MartySub FAQ - Page 80 - AVS Forum | Home Theater Discussions And Reviews
Forum Jump: 
 1651Likes
Reply
 
Thread Tools
post #2371 of 5032 Old 10-16-2015, 04:15 PM
AVS Forum Special Member
 
Shadowed's Avatar
 
Join Date: Mar 2014
Posts: 2,243
Mentioned: 6 Post(s)
Tagged: 0 Thread(s)
Quoted: 939 Post(s)
Liked: 909
Quote:
Originally Posted by mal01 View Post
I am putting together a full Marty and have a question about bracing, does it matter how close a brace is to the back of the woofer, is there a minimum distance that a brace should be from the back, below or above the woofer? Thanks!
No, as long as it doesnt interfere with the cone movement or block air vent on back of motor if it has one.
Shadowed is offline  
Sponsored Links
Advertisement
 
post #2372 of 5032 Old 10-16-2015, 04:52 PM
Advanced Member
 
mal01's Avatar
 
Join Date: Mar 2009
Location: Bardstown, KY
Posts: 668
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 112 Post(s)
Liked: 29
Quote:
Originally Posted by Shadowed View Post
No, as long as it doesnt interfere with the cone movement or block air vent on back of motor if it has one.
Great, thanks!
mal01 is offline  
post #2373 of 5032 Old 10-20-2015, 05:25 AM
Member
 
Join Date: Nov 2014
Location: Upstate NY
Posts: 128
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 58 Post(s)
Liked: 12
I got one of my Marty Cube HT18s done a couple weeks ago and received my UMIK last night, so of course I had to take some measurements. I was quite impressed with how easy all the software was to use. The only thing I can't figure out with REW is how to make adjustments to the correction target to bring up the low end, everything is easy.

Here's a graph of the baseline measurement (I can't figure out how to show it larger).




I'm using the DSP in my iNUKE for equalization. Sadly, I forgot to save the final measurement file, but I wasn't too happy with the outcome, especially below 23Hz. I've got the signal flat to +/-2db between 23Hz and 75Hz, but there's a pretty steep dropoff at both ends. I was able to pull up the 70-85Hz a bit, but it was still a pretty steep dive. There were 3 EQ settings that it had me add between 30 and 48Hz, nothing lower or higher.


Is there anything that can be done below 23Hz? I turned off the 20Hz filter for a couple tests and it didn't change much.


I'll grab a final graph tonight and post it up. Any suggestions in the meantime?
Attached Thumbnails
Click image for larger version

Name:	Baseline REW - 1x MiniMarty HT18.jpg
Views:	117
Size:	48.2 KB
ID:	1006209  

3D Blurays, Blurays and DVDs for Sale
Digital Movie Codes For Sale
Sony VPL- HW40ES / Sony STR-DN850 / OPPO BDP-103D / 3x DIY Soundgroup 893 / 2x SI HT18 MartyCubes / Behinger iNuke 6000DSP
SageFly is offline  
Sponsored Links
Advertisement
 
post #2374 of 5032 Old 10-20-2015, 06:18 AM
AVS Forum Special Member
 
squiers007's Avatar
 
Join Date: May 2014
Location: Newport, OR
Posts: 1,697
Mentioned: 68 Post(s)
Tagged: 0 Thread(s)
Quoted: 789 Post(s)
Liked: 417
Quote:
Originally Posted by SageFly View Post
I got one of my Marty Cube HT18s done a couple weeks ago and received my UMIK last night, so of course I had to take some measurements. I was quite impressed with how easy all the software was to use. The only thing I can't figure out with REW is how to make adjustments to the correction target to bring up the low end, everything is easy.

Here's a graph of the baseline measurement (I can't figure out how to show it larger).




I'm using the DSP in my iNUKE for equalization. Sadly, I forgot to save the final measurement file, but I wasn't too happy with the outcome, especially below 23Hz. I've got the signal flat to +/-2db between 23Hz and 75Hz, but there's a pretty steep dropoff at both ends. I was able to pull up the 70-85Hz a bit, but it was still a pretty steep dive. There were 3 EQ settings that it had me add between 30 and 48Hz, nothing lower or higher.


Is there anything that can be done below 23Hz? I turned off the 20Hz filter for a couple tests and it didn't change much.


I'll grab a final graph tonight and post it up. Any suggestions in the meantime?
How large is your room? Also, be sure and keep the HPF active especially if you are going to be playing any movie content. The excursion of the sub shoots up like a rocket below tuning so you want to be careful.

One thing you can try, especially if you don't listen at or near reference is add a +3db boost at 20hz. Myself and Chalugadp do this and it helps bring up the sub 23hz area like you were asking about. I wouldn't go much more than 3db's because the excursion and power needed for much more than that rises quickly.

Check out my End-Table Marty Build
squiers007 is offline  
post #2375 of 5032 Old 10-20-2015, 09:14 AM
Member
 
Join Date: Nov 2014
Location: Upstate NY
Posts: 128
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 58 Post(s)
Liked: 12
Quote:
Originally Posted by squiers007 View Post
How large is your room? Also, be sure and keep the HPF active especially if you are going to be playing any movie content. The excursion of the sub shoots up like a rocket below tuning so you want to be careful.

One thing you can try, especially if you don't listen at or near reference is add a +3db boost at 20hz. Myself and Chalugadp do this and it helps bring up the sub 23hz area like you were asking about. I wouldn't go much more than 3db's because the excursion and power needed for much more than that rises quickly.

The room is L shaped and open to the rest of the house (the leg of the L with the subs against the wall is 11' wide and seating is about 13' away).


The HPF was only off for 2 pink noise sweeps from 10-100Hz at ≈80db. It'll definitely stay on otherwise. The Martycubes that I built are still tuned at 20Hz.


I tried adding a boost at 20Hz, but still no improvement. For the pink noise sweep I went as high as +5db, but still didn't see much change.


I'll definitely compare the two subs once the second is done to make sure I didn't mess something up with the assembly.

3D Blurays, Blurays and DVDs for Sale
Digital Movie Codes For Sale
Sony VPL- HW40ES / Sony STR-DN850 / OPPO BDP-103D / 3x DIY Soundgroup 893 / 2x SI HT18 MartyCubes / Behinger iNuke 6000DSP
SageFly is offline  
post #2376 of 5032 Old 10-20-2015, 09:22 AM
AVS Forum Special Member
 
squiers007's Avatar
 
Join Date: May 2014
Location: Newport, OR
Posts: 1,697
Mentioned: 68 Post(s)
Tagged: 0 Thread(s)
Quoted: 789 Post(s)
Liked: 417
Quote:
Originally Posted by SageFly View Post
The room is L shaped and open to the rest of the house (the leg of the L with the subs against the wall is 11' wide and seating is about 13' away).


The HPF was only off for 2 pink noise sweeps from 10-100Hz at ≈80db. It'll definitely stay on otherwise. The Martycubes that I built are still tuned at 20Hz.


I tried adding a boost at 20Hz, but still no improvement. For the pink noise sweep I went as high as +5db, but still didn't see much change.


I'll definitely compare the two subs once the second is done to make sure I didn't mess something up with the assembly.
My guess is it's simply the room. With a large volume to fill you get hardly any room gain. This is the problem I have also, The only solution is to add more subs with lower tuning to get additional output down below 23hz.

If you haven't already you might try messing around with placement to see if that helps at all.

Check out my End-Table Marty Build
squiers007 is offline  
post #2377 of 5032 Old 10-20-2015, 09:56 AM
Advanced Member
 
splotten's Avatar
 
Join Date: May 2009
Posts: 835
Mentioned: 8 Post(s)
Tagged: 0 Thread(s)
Quoted: 292 Post(s)
Liked: 140
Try and take a closeup measurement 1" from the cone to see where the tuning frequency ended up. The tuning frequency is where the cone has minimum excursion and it will look like a steep dip in the sweep.

Last edited by splotten; 10-20-2015 at 10:01 AM.
splotten is offline  
post #2378 of 5032 Old 10-20-2015, 01:16 PM
Advanced Member
 
mal01's Avatar
 
Join Date: Mar 2009
Location: Bardstown, KY
Posts: 668
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 112 Post(s)
Liked: 29
Ok, I have got my marty up and running in my theater but I have just simply plugged it in to where the sealed sub that it replaced was at, I guess in order to know if I want to do more of these I need to unhook the other subs and run a calibration on the Marty only?
mal01 is offline  
post #2379 of 5032 Old 10-22-2015, 08:51 PM
Senior Member
 
Join Date: Oct 2014
Location: Brentwood, TN
Posts: 238
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 130 Post(s)
Liked: 9
Need some help, setup: inuke 3000DSP and a pair of SI HT18-D4.
Problem: I followed the instructions on the first page and went into the DSP setting to do initial setup, for some reason on the "Filter" tab whenever I set the "High Pass 1" to 20hz it automatically goes up to 30hz.

Can any one assist ?
triplejs15 is offline  
post #2380 of 5032 Old 10-22-2015, 09:16 PM
AVS Forum Special Member
 
NODES's Avatar
 
Join Date: Sep 2007
Posts: 1,904
Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
Quoted: 653 Post(s)
Liked: 276
Quote:
Originally Posted by mal01 View Post
Ok, I have got my marty up and running in my theater but I have just simply plugged it in to where the sealed sub that it replaced was at, I guess in order to know if I want to do more of these I need to unhook the other subs and run a calibration on the Marty only?

I would redo the calibration using your AVR.

Who needs 4K?... just go see your optometrist.
NODES is offline  
post #2381 of 5032 Old 10-22-2015, 10:02 PM
AVS Forum Special Member
 
Augerhandle's Avatar
 
Join Date: Jan 2009
Location: About 25" away from my computer screen
Posts: 5,149
Mentioned: 27 Post(s)
Tagged: 0 Thread(s)
Quoted: 1158 Post(s)
Liked: 1143
Quote:
Originally Posted by triplejs15 View Post
Need some help, setup: inuke 3000DSP and a pair of SI HT18-D4.
Problem: I followed the instructions on the first page and went into the DSP setting to do initial setup, for some reason on the "Filter" tab whenever I set the "High Pass 1" to 20hz it automatically goes up to 30hz.

Can any one assist ?

You can click and drag on the virtual dial, or just enter 20 in the text box and hit enter.

"The wise understand by themselves; fools follow the reports of others"-Tibetan Proverb
_____________________ http://www.scientificamerican.com/article/auger-handle/ ________________________
Augerhandle is offline  
post #2382 of 5032 Old 10-23-2015, 09:18 PM
AVS Forum Special Member
 
derrickdj1's Avatar
 
Join Date: Sep 2011
Posts: 3,767
Mentioned: 102 Post(s)
Tagged: 0 Thread(s)
Quoted: 1005 Post(s)
Liked: 767
Punch 20 in the box and hit enter. Are you using stereo or, the dual mono setting ? Is the amp in bridge mode?
derrickdj1 is offline  
post #2383 of 5032 Old 10-24-2015, 01:42 PM
Member
 
jjgear's Avatar
 
Join Date: Jun 2005
Posts: 174
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 16 Post(s)
Liked: 15
So i have 2 johnny subs running off a dsp1000 and am not getting sound from 1 sub. Both drivers are d4. Which way should the wire be hooked up 1+ and 1- of 1+ and 2+
jjgear is offline  
post #2384 of 5032 Old 10-24-2015, 07:24 PM
AVS Forum Special Member
 
rhodesj's Avatar
 
Join Date: Apr 2005
Posts: 2,158
Mentioned: 39 Post(s)
Tagged: 0 Thread(s)
Quoted: 1009 Post(s)
Liked: 600
If using both the A and B jacks, both use +-1.
rhodesj is offline  
post #2385 of 5032 Old 11-03-2015, 07:54 AM
Member
 
bigkev4123's Avatar
 
Join Date: May 2004
Posts: 165
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 18 Post(s)
Liked: 24
I planned on buying the Stonehenge subwoofer boxes from DIYSG, but it looks like it might be a while before they are back in stock. As a result, I am looking at just building the cabinets myself. I am particularly interested in the Minimarty style but wondering if it would be possible to modify the design to make it thinner. I am using an acoustic screen and the subwoofers will be behind the screen, so I am depth limited to about 18" - 20". Would it be detrimental to the minimarty design if I simply modify the depth measurements to get it to around 18" deep? I would keep the other dimensions the same (height and width).

I will be using 2 of SI HT 18 D4 hooked up to a INUKE 3000dsp. Plan on running the subs at 2 ohms. Please let me know what you think, just looking for solid output around 18 - 20hz, thanks.
bigkev4123 is offline  
post #2386 of 5032 Old 11-03-2015, 08:20 AM
AVS Forum Special Member
 
brian6751's Avatar
 
Join Date: Mar 2006
Location: Canton, MI
Posts: 6,978
Mentioned: 64 Post(s)
Tagged: 0 Thread(s)
Quoted: 1686 Post(s)
Liked: 1676
Quote:
Originally Posted by bigkev4123 View Post
I planned on buying the Stonehenge subwoofer boxes from DIYSG, but it looks like it might be a while before they are back in stock. As a result, I am looking at just building the cabinets myself. I am particularly interested in the Minimarty style but wondering if it would be possible to modify the design to make it thinner. I am using an acoustic screen and the subwoofers will be behind the screen, so I am depth limited to about 18" - 20". Would it be detrimental to the minimarty design if I simply modify the depth measurements to get it to around 18" deep? I would keep the other dimensions the same (height and width).

I will be using 2 of SI HT 18 D4 hooked up to a INUKE 3000dsp. Plan on running the subs at 2 ohms. Please let me know what you think, just looking for solid output around 18 - 20hz, thanks.
this might be what your looking for.

https://www.avsforum.com/forum/155-di...e-ps-18-a.html



.

--------------------------------------------------
FOR SALE:
Lots of stuff. Check the Audio Gear Classifieds
brian6751 is online now  
post #2387 of 5032 Old 11-03-2015, 09:41 AM
Member
 
fajita123's Avatar
 
Join Date: Apr 2010
Location: SK
Posts: 33
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 5 Post(s)
Liked: 11
Alright, currently building two marty cubes and have ordered two SI-18-HT D2's as the D4's are out of stock. Also ordered an inuke 6000 DSP off of ebay as I read it's the best option for getting the max out of D2's. The question I have is on wiring - from what I gather each sub will be wired to its own channel of the 6000DSP. Does this look right?

Click image for larger version

Name:	1_2ohm_dvc_4ohm.gif
Views:	104
Size:	7.0 KB
ID:	1036321

If this is the case, I need two speakon terminals per box and two runs back to the amp for each sub?

Thanks!
derrickdj1 likes this.
fajita123 is offline  
post #2388 of 5032 Old 11-04-2015, 12:04 AM
 
More is Better's Avatar
 
Join Date: May 2013
Location: USA
Posts: 1,371
Mentioned: 15 Post(s)
Tagged: 0 Thread(s)
Quoted: 620 Post(s)
Liked: 354
Quote:
Originally Posted by fajita123 View Post
Alright, currently building two marty cubes and have ordered two SI-18-HT D2's as the D4's are out of stock. Also ordered an inuke 6000 DSP off of ebay as I read it's the best option for getting the max out of D2's. The question I have is on wiring - from what I gather each sub will be wired to its own channel of the 6000DSP. Does this look right?

Attachment 1036321

If this is the case, I need two speakon terminals per box and two runs back to the amp for each sub?

Thanks!


That picture is right.


The wire on the right is just a foot long piece of wire to connect the + and - terminals.


The 2 unconnected wires on the left of the pic are a single pair from the amp.


1 speakon per sub box.
fajita123 likes this.
More is Better is offline  
post #2389 of 5032 Old 11-04-2015, 06:48 AM
Member
 
fajita123's Avatar
 
Join Date: Apr 2010
Location: SK
Posts: 33
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 5 Post(s)
Liked: 11
Quote:
Originally Posted by More is Better View Post
That picture is right.


The wire on the right is just a foot long piece of wire to connect the + and - terminals.


The 2 unconnected wires on the left of the pic are a single pair from the amp.


1 speakon per sub box.
Ok, thanks! Speakon is new to me so wasn't sure.
fajita123 is offline  
post #2390 of 5032 Old 11-07-2015, 03:34 PM
Senior Member
 
artyusmce's Avatar
 
Join Date: Apr 2006
Location: Tehachapi, Ca.
Posts: 257
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 29 Post(s)
Liked: 19
Quote:
Originally Posted by lemonslush View Post
Has any one added a dual post to there subs with DVC? I was debating on hooking each voice coil up to its own terminal on the back so If I wanted to swap it from 2-8 ohms I could do it quickly without removing the sub from its box?
http://www.amazon.com/Bi-Amp-Speaker...r+terminal+cup



did you do this and has it worked as expected
artyusmce is offline  
post #2391 of 5032 Old 11-07-2015, 04:54 PM
AVS Forum Special Member
 
lemonslush's Avatar
 
Join Date: Feb 2013
Location: MA
Posts: 1,649
Mentioned: 80 Post(s)
Tagged: 0 Thread(s)
Quoted: 835 Post(s)
Liked: 424
Ha. No and I have 8 boxes built at this point and it would be nice to have added that. Pulling the sub out is a PIA.
lemonslush is offline  
post #2392 of 5032 Old 11-08-2015, 04:26 PM
Senior Member
 
dchabby's Avatar
 
Join Date: Feb 2010
Posts: 218
Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 147 Post(s)
Liked: 95
this may have been asked or may be a 'duh' question but when connecting the rca sub pre-out from your avr to the inuke 3000dsp amp and going to run 2 subs, can you use an rca splitter rather than an xlr splitter ?
dchabby is offline  
post #2393 of 5032 Old 11-08-2015, 07:28 PM
AVS Forum Special Member
 
derrickdj1's Avatar
 
Join Date: Sep 2011
Posts: 3,767
Mentioned: 102 Post(s)
Tagged: 0 Thread(s)
Quoted: 1005 Post(s)
Liked: 767
Quote:
Originally Posted by dchabby View Post
this may have been asked or may be a 'duh' question but when connecting the rca sub pre-out from your avr to the inuke 3000dsp amp and going to run 2 subs, can you use an rca splitter rather than an xlr splitter ?
I use RCA splitters.
dchabby likes this.
derrickdj1 is offline  
post #2394 of 5032 Old 11-08-2015, 09:05 PM
AVS Forum Special Member
 
Augerhandle's Avatar
 
Join Date: Jan 2009
Location: About 25" away from my computer screen
Posts: 5,149
Mentioned: 27 Post(s)
Tagged: 0 Thread(s)
Quoted: 1158 Post(s)
Liked: 1143
Quote:
Originally Posted by dchabby View Post
this may have been asked or may be a 'duh' question but when connecting the rca sub pre-out from your avr to the inuke 3000dsp amp and going to run 2 subs, can you use an rca splitter rather than an xlr splitter ?

It doesn't matter, BUT you don't need to split it at all, and can save a few bucks.. You can go direct to input A and use Bi-Amp mode. Just don't engage the crossover.


Attached Thumbnails
Click image for larger version

Name:	Capture Bi-Amp.JPG
Views:	1480
Size:	80.6 KB
ID:	1046857  
dchabby likes this.

"The wise understand by themselves; fools follow the reports of others"-Tibetan Proverb
_____________________ http://www.scientificamerican.com/article/auger-handle/ ________________________

Last edited by Augerhandle; 11-08-2015 at 09:12 PM.
Augerhandle is offline  
post #2395 of 5032 Old 11-09-2015, 06:19 PM
Advanced Member
 
azz7686's Avatar
 
Join Date: Apr 2012
Location: Mansfield, Ohio
Posts: 668
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 279 Post(s)
Liked: 125
Whats the difference with xover on? Guess this is a duh question but I'm a little off when it comes this amp its a little over my head just need some more experience with it i guess but like learning here!

Spoiler!
azz7686 is offline  
post #2396 of 5032 Old 11-09-2015, 06:51 PM
AVS Forum Special Member
 
derrickdj1's Avatar
 
Join Date: Sep 2011
Posts: 3,767
Mentioned: 102 Post(s)
Tagged: 0 Thread(s)
Quoted: 1005 Post(s)
Liked: 767
The crossover tab is for setting a HPF or LPF. The HPF keeps a speaker from getting to low of a frequency and the LPF is the opposite. Most of us for sub duty don't use a LPF since this is done by the avr. Vented subs use hpf to protect the drive/speaker.
derrickdj1 is offline  
post #2397 of 5032 Old 11-09-2015, 06:56 PM
Advanced Member
 
azz7686's Avatar
 
Join Date: Apr 2012
Location: Mansfield, Ohio
Posts: 668
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 279 Post(s)
Liked: 125
Ok, sorry I do understand that but does it effect the single channel running both outputs? Sorry I wasn't more clear on what I do understand lol its been a long day!!!

Spoiler!
azz7686 is offline  
post #2398 of 5032 Old 11-09-2015, 07:51 PM
AVS Forum Special Member
 
Augerhandle's Avatar
 
Join Date: Jan 2009
Location: About 25" away from my computer screen
Posts: 5,149
Mentioned: 27 Post(s)
Tagged: 0 Thread(s)
Quoted: 1158 Post(s)
Liked: 1143
Quote:
Originally Posted by azz7686 View Post
Ok, sorry I do understand that but does it effect the single channel running both outputs? Sorry I wasn't more clear on what I do understand lol its been a long day!!!

It affects the Channel B output (as it should, in "normal" Bi-amp mode).


Turn it on, and it automatically sets Channel B crossed over as a tweeter (High Pass 3 gets linked to Low Pass 2), so it can't feed the 2nd sub the low frequencies. Clicking it off allows individual control of the HPF and LPF for each channel.


Attached Thumbnails
Click image for larger version

Name:	Capture Bi-Amp Locked.JPG
Views:	473
Size:	85.9 KB
ID:	1048665  
azz7686 likes this.

"The wise understand by themselves; fools follow the reports of others"-Tibetan Proverb
_____________________ http://www.scientificamerican.com/article/auger-handle/ ________________________
Augerhandle is offline  
post #2399 of 5032 Old 11-09-2015, 09:59 PM
Member
 
dexterblack's Avatar
 
Join Date: Aug 2007
Posts: 83
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 24 Post(s)
Liked: 10
I am building a minimarty. What is the best liner I can get from Walmart or Home Depot? Thanks.
dexterblack is offline  
post #2400 of 5032 Old 11-10-2015, 07:38 AM
AVS Forum Special Member
 
squiers007's Avatar
 
Join Date: May 2014
Location: Newport, OR
Posts: 1,697
Mentioned: 68 Post(s)
Tagged: 0 Thread(s)
Quoted: 789 Post(s)
Liked: 417
Quote:
Originally Posted by dexterblack View Post
I am building a minimarty. What is the best liner I can get from Walmart or Home Depot? Thanks.
Any cheap foam mattress topper will work. Just make sure it's not memory foam.

Check out my End-Table Marty Build
squiers007 is offline  
Sponsored Links
Advertisement
 
Reply DIY Speakers and Subs

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page


Forum Jump: 

Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off