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Old 01-18-2016, 07:29 AM
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Originally Posted by brian6751 View Post
you will need a powered usb cable with that distance.
thanks that's what I thought.
I ordered one for the minidsp and one for the mic.
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Old 01-18-2016, 08:15 AM
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So I think I finally got REW and was able to get a graph so I can start using my minidsp to smooth out my bass response. Looks like I do have some serious issues with peaks and nulls. When I imported REW into my 2 way advanced it didnt seem to do much at all. Do I just need to adjust it manually or should REW & the minidsp being doing most of that automatically? How do I decide my target SPL? I am a super newbie when I comes to this. Thanks for any help

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Old 01-18-2016, 08:20 AM
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Quote:
Originally Posted by neverfinished94 View Post
So I think I finally got REW and was able to get a graph so I can start using my minidsp to smooth out my bass response. Looks like I do have some serious issues with peaks and nulls. When I imported REW into my 2 way advanced it didnt seem to do much at all. Do I just need to adjust it manually or should REW & the minidsp being doing most of that automatically? How do I decide my target SPL? I am a super newbie when I comes to this. Thanks for any help

that's alot of bass :P that 200 dip is probably a reflection off the floor

Got any pictures of how you have this setup so we can guide you ?
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Old 01-18-2016, 08:42 AM
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Originally Posted by dashpuppy View Post
that's alot of bass :P that 200 dip is probably a reflection off the floor

Got any pictures of how you have this setup so we can guide you ?
pictures of my room or pictures of the 2 way advanced?
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Old 01-18-2016, 08:55 AM
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pictures of my room or pictures of the 2 way advanced?
room setup with microphone setup for measuring..
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Old 01-18-2016, 09:06 AM
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room setup with microphone setup for measuring..


2 Nearfield subs behind 2nd row of seats



I have the Umik set up on the center seat of the 2nd row at ear level.


Last edited by neverfinished94; 01-18-2016 at 05:38 PM.
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Old 01-18-2016, 10:01 AM
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Quote:
Originally Posted by neverfinished94 View Post
So I think I finally got REW and was able to get a graph so I can start using my minidsp to smooth out my bass response. Looks like I do have some serious issues with peaks and nulls. When I imported REW into my 2 way advanced it didnt seem to do much at all. Do I just need to adjust it manually or should REW & the minidsp being doing most of that automatically? How do I decide my target SPL? I am a super newbie when I comes to this. Thanks for any help

Do you have any way to EQ the response above the bass region (i.e. Audyssey)?

You should be able to bring down the peaks in the bass region pretty easily with the MiniDSP + REW EQ tool, but that huge suckout at 200hz is your mains (if this measurement is subs+mains). You will have to move them in order to improve that. I would suggest pulling them away from the front wall a foot or two and re-measure.


Quote:
I have the Umik set up on the center seat of the 2nd row at ear level.
Is that your MLP??
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Old 01-18-2016, 10:49 AM
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[QUOTE=neverfinished94;40749010]So I think I finally got REW and was able to get a graph so I can start using my minidsp to smooth out my bass response. Looks like I do have some serious issues with peaks and nulls. When I imported REW into my 2 way advanced it didnt seem to do much at all. Do I just need to adjust it manually or should REW & the minidsp being doing most of that automatically? How do I decide my target SPL? I am a super newbie when I comes to this. Thanks for any help

It is not clear from this post what you did with REW. There is a section in the 2x4 guide linked in my sig that describes how to use the REW EQ tool to create filters that can then be imported into the 2x4. If you didn't see any difference, then I am not sure you followed the procedure correctly.
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Old 01-18-2016, 06:56 PM
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Still no shipping info. Ordered the balanced 2x4 on the 12th. Give it another day then email them again.
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Old 01-18-2016, 08:08 PM
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Still no shipping info. Ordered the balanced 2x4 on the 12th. Give it another day then email them again.
I ordered mine the same time frame as you, I just received a shipping notification about 20 min ago. By tracking it should be here on Friday.
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Old 01-18-2016, 11:10 PM
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I ordered mine the same time frame as you, I just received a shipping notification about 20 min ago. By tracking it should be here on Friday.
Me too. Right after I posted in fact! Gonna be interesting to see if I can get the hang of this thing. Can't wait to see what she will do.

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Old 01-19-2016, 12:49 AM
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I just talked to Judy from Minidsp. Mine is shipping tomorrow via Speedpost/EMS instead of Fedex as I mentioned to her Fedex charges way too much in brokerage fees.
I just have to wait a little longer for it which is no big deal.
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Old 01-19-2016, 06:35 AM
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Quote:
Originally Posted by Alan P View Post
Do you have any way to EQ the response above the bass region (i.e. Audyssey)?

You should be able to bring down the peaks in the bass region pretty easily with the MiniDSP + REW EQ tool, but that huge suckout at 200hz is your mains (if this measurement is subs+mains). You will have to move them in order to improve that. I would suggest pulling them away from the front wall a foot or two and re-measure.


Is that your MLP??
That measurement was with Audyssey. I will take a measurement without Audyssey to see the difference. Yes, that is my MLP.

Quote:
Originally Posted by AustinJerry View Post

It is not clear from this post what you did with REW. There is a section in the 2x4 guide linked in my sig that describes how to use the REW EQ tool to create filters that can then be imported into the 2x4. If you didn't see any difference, then I am not sure you followed the procedure correctly.
The graph is without the change made by the minidsp. I will post the comparison graph pre & post minidsp hopefully tonight.
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Old 01-19-2016, 07:22 AM
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That measurement was with Audyssey.
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Old 01-19-2016, 05:35 PM
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Here is the graph. Green is with the minidsp & red is without. I didnt know what to set my target spl at so I set it at 102 db. Dont ask why

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Old 01-19-2016, 05:48 PM
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Here is the graph. Green is with the minidsp & red is without. I didnt know what to set my target spl at so I set it at 102 db. Dont ask why

Wow, a 30dB difference between the level at 30Hz vs. the level at 200Hz? Not good. That must sound pretty bass-heavy. The difference between the two curves is insignificant. Are you sure you are running the REW EQ tool properly? Perhaps you could share some screenshots of REW with the settings you are using.
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Old 01-19-2016, 05:57 PM
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Can someone tell me what plugin I need to purchase to run 4 subs with the balanced 2x4?

60" Panasonic Plasma ~ BenQ HT1075 / 92" Screen~Onkyo TX-NR3008(Pre/Pro)
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Old 01-19-2016, 06:04 PM
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Can someone tell me what plugin I need to purchase to run 4 subs with the balanced 2x4?
I recommend the 4-Way Advanced, Read the guide linked in my sig.
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Old 01-19-2016, 07:59 PM
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So I moved my mains about 10-12" forward and it helped the issue around 200hz. Green is before and black is after.



So I wanted to see what Audyssey was doing so I turned it off. Black is with Audyssey and purple is without Audyssey
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Old 01-20-2016, 07:50 AM
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Originally Posted by neverfinished94 View Post
Here is the graph. Green is with the minidsp & red is without. I didnt know what to set my target spl at so I set it at 102 db. Dont ask why

Quote:
Originally Posted by AustinJerry View Post
Wow, a 30dB difference between the level at 30Hz vs. the level at 200Hz? Not good. That must sound pretty bass-heavy. The difference between the two curves is insignificant. Are you sure you are running the REW EQ tool properly? Perhaps you could share some screenshots of REW with the settings you are using.
I agree with Jerry...it looks like the EQ in the MiniDSP is basically doing nothing. Those three giant peaks in your bass response should have been pretty easy to flatten out. Show us a screenshot of the EQ window and filters you are using.

I also agree with Jerry that a 20dB boost for the subs is insane (and I really like bass)...where did Audyssey set your sub trim and where do you have it set now?? EDIT: Your subs are probably only running 10-12dB hot, but that huge spike at ~30hz makes it look like (and I'm sure sound like) more.

For the Target Level, you should just hit the Set Target Level button.

Last edited by Alan P; 01-20-2016 at 07:55 AM.
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Old 01-20-2016, 07:56 AM
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So I moved my mains about 10-12" forward and it helped the issue around 200hz. Green is before and black is after.
You're welcome.

I would try pulling them out even further to see if the response improves even more.
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Old 01-20-2016, 07:58 AM
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So I wanted to see what Audyssey was doing so I turned it off. Black is with Audyssey and purple is without Audyssey
Are you certain this is Audyssey ON/OFF and not Audyssey REFERENCE/FLAT? That's what it looks like to me.

If it is indeed Audyssey ON/OFF, it seems that Audyssey isn't helping you much (or at all). What version of Audyssey are you using? Do you have any pics of your room (sorry if you've already posted pics, and if you did, point me to them)?
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Old 01-20-2016, 09:40 AM
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I would suggest pulling them away from the front wall a foot or two and re-measure.
Can't the same be done by moving close to the wall and/or padding behind the speaker?
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Old 01-20-2016, 09:53 AM
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Can't the same be done by moving close to the wall and/or padding behind the speaker?
In this case, the OP's speakers were pretty much already up against the wall and this is why I suggested moving them out.

Yes, room treatments could accomplish the same thing, but moving the speakers is free.
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Old 01-20-2016, 11:26 AM
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In this case, the OP's speakers were pretty much already up against the wall and this is why I suggested moving them out.

Yes, room treatments could accomplish the same thing, but moving the speakers is free.
Ok, thanks. Just making sure I didn't miss something. I'm setting up my speakers soon so wanted to double confirm.
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Old 01-20-2016, 12:36 PM
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Can't the same be done by moving close to the wall and/or padding behind the speaker?
As a general rule, placing the sub close to the wall excites the mode associated with the wall and produces less flat bass response. So, moving the sub further away from the wall is usually a much better placement. "Padding behind the speaker" is not correct. Bass response is improved by adding bass traps, and the most effective placement of bass traps is in the corner, i.e. at the intersection of two or more walls. Behind the speaker is not the optimal placement.
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Old 01-20-2016, 01:32 PM
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Can't the same be done by moving close to the wall and/or padding behind the speaker?
We think a lot a like! I would cover the entire front wall in 1"- 703 and then use chunk corner traps.
When I added the corner traps it made a huge difference.
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Old 01-20-2016, 02:25 PM
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We think a lot a like! I would cover the entire front wall in 1"- 703 and then use chunk corner traps.
When I added the corner traps it made a huge difference.
1" 703 is not reducing bass resonance. It may be absorbing specular reflections, but nothing in the modal region.
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Old 01-20-2016, 03:01 PM
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1" 703 is not reducing bass resonance. It may be absorbing specular reflections, but nothing in the modal region.
Even if its ALL around??

I can put 4" behind and 16" all around the speaker... Should stop some bass
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Old 01-20-2016, 04:14 PM
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Even if its ALL around??

I can put 4" behind and 16" all around the speaker... Should stop some bass
You can try. Measure before and after to determine effectiveness and you will have your answer.
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