Newb DIY guy, dual UXL-18 GET-R-DONE - Page 5 - AVS Forum
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post #121 of 136 Old 08-15-2014, 11:01 AM - Thread Starter
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Sub build http://www.avsforum.com/forum/155-di...et-r-done.html
Center - JBL LC2
Mains - JBL L820
Surrounds - JBL L820
Sub - Dual UXL'18 enclosures,iNuke6000dsp
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post #122 of 136 Old 08-15-2014, 11:13 AM
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it's your mic clipping, not your sub. Is your mic volume at 100%? Make sure to follow a good REW guide for set-up.
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post #123 of 136 Old 08-15-2014, 11:15 AM
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I can't tell if that graph look good or not...your vertical scale is set to 20db increments when it should be 5db.

Please follow the guidelines I posted above and re-post the graph.

That being said, it looks like you've got a pretty good dip between 40-55hz. Looks to be around 10db or more....that's not good as that is right where the "meat" of the mid-bass lies.

RE: clipping - are you running REW with HDMI or with the legacy analog connections? If legacy, how exactly do you have your PC connected to your AVR? Did you calibrate the SPL before your REW session? You have an SPL meter, right?

Are these with Audyssey? Do you have Audyssey?? If so, is this with Dyn EQ on or off?
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post #124 of 136 Old 08-15-2014, 11:15 AM
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If you can move subs that is the best way to remove nulls. If you can't do that then put a neg peq of 8 at 39hz with q of 2 and -5 at 53hz q if 2.
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post #125 of 136 Old 08-15-2014, 11:16 AM
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Ooops, you beat me to it with the 5db steps.

Yup, horrible dip there....around 12-13db looks like.
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post #126 of 136 Old 08-15-2014, 12:26 PM - Thread Starter
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I tried moving the subs and it did not help much, if any. I confirmed a 14db loss from 39hz to 44hz with the spl meter..kinda bummed out. It still sounds great, but now i know it could be better. Nothing i can really do about that.

I put in Donny's suggestion with settings and it did not really improve much, or get worse.

Sub build http://www.avsforum.com/forum/155-di...et-r-done.html
Center - JBL LC2
Mains - JBL L820
Surrounds - JBL L820
Sub - Dual UXL'18 enclosures,iNuke6000dsp
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post #127 of 136 Old 08-15-2014, 01:24 PM
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Quote:
Originally Posted by wyattroa View Post
I tried moving the subs and it did not help much, if any. I confirmed a 14db loss from 39hz to 44hz with the spl meter..kinda bummed out. It still sounds great, but now i know it could be better. Nothing i can really do about that.

I put in Donny's suggestion with settings and it did not really improve much, or get worse.
Yup, that's a null. Have you tried measuring a foot or so in front or behind the MLP? I bet you'll get drastically different readings.

Do you have a pic or diagram of your room you could share?
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post #128 of 136 Old 08-15-2014, 01:28 PM
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I had a 10db null at 80hz with two subs up front. I like my subs xo at 110hz so it sucked. When I added my third sub nearfield it got rid of null completely. Now I can feel the midbass better.

Nearfield can be a micro-cube which can double as an end table.
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post #129 of 136 Old 09-20-2014, 02:56 PM - Thread Starter
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Update, still loving this system...its like a whole new world out there when listening to the same movie compared to the old system.

My wife is out of town and the kids are at grandmas. Before she left she asked that when she comes home that all windows are intact and that our foundation has not crumbled..lol..movie suggestions?

Sub build http://www.avsforum.com/forum/155-di...et-r-done.html
Center - JBL LC2
Mains - JBL L820
Surrounds - JBL L820
Sub - Dual UXL'18 enclosures,iNuke6000dsp
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post #130 of 136 Old 09-20-2014, 03:49 PM
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Quote:
Originally Posted by wyattroa View Post
Update, still loving this system...its like a whole new world out there when listening to the same movie compared to the old system.

My wife is out of town and the kids are at grandmas. Before she left she asked that when she comes home that all windows are intact and that our foundation has not crumbled..lol..movie suggestions?
Godzilla , edge of tomorrow , freebirds.
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post #131 of 136 Old 09-20-2014, 04:02 PM
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Incredibles, terminator salvation, Elysium and battle Los Angeles
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post #132 of 136 Old 09-20-2014, 04:03 PM - Thread Starter
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I would love to watch edge of tomorrow but i dont have it..Godzilla it is.. I just listen to bass i love you at -14db..was lighting up 2 light on the amp. On the hard hitting spots i stood in my kitchen and the plastic bag was fluttering with it, not shaking, fluttering!

Sub build http://www.avsforum.com/forum/155-di...et-r-done.html
Center - JBL LC2
Mains - JBL L820
Surrounds - JBL L820
Sub - Dual UXL'18 enclosures,iNuke6000dsp
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post #133 of 136 Old 09-20-2014, 07:16 PM
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Quote:
Originally Posted by wyattroa View Post
I would love to watch edge of tomorrow but i dont have it..Godzilla it is.. I just listen to bass i love you at -14db..was lighting up 2 light on the amp. On the hard hitting spots i stood in my kitchen and the plastic bag was fluttering with it, not shaking, fluttering!
Pm me , ill hook you up.
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post #134 of 136 Old 09-20-2014, 09:11 PM
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Nice build good Sir. Built my first sub not long ago too. Read through your whole thread and I love reading first impressions of first time DIY'ers.Very happy to hear you were successful and they look good too

Quote:
Originally Posted by chalugadp View Post
I had a 10db null at 80hz with two subs up front. I like my subs xo at 110hz so it sucked. When I added my third sub nearfield it got rid of null completely. Now I can feel the midbass better.

Nearfield can be a micro-cube which can double as an end table.
GOT DAMN YOU! Have been planning building a table to double as bass absorber, but now I'm thinking table with two 18" woofers along each side and the middle as bass absorber!!! Time for research & Sketchup!

DAC/Preamp: miniDSP 4x10 HD and Mytek 192 Stereo DSD DAC
Speakers: JBL 4343B, JBL 4430 and JBL 120Ti
Amplifiers: Emotiva XPR-1, Denon POA 1500, QSC GX5 and Sanway's LabGruppen FP14000 clone
Sub: DIY LMS Ultra 5400
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post #135 of 136 Old 09-21-2014, 09:46 AM - Thread Starter
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Quote:
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Nice build good Sir. Built my first sub not long ago too. Read through your whole thread and I love reading first impressions of first time DIY'ers.Very happy to hear you were successful and they look good too
Yeah I am loving it. I watched Godzilla last night and there was plenty of rumble in that movie. I know the movie is getting some crap over on the master bass list, but my couch was vibrating through a good portion of that movie. I started the movie at -10db and ended up finishing it at -17db...love my system. Now I just have to save up for a projector and screen.

Sub build http://www.avsforum.com/forum/155-di...et-r-done.html
Center - JBL LC2
Mains - JBL L820
Surrounds - JBL L820
Sub - Dual UXL'18 enclosures,iNuke6000dsp
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post #136 of 136 Old 09-21-2014, 10:00 AM
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Quote:
Originally Posted by wyattroa View Post
Yeah I am loving it. I watched Godzilla last night and there was plenty of rumble in that movie. I know the movie is getting some crap over on the master bass list, but my couch was vibrating through a good portion of that movie. I started the movie at -10db and ended up finishing it at -17db...love my system. Now I just have to save up for a projector and screen.
If its getting crap they have crappy systems . That movie is nonstop bass.
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