The V.B.S.S. DIY subwoofer design thread - Page 35 - AVS Forum | Home Theater Discussions And Reviews
Forum Jump: 
 840Likes
Reply
 
Thread Tools
post #1021 of 1620 Old 08-09-2018, 08:56 PM
Member
 
Join Date: Jun 2018
Posts: 25
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 6 Post(s)
Liked: 22
Quote:
Originally Posted by XJF View Post
I've followed most of the thread, can't wait to build my pair before the year's end. Does anyone have an idiot-proof checklist of supplies for building one? I'm mainly concerned about the wiring/cables/connectors needed to supply audio/power from my Denon 4300 -> iNuke1000Dsp -> VBSS.

Sent from my Moto Z (2) using Tapatalk
Here is a list I just made of what I bought/used during my build process. I won't call it an idiotproof checklist of supplies needed, but is what I got. May have some items missing but I tried to gather a list of purchases and used items. attached image

edit: found mistake on excel, used 2 total NOT 3 MDF 4x8's (so each sub used a 4x8 sheet)
Attached Thumbnails
Click image for larger version

Name:	VBSS list.png
Views:	148
Size:	244.9 KB
ID:	2439916  

Last edited by WickedDogs; 08-09-2018 at 09:05 PM. Reason: quick correction
WickedDogs is offline  
Sponsored Links
Advertisement
 
post #1022 of 1620 Old 08-09-2018, 09:14 PM
XJF
Newbie
 
XJF's Avatar
 
Join Date: Feb 2016
Posts: 13
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 10 Post(s)
Liked: 0
Quote:
Originally Posted by WickedDogs View Post
Here is a list I just made of what I bought/used during my build process. I won't call it an idiotproof checklist of supplies needed, but is what I got. May have some items missing but I tried to gather a list of purchases and used items. attached image

edit: found mistake on excel, used 2 total NOT 3 MDF 4x8's (so each sub used a 4x8 sheet)
Wow! Thanks! Any particular reason you chose the iNuke3000DSP over the 1000? Or just leaving room to expand?
It's funny everyone mentions Home Depot, I was a supervisor there for 4cyesrs up until this past June. I have an associate at my old store we called Lumber Joe, he's a woodworking genius, he built so much for the store while I was there. I showed him the diagrams on the front page and he said he'd make the boxes for me since he knows I'm not very... hands-on inclined...
Any particular reason I shouldn't have him seal the box? It looks to me like I can do everything I need to (add insulation, run wires, etc) through the woofer opening. Am I overlooking something?

Sent from my Moto Z (2) using Tapatalk
XJF is offline  
post #1023 of 1620 Old 08-09-2018, 09:35 PM
Member
 
Join Date: Jun 2018
Posts: 25
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 6 Post(s)
Liked: 22
Quote:
Originally Posted by XJF View Post
Wow! Thanks! Any particular reason you chose the iNuke3000DSP over the 1000? Or just leaving room to expand?
It's funny everyone mentions Home Depot, I was a supervisor there for 4cyesrs up until this past June. I have an associate at my old store we called Lumber Joe, he's a woodworking genius, he built so much for the store while I was there. I showed him the diagrams on the front page and he said he'd make the boxes for me since he knows I'm not very... hands-on inclined...
Any particular reason I shouldn't have him seal the box? It looks to me like I can do everything I need to (add insulation, run wires, etc) through the woofer opening. Am I overlooking something?

Sent from my Moto Z (2) using Tapatalk
Whoa that reminds me, also that list is missing the 1.5" foam topper I bought from walmart for ~$20, as well as the ~1.5ft of speaker wire inside each box to the terminal...sorry about that, it can be really hard to keep track of everything used after the fact!

I chose the 3000dsp for the sole reason of potential future expand-ability (it can power multiple vbss, once you have the right tools/knowledge that building more is cheaper per unit and easier to do). I figure for the extra $50 or so its worth it to me for that option. But this current space is large and open, its a TV room and kitchen roughly 80'x20'x15' and then open to the rest of the house so I'm never going to be able to pressurize the room/house. The 3000 is not necessary for 1-2.

If your friend is capable and willing to do it, then he can cut/assemble it, unless you want the experience of building the physical box yourself (which I personally enjoyed).

Oh and heads up: I had my boxes on cardboard when I glued them together to avoid making a mess, and the cardboard ended up sticking really hard to the boxes. Sanding aggressively took most (not all) of it away. I made many mistakes along the way, but the end result is so much fun and I'm happy I decided to go DIY.
biga6761 and vn800art like this.
WickedDogs is offline  
Sponsored Links
Advertisement
 
post #1024 of 1620 Old 08-14-2018, 05:44 PM
Senior Member
 
starcat's Avatar
 
Join Date: Apr 2006
Posts: 243
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 26 Post(s)
Liked: 21
Hi there,

how are four of these connected to a single iNuke 3000DSP channel?
Also, can I connect three of them to a single 3000DSP channel?

Thanks

Wanted: M&K Sound S-150P, INWALL S-150
Stereo Integrity HT18 D4 subwoofer drivers
starcat is offline  
post #1025 of 1620 Old 08-14-2018, 06:15 PM - Thread Starter
AVS Forum Special Member
 
mtg90's Avatar
 
Join Date: Aug 2011
Location: Millbrook, IL
Posts: 1,959
Mentioned: 595 Post(s)
Tagged: 0 Thread(s)
Quoted: 782 Post(s)
Liked: 1609
You connect the subwoofer drivers in parallel (+ to +, - to -), you can connect up to 4 per channel this way. So yes 1, 2, 3 or 4 per channel on the inuke 3000DSP.

Easiest way I have found to do this is to use bi-amp terminal cups that have two sets of binding posts. The two sets of binding posts on the terminal cup should be connected in parallel and to the woofer. This way one set can be the input from the amplifier and the other used as an output to connect to another subwoofer cabinet.
starcat and biga6761 like this.
mtg90 is offline  
post #1026 of 1620 Old 08-14-2018, 08:19 PM
AVS Forum Special Member
 
asarose247's Avatar
 
Join Date: Mar 2010
Location: DIY enabled in SoCal / OC
Posts: 4,425
Mentioned: 105 Post(s)
Tagged: 2 Thread(s)
Quoted: 1244 Post(s)
Liked: 1090
^ a very nifty insight. .

Parts Express Bi-Amp Speaker Terminal Cup Gold Banana Binding Post
Brand:Parts Express|Part # 260-281

DIY FAN Denon X4400 , ATI A 2000 for 7.4.6 SCATMOS Sammy 82" 4K/HDR
L/R: Fusion 15 V2 , C: 88 Special , SL/SR: 88 Special(V2) , RL/RR: F-3, TF/TR: Volt 6's TM: SLX, FH: F4Q4
SUBMAXIMUS V2, ,Submaximus V3,LOWARHORNCustom Dual Driver VBSS,2 x 6000DSP
asarose247 is offline  
post #1027 of 1620 Old 08-16-2018, 10:50 AM
Member
 
Join Date: Jan 2015
Location: Philly Burbs
Posts: 30
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 26 Post(s)
Liked: 11
I have a 1,700 cubic foot (the finished part) basement - I was originally planning on building an end table to house a sealed UM18-22 (or equivalent based on availability). The sub I would be replacing would be my Paradigm Monitor Sub 12, which I realize that anything I plan to replace it with will be a completely different animal. My question is, besides saving a few hundred $'s, is there any additional benefit of the VBSS with the PA460? The only reason I am asking is because it's difficult to compare the two systems via internet research alone - I am looking for opinions of people who may have heard both applications. I am trying to compare the UM18-22 chart from Data Bass, and any graphs that I've been able to find for the VBSS system. This is a mixed use space that I would guess is 70% HT and 30% music listening. I understand that the VBSS system is much cheaper and easier to add more down the road if need be, but for now it will be a single sub system based on the available space in the room. My 2 year old has invaded my "man cave" with his play area.

Long story short - is it worth savings a few hundred $'s with the VBSS, or am I giving something up specifically in the lower frequencies by not building the sealed UM18-22?

Thanks for any help!

TCL 65R - Marantz NR1603 - Focal 700 CC, Focal 706v, Paradigm Cinema 70, Paradigm Monitor Sub 12
dunnkm2 is offline  
post #1028 of 1620 Old 08-16-2018, 12:12 PM
AVS Forum Special Member
 
bscool's Avatar
 
Join Date: Mar 2013
Location: North Dakota
Posts: 1,416
Mentioned: 54 Post(s)
Tagged: 0 Thread(s)
Quoted: 889 Post(s)
Liked: 713
Quote:
Originally Posted by dunnkm2 View Post
I have a 1,700 cubic foot (the finished part) basement - I was originally planning on building an end table to house a sealed UM18-22 (or equivalent based on availability). The sub I would be replacing would be my Paradigm Monitor Sub 12, which I realize that anything I plan to replace it with will be a completely different animal. My question is, besides saving a few hundred $'s, is there any additional benefit of the VBSS with the PA460? The only reason I am asking is because it's difficult to compare the two systems via internet research alone - I am looking for opinions of people who may have heard both applications. I am trying to compare the UM18-22 chart from Data Bass, and any graphs that I've been able to find for the VBSS system. This is a mixed use space that I would guess is 70% HT and 30% music listening. I understand that the VBSS system is much cheaper and easier to add more down the road if need be, but for now it will be a single sub system based on the available space in the room. My 2 year old has invaded my "man cave" with his play area.

Long story short - is it worth savings a few hundred $'s with the VBSS, or am I giving something up specifically in the lower frequencies by not building the sealed UM18-22?

Thanks for any help!
For 70% HT I would go with the Um18s over the VBSS unless you can go with 2-4 of the VBSS. The VBSS will have more output from around 40hz up but that frequency range is easy to get. Plus a small room like you have the sealed should do well.

But everyone has different preferences. For music, I prefer the PA woofers but they lack the output down low that traditional sub can offer unless running multiples in large enclosures and going with more expensive drivers from B&C.

HTPC, Sony 40es, 120" Silver Ticket, 7702mkii, Sunfire Amp 225w, JBL 590, JBL 520

PSA XS30, Seaton Submersive, 2 Um-18 8cf sealed, Outlaw Ultra x 12, Kappa Pro 18LF, BFM Tuba 60 horn, B&C 18TBW100 6cf 41hz, 34hz, 28hz tune

iNuke 3000 & 6000 DSP's, Crowson Motion Actuator
bscool is offline  
post #1029 of 1620 Old 08-18-2018, 04:06 PM
Senior Member
 
starcat's Avatar
 
Join Date: Apr 2006
Posts: 243
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 26 Post(s)
Liked: 21
Hi Guys,

would you recommend going for a combination of

- two VBSS with PA460-8, both on a Nuke 3000DSP, and
- one UM18-22 subwoofer in order to maximize the low-end on a Nuke 3000DSP (something like this one)

I want to put both behind an acoustically transparent screen in my HT, the UM18-22 will go in the middle, the two VBSS on the sides below the mains L/R speakers.

I can tune the VBSS to 20 or 35Hz and leave the very low-end to the UM18-22.

Does that makes sense or is this a total waste of resources?

Thank you very much!
biga6761 likes this.

Wanted: M&K Sound S-150P, INWALL S-150
Stereo Integrity HT18 D4 subwoofer drivers
starcat is offline  
post #1030 of 1620 Old 08-18-2018, 04:51 PM
AVS Forum Special Member
 
Samps's Avatar
 
Join Date: Feb 2014
Location: Pittsburgh, PA
Posts: 2,740
Mentioned: 51 Post(s)
Tagged: 0 Thread(s)
Quoted: 1225 Post(s)
Liked: 904
It's a good plan. But two UM 18s tuned low would equal one 460 tuned high. 2 and 2 would be best. But it's still a good idea. The 460s will be cruising along if level matched with a single UM.
starcat and biga6761 like this.
Samps is offline  
post #1031 of 1620 Old 08-18-2018, 07:48 PM
AVS Forum Special Member
 
bscool's Avatar
 
Join Date: Mar 2013
Location: North Dakota
Posts: 1,416
Mentioned: 54 Post(s)
Tagged: 0 Thread(s)
Quoted: 889 Post(s)
Liked: 713
Quote:
Originally Posted by starcat View Post
Hi Guys,

would you recommend going for a combination of

- two VBSS with PA460-8, both on a Nuke 3000DSP, and
- one UM18-22 subwoofer in order to maximize the low-end on a Nuke 3000DSP (something like this one)

I want to put both behind an acoustically transparent screen in my HT, the UM18-22 will go in the middle, the two VBSS on the sides below the mains L/R speakers.

I can tune the VBSS to 20 or 35Hz and leave the very low-end to the UM18-22.

Does that makes sense or is this a total waste of resources?

Thank you very much!
You could use 1 Nu6000dsp and it might save you some money if you can find one new or used. Run the UM18 off of 1 channel and the 2 460 off the other channel. Unless you have another reason for using 2 of the Nu3000s.

Then in the future, if you upgrade you have the 6000 for 2 um18 and..............
starcat and biga6761 like this.

HTPC, Sony 40es, 120" Silver Ticket, 7702mkii, Sunfire Amp 225w, JBL 590, JBL 520

PSA XS30, Seaton Submersive, 2 Um-18 8cf sealed, Outlaw Ultra x 12, Kappa Pro 18LF, BFM Tuba 60 horn, B&C 18TBW100 6cf 41hz, 34hz, 28hz tune

iNuke 3000 & 6000 DSP's, Crowson Motion Actuator
bscool is offline  
post #1032 of 1620 Old 08-19-2018, 02:44 AM
Senior Member
 
starcat's Avatar
 
Join Date: Apr 2006
Posts: 243
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 26 Post(s)
Liked: 21
The idea one 6000dsp for 1x UM18 and 2x PA460 is very nice, saves rack space too, however both PA460 would be running of one channel with the same settings. The original idea with the two 3000dsp was to have more channels available and to be able control the subs separately. Does it make sense to have the PA460 on two separate channels with separate settings at all?


Considering this mixed setup 2x PA460 and 1x UM18-22 (Full Marty), would I be better off with only 2x UM18-22, or even only 2x PA460?

I would have physical space for max three subwoofers, thus I came up with the idea 2x PA460 and 1x UM18-22 between them, the original plan however was to run 2x PA460 only. If I have two subs I can take them off the ground and position them higher between the mains (lowering room modes, probably?).

Your ideas are highly appreciated, thanks!


Edit:
The other speakers in the setup are per channel the Miller & Kreisel S-150P/MPS-2510P powered monitors, they start at 80Hz -3dB. This is a dedicated smaller HT room with about 1800 cu ft in volume (12 x 22 x 6.5').

Wanted: M&K Sound S-150P, INWALL S-150
Stereo Integrity HT18 D4 subwoofer drivers

Last edited by starcat; 08-19-2018 at 04:04 AM.
starcat is offline  
post #1033 of 1620 Old 08-19-2018, 10:02 AM
AVS Forum Special Member
 
Ftoast's Avatar
 
Join Date: Dec 2013
Posts: 6,576
Mentioned: 102 Post(s)
Tagged: 1 Thread(s)
Quoted: 2688 Post(s)
Liked: 877
Spoiler!


If you're looking for the budget friendliness of the PA460 but want lows a little deeper and the EQ a bit flatter, the DCS450 might be a good option in the same box for only $25 more.

Just curious; if you have the budget and watts for a pair of Um18 subs, what are the negatives for that direction? Is there something those are kinda bad at, or is it mostly the price leap?

Easy $25 DIY black (or any color) ALR paint +$40-$50sprayer screen mix smooth/clean and very easy to learn spraying with little/no mess.
Simple $25-40 DIY black/dark-grey ambient-light rejecting screen, grab two things from a local store..mix..roll..done.
Quick <$250 dedicated black-fabric theater room "A store that sells blinds can help your picture more than a store that sells projectors many times." -bud16415

Last edited by Ftoast; 08-20-2018 at 05:42 AM.
Ftoast is offline  
post #1034 of 1620 Old 08-19-2018, 10:33 AM
Member
 
bafflesteppe's Avatar
 
Join Date: Jun 2016
Location: Baltimore, Maryland
Posts: 40
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 7 Post(s)
Liked: 4
The V.B.S.S. DIY subwoofer design thread

So I’ve been talked out of doing Full Martys using the UM18 since I’m mostly using them for music. I’ve read mixed reviews of using the original VBSS design with the PA460 for HT, but I thought you could plug a port and get a 15 Hz tuning in a snap ... I’m not looking at mind blowing listening levels, I just want a little LFE to get through when I actually have some friends over for a movie.

Not to mention my room isn’t huge (12.5’ x 32’ x 7’) so room gain will help. I’ll also be adding another VBSS in the future, so if I can make that one a bit larger to be able to handle the LFE, then so be it. I’m not really limited in space or WAF at all.


https://www.avsforum.com/forum/15-ge...topics/2958434
starcat likes this.
bafflesteppe is offline  
post #1035 of 1620 Old 08-19-2018, 10:38 AM
Advanced Member
 
Michael Mitten's Avatar
 
Join Date: Nov 2004
Posts: 628
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 206 Post(s)
Liked: 215
I ran a single sub for years and always had to deal with bad nulls and peaks. I now have dual subs and love it. The balance is soooo much better.
biga6761 and mikeTRON250LM like this.
Michael Mitten is offline  
post #1036 of 1620 Old 08-19-2018, 11:32 AM
AVS Forum Special Member
 
bscool's Avatar
 
Join Date: Mar 2013
Location: North Dakota
Posts: 1,416
Mentioned: 54 Post(s)
Tagged: 0 Thread(s)
Quoted: 889 Post(s)
Liked: 713
Quote:
Originally Posted by starcat View Post
The idea one 6000dsp for 1x UM18 and 2x PA460 is very nice, saves rack space too, however both PA460 would be running of one channel with the same settings. The original idea with the two 3000dsp was to have more channels available and to be able control the subs separately. Does it make sense to have the PA460 on two separate channels with separate settings at all?


Considering this mixed setup 2x PA460 and 1x UM18-22 (Full Marty), would I be better off with only 2x UM18-22, or even only 2x PA460?

I would have physical space for max three subwoofers, thus I came up with the idea 2x PA460 and 1x UM18-22 between them, the original plan however was to run 2x PA460 only. If I have two subs I can take them off the ground and position them higher between the mains (lowering room modes, probably?).

Your ideas are highly appreciated, thanks!


Edit:
The other speakers in the setup are per channel the Miller & Kreisel S-150P/MPS-2510P powered monitors, they start at 80Hz -3dB. This is a dedicated smaller HT room with about 1800 cu ft in volume (12 x 22 x 6.5').
I thought that was what you might have had in mind. It depends if your listening position is close to equal distance from the PA460s and the room fairly symmetrical? Then I would think having the same signal/DSP to the PA460 would be fine. It is nice to have the extra flexibility to adjust everything separately so that is up to you and if there is a big difference in distance from your listening position to each PA460 then I would lean towards having them on separate channels so you could adjust distance/DSP etc.

I see different people prefer different things as some prefer to DSP all subs together and some prefer to do each individually and then do a final as all as one sub.
starcat likes this.

HTPC, Sony 40es, 120" Silver Ticket, 7702mkii, Sunfire Amp 225w, JBL 590, JBL 520

PSA XS30, Seaton Submersive, 2 Um-18 8cf sealed, Outlaw Ultra x 12, Kappa Pro 18LF, BFM Tuba 60 horn, B&C 18TBW100 6cf 41hz, 34hz, 28hz tune

iNuke 3000 & 6000 DSP's, Crowson Motion Actuator

Last edited by bscool; 08-19-2018 at 11:38 AM.
bscool is offline  
post #1037 of 1620 Old 08-19-2018, 01:41 PM
Senior Member
 
starcat's Avatar
 
Join Date: Apr 2006
Posts: 243
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 26 Post(s)
Liked: 21
It looks as if I would be able to place 4 of the VBSS with the PA460-8 driver. Will stuff one port and tune to 15Hz, should give better bass and more value than two UM18-22 in Full Marty's, what do you think?

Will drive with two NU3000DSP.

Anyone knows minimum distance from the woofers to the screen, is there any?
Attached Thumbnails
Click image for larger version

Name:	screenshot_30.jpg
Views:	92
Size:	616.5 KB
ID:	2443692  

Wanted: M&K Sound S-150P, INWALL S-150
Stereo Integrity HT18 D4 subwoofer drivers
starcat is offline  
post #1038 of 1620 Old 08-19-2018, 10:33 PM
Member
 
joker927's Avatar
 
Join Date: Mar 2014
Posts: 61
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 48 Post(s)
Liked: 29
Oh man, someone in my exact same situation. I bought an inuke 6000 with the intention of having 1 or 2 VBSSs and a UM18. I have a very large open basement for the HT. I built 1 VBSS and placed it using the sub crawl method then EQd it. The output was really impressive. However the difference between my 4 seating positions was very noticeable. So I built a second VBSS. I didn't even put them on separate channels, meaning that they are EQd identically. The difference in seating positions has basically vanished. Most importantly, the pair is so loud and it hits so low that I don't believe I need the UM18 at all. Every room is different but I have a huge room so I would image that a normal HT would be more than OK for most folks at only 2 VBSS. For me, the next step is clearly not a UM18 or more VBSSs but instead it's EQing both subs individually for even flatter response. And in terms of money, it's room acoustic treatment that's the next best step, not another sub, especially not a UM18.
The 460 might not be designed to hit low but that's the beauty of the VBSS design. cheap, loud, low.
starcat and mikeTRON250LM like this.
joker927 is offline  
post #1039 of 1620 Old 08-20-2018, 02:51 AM
Senior Member
 
starcat's Avatar
 
Join Date: Apr 2006
Posts: 243
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 26 Post(s)
Liked: 21
Guys,

could you please help to make the box of the slot ported version of the VBSS with the PA460-8 driver shallower by 3" by increasing the width? Unfortunately my space where I want to put 4x of these has more width that depth.

Thanks very much in advance!

Wanted: M&K Sound S-150P, INWALL S-150
Stereo Integrity HT18 D4 subwoofer drivers

Last edited by starcat; 08-20-2018 at 04:45 AM.
starcat is offline  
post #1040 of 1620 Old 08-20-2018, 06:01 AM
AVS Forum Special Member
 
Ftoast's Avatar
 
Join Date: Dec 2013
Posts: 6,576
Mentioned: 102 Post(s)
Tagged: 1 Thread(s)
Quoted: 2688 Post(s)
Liked: 877
If you're keeping the same volume while decreasing depth and increasing width you'll want to aim for outside dimensions of 31.5"-tall, 28"-wide and 17" deep...with the slot port still full width but its height shortened to 1.25" and the same 28" length.

If you want just the 15hz port tuning (instead of both 15 and higher with one or both sides open) then the height should be shorter at 53/64" (or 0.83") and the port length longer at 32".
starcat likes this.

Easy $25 DIY black (or any color) ALR paint +$40-$50sprayer screen mix smooth/clean and very easy to learn spraying with little/no mess.
Simple $25-40 DIY black/dark-grey ambient-light rejecting screen, grab two things from a local store..mix..roll..done.
Quick <$250 dedicated black-fabric theater room "A store that sells blinds can help your picture more than a store that sells projectors many times." -bud16415

Last edited by Ftoast; 08-20-2018 at 06:25 AM. Reason: Goofed inner dimension math
Ftoast is offline  
post #1041 of 1620 Old 08-20-2018, 07:21 AM
Senior Member
 
starcat's Avatar
 
Join Date: Apr 2006
Posts: 243
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 26 Post(s)
Liked: 21
Ftoast, thank you very much!
The dimensions are just perfect!


One more question though, can I put a 2nd 1/2" baffle in front in order the recess the driver?
This of course will lengthen the port by 1/2" - should I decrease the length in the back by 1/2"?

As regard to the tuning frequency, I will do 15Hz, but probably keep the possibility open to be able to tune higher by stuffing one of the ports, if there are no pros to have it fixed at 15Hz?


Thanks again!

Wanted: M&K Sound S-150P, INWALL S-150
Stereo Integrity HT18 D4 subwoofer drivers

Last edited by starcat; 08-20-2018 at 09:37 AM.
starcat is offline  
post #1042 of 1620 Old 08-20-2018, 10:15 AM
Senior Member
 
Join Date: Jan 2017
Posts: 366
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 145 Post(s)
Liked: 71
But .... I have a question: if using the rail slotted version, is there a way to identically (~) close one to tune lower (higher ?) the box? Or, with the slotted version we lose the possibility to tune ?
Regards
Alessandro

Marantz Sr7011, Galactron Mk10b, Pioneer VsxLx50. Klipsch Cornwall, Wharfedale 9.1, Klipsch CP-6. Sony UbpX800, Lg Up970, Hisense 55M5500. 110 inches rolling screen, excelvan cl720d.
vn800art is offline  
post #1043 of 1620 Old 08-20-2018, 11:45 AM
Senior Member
 
starcat's Avatar
 
Join Date: Apr 2006
Posts: 243
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 26 Post(s)
Liked: 21
The V.B.S.S. DIY subwoofer design thread

Quote:
Originally Posted by vn800art View Post
But .... I have a question: if using the rail slotted version, is there a way to identically (~) close one to tune lower (higher ?) the box? Or, with the slotted version we lose the possibility to tune ?

Regards

Alessandro
You can tune it exactly the same way as the original version.
Ftoast and vn800art like this.

Wanted: M&K Sound S-150P, INWALL S-150
Stereo Integrity HT18 D4 subwoofer drivers

Last edited by starcat; 08-20-2018 at 12:49 PM.
starcat is offline  
post #1044 of 1620 Old 08-20-2018, 05:08 PM - Thread Starter
AVS Forum Special Member
 
mtg90's Avatar
 
Join Date: Aug 2011
Location: Millbrook, IL
Posts: 1,959
Mentioned: 595 Post(s)
Tagged: 0 Thread(s)
Quoted: 782 Post(s)
Liked: 1609
Stuff a rolled up towel in one of the slot ports if you want to close one off, doesn't need to be 100% air tight.
Ftoast, biga6761 and vn800art like this.
mtg90 is offline  
post #1045 of 1620 Old 08-20-2018, 05:34 PM
Senior Member
 
starcat's Avatar
 
Join Date: Apr 2006
Posts: 243
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 26 Post(s)
Liked: 21
Quote:
Originally Posted by Ftoast View Post
If you're keeping the same volume while decreasing depth and increasing width you'll want to aim for outside dimensions of 31.5"-tall, 28"-wide and 17" deep...with the slot port still full width but its height shortened to 1.25" and the same 28" length.

If you want just the 15hz port tuning (instead of both 15 and higher with one or both sides open) then the height should be shorter at 53/64" (or 0.83") and the port length longer at 32".
This one turned out really well and four of them fit my space just perfect. I added a 1/2" front baffle for recessed driver mount (so 17.5" depth now) by keeping the same volume and the port length at 28" by 1.25" height.

Thanks very much.
Attached Thumbnails
Click image for larger version

Name:	screenshot_05.jpg
Views:	72
Size:	365.0 KB
ID:	2444202   Click image for larger version

Name:	screenshot_09.jpg
Views:	71
Size:	580.2 KB
ID:	2444210   Click image for larger version

Name:	screenshot_12.jpg
Views:	67
Size:	647.0 KB
ID:	2444212  
kagtha likes this.

Wanted: M&K Sound S-150P, INWALL S-150
Stereo Integrity HT18 D4 subwoofer drivers

Last edited by starcat; 08-20-2018 at 05:39 PM.
starcat is offline  
post #1046 of 1620 Old 08-20-2018, 06:01 PM
Advanced Member
 
mikeTRON250LM's Avatar
 
Join Date: Jan 2017
Location: Dallas, Texas
Posts: 862
Mentioned: 8 Post(s)
Tagged: 0 Thread(s)
Quoted: 419 Post(s)
Liked: 345
Quote:
Originally Posted by joker927 View Post
Oh man, someone in my exact same situation. I bought an inuke 6000 with the intention of having 1 or 2 VBSSs and a UM18. I have a very large open basement for the HT. I built 1 VBSS and placed it using the sub crawl method then EQd it. The output was really impressive. However the difference between my 4 seating positions was very noticeable. So I built a second VBSS. I didn't even put them on separate channels, meaning that they are EQd identically. The difference in seating positions has basically vanished. Most importantly, the pair is so loud and it hits so low that I don't believe I need the UM18 at all. Every room is different but I have a huge room so I would image that a normal HT would be more than OK for most folks at only 2 VBSS. For me, the next step is clearly not a UM18 or more VBSSs but instead it's EQing both subs individually for even flatter response. And in terms of money, it's room acoustic treatment that's the next best step, not another sub, especially not a UM18.
The 460 might not be designed to hit low but that's the beauty of the VBSS design. cheap, loud, low.
I did the same thing but I built 2 expecting to build at least 2 more (since they are so cheap). After getting them up and running there is NO WAY the wife would let me have more output in this room than the pair has
mikeTRON250LM is offline  
post #1047 of 1620 Old 08-20-2018, 06:38 PM
Senior Member
 
starcat's Avatar
 
Join Date: Apr 2006
Posts: 243
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 26 Post(s)
Liked: 21
Quote:
Originally Posted by mikeTRON250LM View Post
I did the same thing but I built 2 expecting to build at least 2 more (since they are so cheap). After getting them up and running there is NO WAY the wife would let me have more output in this room than the pair has
Isn't that one can go lower in frequency and get flatter response with more of them, not necessary higher *overall* volume?

Wanted: M&K Sound S-150P, INWALL S-150
Stereo Integrity HT18 D4 subwoofer drivers

Last edited by starcat; 08-20-2018 at 06:41 PM.
starcat is offline  
post #1048 of 1620 Old 08-20-2018, 07:45 PM
Member
 
bafflesteppe's Avatar
 
Join Date: Jun 2016
Location: Baltimore, Maryland
Posts: 40
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 7 Post(s)
Liked: 4
Quote:
Originally Posted by mikeTRON250LM View Post
I did the same thing but I built 2 expecting to build at least 2 more (since they are so cheap). After getting them up and running there is NO WAY the wife would let me have more output in this room than the pair has

Thanks for the confirmation, fellas—I’ll just go right ahead and build two PA460 VBSS.




https://www.avsforum.com/forum/15-ge...topics/2958434
starcat likes this.
bafflesteppe is offline  
post #1049 of 1620 Old 08-20-2018, 07:48 PM
Advanced Member
 
mikeTRON250LM's Avatar
 
Join Date: Jan 2017
Location: Dallas, Texas
Posts: 862
Mentioned: 8 Post(s)
Tagged: 0 Thread(s)
Quoted: 419 Post(s)
Liked: 345
Quote:
Originally Posted by starcat View Post
Isn't that one can go lower in frequency and get flatter response with more of them, not necessary higher *overall* volume?
No, the overall output across the entire range increases. This is why having 30 subs barely being pushed is better than one pushing too hard and distorting. Also this is why it's easier to create a ton of headroom then chop whatever peaks you have off to have a flat response.
starcat and breadysmith like this.

Last edited by mikeTRON250LM; 08-20-2018 at 07:51 PM.
mikeTRON250LM is offline  
post #1050 of 1620 Old 08-20-2018, 08:07 PM
Member
 
breadysmith's Avatar
 
Join Date: Jun 2011
Posts: 36
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 16 Post(s)
Liked: 45
I was able to get the bracing figured out (thanks to LTD02) and cut most of the baffles the circle jig my neighbor had and his router proved to make the process very easy...two of them ended up being learning experiences and will have to be redone! But it went together really well...my cuts proved to be pretty dead on so things were very snug when assembling them, just added some Titebond III. Here are few pics of the progress. My little girls thought they were awesome! I still have 2 more to finish up the bracing and baffles on. Then it's on to adding the connections and ultimately finishing them off with duratex.

Doing 8 of these things takes longer than I anticipated...though I do have 4 little kids that like to take up a good amount of my free time.

I am still very much enjoying the process!

I very much regretted doing all those baffles in my garage as it took me about 2 hours to clean all that mdf dust up and clean off everything it coated...lesson learned.
Attached Thumbnails
Click image for larger version

Name:	VBSS Bracing.png
Views:	88
Size:	33.1 KB
ID:	2444250   Click image for larger version

Name:	IMG_4075.JPG
Views:	89
Size:	2.00 MB
ID:	2444252   Click image for larger version

Name:	IMG_4077.JPG
Views:	82
Size:	2.89 MB
ID:	2444254   Click image for larger version

Name:	IMG_4079.JPG
Views:	82
Size:	2.24 MB
ID:	2444256   Click image for larger version

Name:	IMG_4081.JPG
Views:	83
Size:	1.51 MB
ID:	2444258  

Click image for larger version

Name:	IMG_4082.JPG
Views:	83
Size:	1.27 MB
ID:	2444260   Click image for larger version

Name:	IMG_4090.JPG
Views:	95
Size:	1.07 MB
ID:	2444262   Click image for larger version

Name:	IMG_4097.JPG
Views:	102
Size:	1.19 MB
ID:	2444264  

Last edited by breadysmith; 08-20-2018 at 08:13 PM.
breadysmith 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