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Re: My graphs - advice appreciated

thanks for responses again. i will fiddle with the waterfalls again with new settings.

i made more measurements tonight with SVS only (no MBM).

80db sweep; 80 xo; and this time the mic was placed much closer to where the person's head would be, using tripod. and no audyssey whatsoever (left Multi-EQ on last night by accident).

left seat and right seat. pretty amazing what this little sub can do. now i just need to sit down and A/B the combo and svs only. my impression the past using the combo with the MBM is that the midbass is more textured, so the sound quality is richer than with SVS only, of course that could be placebo.



 
post #14 of 28 Old 08-28-08, 08:19 PM
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Re: My graphs - advice appreciated

SVS-only and placed in right corner. same receiver settings as above. me likey.

post #15 of 28 Old 08-29-08, 07:18 AM
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Re: My graphs - advice appreciated

What are your plans now for the MBM?
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post #16 of 28 Old 08-29-08, 09:15 AM
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Re: My graphs - advice appreciated

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weverb wrote: View Post
What are your plans now for the MBM?
Returning it.

I did some listening of SVS alone last night on Die Hard 4 lossless (I've memorized it by now) and compared to the combo with MBM. I get the same tactile response with just the SVS and the midbass sounds pretty much identical - at one point I actually thought the SVS alone sounded better during a certain scene with gunshots, but that could be explained by the fact that it's a little harder to calibrate two subs than one. Either way, for my room, because it's so small perhaps, the MBM just doesn't offer $500 of value for me.

Now I'm looking at possibly replacing the SVS with the Epik Castle or MFW-15.

I love the sound of the Epik sub I heard before and that was just the Caliber. And Castle goes significantly lwoer than my SVS, which is nice because with my leather seats and small room I get alot of tactile response in my booty I'd be the first to buy buttkickers but I simply do not need them in my setup.

As for the MFW-15, according to craigsub on avs in that huge thread, he said he loves its midbass slam but i believe he implied that the castle is better for going lower - don't quote me on that though; i have to reread the thread.

Kinda silly that i'm considering upgrading my sub for that small of a room, but it's my mancave and i appreciate good subs when done right.
post #17 of 28 Old 08-29-08, 09:53 AM
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Re: My graphs - advice appreciated

Quote:
union1411 wrote: View Post
Kinda silly that i'm considering upgrading my sub for that small of a room, but it's my mancave and i appreciate good subs when done right.
It's never silly.
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post #18 of 28 Old 08-29-08, 11:02 AM
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Re: My graphs - advice appreciated

Perfectly understandable.

I was at a GTG and watched the shootout in Open Range on a system with a pair of MWF-15s that Mark Seaton had calibrated. The individual shots could be felt in the chest. It's the experience that made me dload REW and finally begin tweaking my SVS PB12+2 once and for all.

But I'm thinking it may be time for something newer.

Quote:
union1411 wrote: View Post
Returning it.

I did some listening of SVS alone last night on Die Hard 4 lossless (I've memorized it by now) and compared to the combo with MBM. I get the same tactile response with just the SVS and the midbass sounds pretty much identical - at one point I actually thought the SVS alone sounded better during a certain scene with gunshots, but that could be explained by the fact that it's a little harder to calibrate two subs than one. Either way, for my room, because it's so small perhaps, the MBM just doesn't offer $500 of value for me.

Now I'm looking at possibly replacing the SVS with the Epik Castle or MFW-15.

I love the sound of the Epik sub I heard before and that was just the Caliber. And Castle goes significantly lwoer than my SVS, which is nice because with my leather seats and small room I get alot of tactile response in my booty I'd be the first to buy buttkickers but I simply do not need them in my setup.

As for the MFW-15, according to craigsub on avs in that huge thread, he said he loves its midbass slam but i believe he implied that the castle is better for going lower - don't quote me on that though; i have to reread the thread.

Kinda silly that i'm considering upgrading my sub for that small of a room, but it's my mancave and i appreciate good subs when done right.
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post #19 of 28 Old 08-29-08, 08:06 PM
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Re: My graphs - advice appreciated

Ok I might have spoken too soon about the MBM. I realized I had not calibrated it correctly. So tonight I did (like this: MBM to speakers, then SVS with internal x/o to MBM, then the combo with internal xo to speakers).

Result (hearing-wise, not REW): wow. Much better than the SVS alone, especially with gunshots, etc. A lot more tactile. SVS is tactile in my room, but this is another level of tactile. Will try more movies and run REW again - bye bye weekend

Even though MBM combo now sounds a lot better, still not sure if I'm better off getting one very good sub and dismissing these two. No way to know unless I buy a new sub and compare I love being single. Or maybe this is why I'm single. hmmmmmm
post #20 of 28 Old 08-31-08, 11:00 AM
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Re: My graphs - advice appreciated

did some more measurements

as i suspected from watching movies, Dynamic Eq (not to be confused with Dynamic Volume) via Audssey is boosting the bass. and i was careful to check the SPL level when switching back forth from dynamic so the sweep would still be at 80db. left the mains on



No Dynamic Eq





With Dynamic EQ



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