Dxd12012 & rew - AVS Forum
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Old 08-30-2014, 07:45 PM - Thread Starter
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Dxd12012 & rew

I took the plunge, and purchased an UMIK-1 which I am using with my MacBook Air. It took all day to get REW running on my MAC, and I am still not even sure Its done right. REW is confusing! xD. Anyway, I managed to take some measurements with the sub in the front left, and rear left corners of my room and here are my results below. Should I leave the sub in rear as I can't seem to get rid of the huge dip at 88Hz when the sub is placed in the front corner, and I can't get rid of the dip at 25hz when the sub is placed in the rear, but its not huge.

Front left corner



Rear left corner



Last edited by BIGBEAR2004; 08-30-2014 at 08:04 PM.
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Old 08-30-2014, 08:22 PM
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Rear left corner is easily the better place. There is more deep bass there, more upper bass, and a flatter response.
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Old 08-30-2014, 09:00 PM
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The front left corner looks better to me. If both graphs were scaled the same it would be easier to decipher.

The front left extends into the low teens, where as the rear left rolls off below 40hz.
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Old 08-30-2014, 09:23 PM
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I agree with basshead
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Old 08-30-2014, 09:33 PM
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Oops, I glossed over the scales, however I would still place it in the rear, the upper bass too much of a hit in the front. If your front speakers are capable enough, you might lower the crossover which will let you fill in the upper bass null while having the front sub placement's superior deep bass response. Or you might just use something like a mid bass module to supplement the upper bass response.
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Old 08-30-2014, 10:02 PM - Thread Starter
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Quote:
Originally Posted by shadyJ View Post
Oops, I glossed over the scales, however I would still place it in the rear, the upper bass too much of a hit in the front. If your front speakers are capable enough, you might lower the crossover which will let you fill in the upper bass null while having the front sub placement's superior deep bass response. Or you might just use something like a mid bass module to supplement the upper bass response.
It sounds a lot better in the front with a lower cross over point @ 60Hz. My fronts do extend down to 40Hz. I ordered 2 Funk 18.0C version2 subs. Hopefully all 3 will play nice together in my room.

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Old 08-31-2014, 01:46 AM
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The 18.0Cs have massive upper bass, so you are definitely set.
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Old 09-01-2014, 02:13 PM - Thread Starter
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The 18.0Cs have massive upper bass, so you are definitely set.


I will post my results when I get the other subs. This is as good as it's going to get for now.

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Old 09-01-2014, 02:30 PM
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I bought a used PC laptop for just for REW and ColorHCFR. You'd probably be better off with any version of windows on your mac and the latest REW for windows.
And, of course, Jerry's guide:
Simplified REW Setup and Use (USB Mic & HDMI Connection) Including Measurement Techniques and How To Interpret Graphs
Do you have any sort of equalization available? All you really need to do is flatten the first peak and add a house curve.
Of course, new subs are never a bad idea.
Have fun.

Downloadable FREE demo discs:
http://www.avsforum.com/t/1475769/de...ently-authored 

Did you really need to quote that entire post in your reply?
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Old 09-01-2014, 02:47 PM - Thread Starter
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Quote:
Originally Posted by LastButNotLeast View Post
I bought a used PC laptop for just for REW and ColorHCFR. You'd probably be better off with any version of windows on your mac and the latest REW for windows.
And, of course, Jerry's guide:
Simplified REW Setup and Use (USB Mic & HDMI Connection) Including Measurement Techniques and How To Interpret Graphs
Do you have any sort of equalization available? All you really need to do is flatten the first peak and add a house curve.
Of course, new subs are never a bad idea.
Have fun.

Thanks for the link. I do have an extra copy of Windows 7, and when I have time I will try to figure out how to get it on the Mac. My AVR does have a built in limited EQ, which I have been playing around with, and the best I can do with it is shown in the last pic.

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Old 09-02-2014, 10:33 AM
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Quote:
Originally Posted by BIGBEAR2004 View Post
It sounds a lot better in the front with a lower cross over point @ 60Hz. My fronts do extend down to 40Hz. I ordered 2 Funk 18.0C version2 subs. Hopefully all 3 will play nice together in my room.
I have my second 12012 on the way and will get around to measuring one then two ( mutually coupled). I'm still extremely curious on the Funks as I only have room and location for one more sub and it has to be a good single and only three come to mind with the Funk 18.0c v2 at the top followed close by a Seaton subm and PSA xs30se all none of which I've heard. This should be interesting indeed to say the least and I'm so hoping they play well together

Good luck

P.S also BigBear2004 where the side drivers facing the wall in the measurements above?

Last edited by audiofan1; 09-02-2014 at 12:49 PM.
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Old 09-02-2014, 12:47 PM
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Quote:
Originally Posted by BIGBEAR2004 View Post
I will post my results when I get the other subs. This is as good as it's going to get for now.
Whatcha complainin' about? Most folks would kill for a graph like that!

Look like your +/-3db from just under the crossover (80hz?) to around 15hz (where it gets a little weird, probably just room effects down that low).

Look like a phase issue at the crossover. Was this graph sub+mains or sub+center or sub alone?

Have you tried the sub distance tweak?

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Old 09-02-2014, 01:40 PM - Thread Starter
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Quote:
Originally Posted by audiofan1 View Post
I have my second 12012 on the way and will get around to measuring one then two ( mutually coupled). I'm still extremely curious on the Funks as I only have room and location for one more sub and it has to be a good single and only three come to mind with the Funk 18.0c v2 at the top followed close by a Seaton subm and PSA xs30se all none of which I've heard. This should be interesting indeed to say the least and I'm so hoping they play well together

Good luck

P.S also BigBear2004 where the side drivers facing the wall in the measurements above?

Nice! I am looking forward to seeing your measurements. I was going to go with another DXD12012, but the freight cost is high for me since I am in Canada, plus I was really curious about the Funk 18.0c v2. The 18.0c V2's should be here around Oct 1st. The DXD side driver was facing the wall.




Quote:
Originally Posted by Alan P View Post
Whatcha complainin' about? Most folks would kill for a graph like that!

Look like your +/-3db from just under the crossover (80hz?) to around 15hz (where it gets a little weird, probably just room effects down that low).

Look like a phase issue at the crossover. Was this graph sub+mains or sub+center or sub alone?

Have you tried the sub distance tweak?

I am happy with the results, but it could use some tweaking in the upper range .That test was with the left channel, and its similar to the center and right front. With the sub a lone it dips further. I haven't tried the sub distance tweak yet. Thanks for the link.
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Old 09-09-2014, 05:55 PM
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@ BIGBEAR2004, better hear a duo! its an entirely different animal , measurements still to come.

Candy!
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Old 09-09-2014, 07:46 PM - Thread Starter
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@ BIGBEAR2004, better hear a duo! its an entirely different animal , measurements still to come.

Candy!
Nice, you even have both subs signed by Ken himself. Lucky you! Do you still have the PSA sub too? I heard a duo, but unfortunately it was not in my room where it counts :/
Grats on the second sub.


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Old 09-09-2014, 10:07 PM
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Nice, you even have both subs signed by Ken himself. Lucky you! Do you still have the PSA sub too? I heard a duo, but unfortunately it was not in my room where it counts :/
Grats on the second sub.
I had to return the PSA for funds for the second DXD even though I found it a fantastic value and very capable sub for movies &music. I must admit at this point that I may not even need anymore subs as the bass from seat to seat is as smooth as it was when the XS15se was in the rear but with the Duo stacked and all green dots the sheer output at the MLP is a bit shocking! I understand the 6db! ( I do suspect my room has generous room gain but will hold off till I measure) increase from coupling but man its unreal and has a tightening effect on the chest. Best thing all the things you like about the single remain plus a few more things that you'd never expect.
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Old 09-09-2014, 10:58 PM - Thread Starter
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I had to return the PSA for funds for the second DXD even though I found it a fantastic value and very capable sub for movies &music. I must admit at this point that I may not even need anymore subs as the bass from seat to seat is as smooth as it was when the XS15se was in the rear but with the Duo stacked and all green dots the sheer output at the MLP is a bit shocking! I understand the 6db! ( I do suspect my room has generous room gain but will hold off till I measure) increase from coupling but man its unreal and has a tightening effect on the chest. Best thing all the things you like about the single remain plus a few more things that you'd never expect.
Judging from your space, you have room to build a quad stack, but it sounds like your bass needs are more than met for now I can't wait to see your results.

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Old 09-09-2014, 11:45 PM
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Judging from your space, you have room to build a quad stack, but it sounds like your bass needs are more than met for now I can't wait to see your results.
From measuring after adding the second I'm shy an inch and a half floor to ceiling ,That is unless I rip out the thick carpet and padding then its a true 8ft ! And I'm not sure I can trust myself with that kind of of power around as I may bring the place down..
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