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post #1 of 43 Old 02-23-2016, 08:21 PM - Thread Starter
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A Custom V.B.S.S. Build

My thanks to
@mtg90 for some cleverly and expertly applied science , his V.B.S.S. Intro a good and clear read

@LTD02 for his patience with my questions and his wizardry and wisdom

@cuzed2 for asking “what if” in his builds

I composed this start page from messages with LTD02, added some comments but the pictures have not been pasted along with the text so I'll be working on that cut and paste

Exterior dims: 42 x 18 x18, 3/4” , interior volume 9.5

The drivers are a single voice coil and are 8 ohm nominal spec. Two drivers would be wired in parallel, providing a 4 ohm load to the inuke.


Each of the four triangle ports should be 6" high x 6" wide x 12" deep.

I recessed that angled port side so that the insetting of the baffle and its thickness will give me that 12” port length . Not only did that side added a lot of bracing strength but it also gave me another attachment point . That length is about 8.5 inch” es so 4 ports is almost an extra 3 feet for PL and kreg screws .

I think that will give you a tune in the low 30's. The cabs should have good output above about 40hz up to whatever frequency you choose to cross them at.


A protective high pass filter in the inuke should be used around 30hz to keep the drivers from too much excursion below tune.


With a 100hz 4th order low pass filter and a 2nd order protective high pass filter, this is roughly what the sub will do connected to one channel of an inuke 6000dsp.

Roundover on ports is your discretion. I don't think it is really necessary.


As for bracing, the ports provide and interesting effect as you point out. Therefore a single window down the middle of the cab is probably all that is actually needed. That board could even be a solid piece of wood essentially making two side-by-side enclosures. Doing that would not change performance.

I asked wrt to damping, you can see why if you look at the pics in the original thread. The center bracing could be windowed and a pillow stapled across that bracing

One pillow in the center would be fine. Not even completely necessary in this design, but will allow for a higher crossover point if you want to experiment with that.

I'll pull more images from the PM's and get them up

The black and white is this: Maybe I can use an Ebony veneer 7 pieces on the unpainted potion of the baffle and use the grain , joined at angles, as an interesting (?) and motion generating contrast to the otherwise regularity and symmetry of the rectangles, circles and triangles.

artsy-fartsy - also sounds like a real headache


more pics /images to come
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eng-399, ORIF, cuzed2 and 1 others like this.

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
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post #2 of 43 Old 02-23-2016, 08:31 PM - Thread Starter
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some more images and info
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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
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post #3 of 43 Old 02-23-2016, 08:53 PM
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Quote:
Originally Posted by asarose247 View Post
The black and white is this: Maybe I can use an Ebony veneer 7 pieces on the unpainted potion of the baffle and use the grain , joined at angles, as an interesting (?) and motion generating contrast to the otherwise regularity and symmetry of the rectangles, circles and triangles.
I think it's almost already finished...the black and white is a black cab and a white baffle and call it...

Magic Eight Ball!

Technically it's a rectangular prism, but Magic Eight Rectangular Prism just doesn't have the same ring to it.
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post #4 of 43 Old 02-23-2016, 09:00 PM
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I like the look of your cabinet and how you did the ports on it Great job. Can't wait to see it all done. These VBSS put out some nice bass in the room. I think your going to be really happy with it.
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post #5 of 43 Old 02-24-2016, 07:56 AM
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Quote:
Originally Posted by eng-399 View Post
I like the look of your cabinet and how you did the ports on it Great job. Can't wait to see it all done. These VBSS put out some nice bass in the room. I think your going to be really happy with it.
asarose,

Some great details here thanks for sharing. I like the design, and will likely be borrowing some details (with your permission - of course) .
The graphs suggest some very impressive output ....

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post #6 of 43 Old 02-24-2016, 09:56 AM - Thread Starter
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John described this as a really good midbass unit , his modeling shows that

I'll take some bracing pics in a bit, I used 1/2 ply, screwed and glued.

for mounting the drivers, I backed up the 3/4" baffle with blocks of 1/2" solid oak, used gorilla glue and brads and then some PL that kept squirting out while I did the braces
To mount the drivers I'm using 1 1/4" Kreg screws for hardwood, so even with a 1/16th pilot hole into the oak, the fine thread will drill its self in without splitting and give a "no gasket leaks" bite. the gasket that comes on the driver seems adequate
I'm also putting a small washer under the truss head of the screws.
much easier than T-nuts but these drivers are not 50+ lb. UXL's either.


In a very obvious way, that is part of the beauty/value of mtg90's creation, availability of the driver and major bang for the bucks

my "idea" of fine lined veneer around the driver is to create a "radial emanation" effect , ya know, like a black hole (the driver) and an "event horizon" that fades into the black
NO! as a matter of fact I do not watch too much Science channel!

I'll be making a pass a the local Rockler later today wrt veneer questions

gonna borrow an idea or 2 , are ya?.
go ahead!
think you're the first guy to do that?
hope you can knock it outta the park . . .
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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
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post #7 of 43 Old 02-24-2016, 01:20 PM
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Quote:
Originally Posted by asarose247 View Post
John described this as a really good midbass unit , his modeling shows that

I'll take some bracing pics in a bit, I used 1/2 ply, screwed and glued.

for mounting the drivers, I backed up the 3/4" baffle with blocks of 1/2" solid oak, used gorilla glue and brads and then some PL that kept squirting out while I did the braces
To mount the drivers I'm using 1 1/4" Kreg screws for hardwood, so even with a 1/16th pilot hole into the oak, the fine thread will drill its self in without splitting and give a "no gasket leaks" bite. the gasket that comes on the driver seems adequate
I'm also putting a small washer under the truss head of the screws.
much easier than T-nuts but these drivers are not 50+ lb. UXL's either.


In a very obvious way, that is part of the beauty/value of mtg90's creation, availability of the driver and major bang for the bucks

my "idea" of fine lined veneer around the driver is to create a "radial emanation" effect , ya know, like a black hole (the driver) and an "event horizon" that fades into the black
NO! as a matter of fact I do not watch too much Science channel!

I'll be making a pass a the local Rockler later today wrt veneer questions

gonna borrow an idea or 2 , are ya?.
go ahead!
think you're the first guy to do that?
hope you can knock it outta the park . . .
Thanks! No question these are quite the value proposition.

I already have 2 mid-bass drivers up front. Therefore my next two VBSS' will also utilize the original mtg-90 tuning. So far; I have been running the first two VBSS' with one port plugged for a 15 Hz tune, and am getting the desired improvements at my MLP. Not sure if they are really that much better than the SVS cylinders? I suspect it is because the custom VBSS dimensions chosen, are allowing me to locate them in a position that is improving a null I had at my MLP.

For my next two VBSS';
will likely be going with 2 singles (co-located) "near-field", about 24~30", behind my seating, in the back of my room.
I know this location provides considerable room gain. They will be separate identical boxes, but will share a common hardwood top, and possibly a common shared removable grill? Need to decide, if I can adapt the triangular ports to the original VBSS tune.....?

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post #8 of 43 Old 02-24-2016, 01:22 PM
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These drivers would surprise some folks, they surprised me, even though BTH told me they'd pound.
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post #9 of 43 Old 02-24-2016, 01:55 PM - Thread Starter
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given the strength and stiffening of the port sides, each piece went in 3 pockets on each side
I added 5 braces, all 1/2" ply 4 are 14" long

2 join the 18 x 28 ends to the back
2 join the baffle to the back

the center back, angled is 24"

given the tight spacing between drivers, and many of the edges, just mounting the drivers is going to add of stiffeninbg

the red is what you have to look for should you peer deep into the port

on the baffle I spaced out 5 screws along the long edges and 2 along the short ends = 14

then I added 3 pockets to the ports sides tops that the baffle would lay down onx 4 = 12 more pockets
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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
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post #10 of 43 Old 02-25-2016, 02:24 AM
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Looks great! What are the running options for this V.B.S.S. design? It uses the Dayton PA-460, correct? I have always thought of the PA-460 as more of a pro audio mid bass driver, as used in this design, but someone mentioned above that it can be used as a subwoofer with a really low tune. Is this correct?
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post #11 of 43 Old 02-25-2016, 04:07 AM - Thread Starter
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^

check the AVS member @cuzed2 in post #7

and also the original as posted by @mtg90

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
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post #12 of 43 Old 02-25-2016, 01:12 PM - Thread Starter
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Building the ports into the box made it inherently stronger
and eliminated a structure to support tubes

i rarely use the corner attachment for the clamps but this is perfect.
notice the use of the stop block to keep position
PL will slide you out of spec when you're not looking

center pic is "stretching" a slight bow in the bottom piece so i could get the last 2 port sides to the mark
note the use of leveling wedges at the bottom inside to work it and my Tim "Tool Time" Allen hammer

and then prior to setting the baffle, added 3 more pockets to each portside piece to help hold it all together

wrt veneer idea best scenario is to make a full scale mock up and play with that
so in that interim, and many of us have read posts of "finishing" taking quite some time , YMMV

today I ran some duratex and should be mounting drivers FINALLY!
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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
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post #13 of 43 Old 02-25-2016, 03:02 PM
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Looking good!
Seeing these photos reminded me that I have a Kreg jig that I have never used!
Hmm..another excuse to build 2 more VBSS'
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post #14 of 43 Old 02-25-2016, 03:41 PM - Thread Starter
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several weeks back @kevings wanted to build 2 full marty's and he can be impatient

So I watched the video's posted by so generously by @chalugadp and got a real eyeful about construction and a few AH-HA! moments to boot . . .

compared to the learning curve from last year, yeah , learned a bit how not to be too much overboard

wrt Kreg system, after building 3 BFM THTLP's with 1/2"ply, and his plans totally cover it all

using 3/4" and (lotsa) kregs for building SUBMAXIMUS and the LHORNS should make you say thanks Bill for a real schooling in self discipline

if you have the squaring jigs and clamps and run your dry fits
for many the Kreg system is the onliest way for a lot of the work

be advised that sometimes the angular bite of the pocket as a screw seats in the other panel, you might set some shift,
so stop blocks and carefully planned clamping will keep you on the mark

wear disposable plastic gloves while working with the PL

get busy

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
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post #15 of 43 Old 02-25-2016, 03:59 PM
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Quote:
Originally Posted by asarose247 View Post
several weeks back @kevings wanted to build 2 full marty's and he can be impatient
Hey buddy, you are 100% right, and with that in mind, I once again wanted to say thanks for all of your help over the last couple of years.

New sub is looking Great! Please let me know once you get it wired up, since I'd love to stop by one night and check it out. Or if you need any help prior to that, with moving it into the house, setting it up or anything like that too, just give me a call.
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post #16 of 43 Old 02-25-2016, 06:34 PM - Thread Starter
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Hey Kev, thanks for the offer but this is a lightweight . . .

No time to fire it up tonight but tomorrow . .

and along with a well updated HTPC, ready to rock n' roll, yet to be installed in the rack,

NEW! in the upper right corner, on a full motion mount nonetheless, a 24" monitor

looking at it again, all of a sudden, the Fusion 15's look "small"

LOL
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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

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post #17 of 43 Old 02-26-2016, 09:55 PM
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Will,

The "Den of Madness" is looking VERY intimidating these days! Nice Job.

: )
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post #18 of 43 Old 02-27-2016, 11:21 AM - Thread Starter
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to clarify for @kevings sanity and peace of mind

this taken from about 6 ft in back of MLP, cell phone shot and plenty of bad lighting

you can see the TR at the top rh corner, and the TF, TM

the skeleton of the ATMOS cloud construct needs 2 more pieces

some room treatments

a Yoda pajamas thing that watches as you walk in, on the left side treatment panel

and some lazy retired guy who isn't fond of housekeeping but is making progress
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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
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post #19 of 43 Old 02-29-2016, 10:36 AM
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I just ordered a Plate Mini DSP plate amp for this build I have the 18 inch driver already and the Mini DSP mic.
I was looking at how I could budget two Rythmic lvr 12 subs after my avr took a crap i my budget was blown so i decided to make use of what i have and go from there to see how it sounds.
I would of went with a other amp that everyone was talking about but I have seen a lot of remarks about how loud the fan is. with the mini dsp built into the amp i can use my mic an laptop to tune the sub in.

Two questions is wear do i find the ports to use in this sub and the insulation.
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post #20 of 43 Old 02-29-2016, 11:12 AM - Thread Starter
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myself, using the inuuke6000dsp, the fan mode is a simple R & R except for a minor power source re connection but that's just a choice

I'll spend more time looking at things later but which actual amp did you get as a quick search to the site shows 6 plate amps

for my design, John did the math and instead of 4 "full length ports as at Parts Express, about $12 + each, we went with the triangular port shown/ described earlier in the thread but 4 ports was for a dual driver box, easier to make the wooden ports than support the tubes, at least for me, YMMV

the original VBSS thread is recommended reading and the PE ports explained well

the inukes have the dsp build in and go thru my HTPC and the separate 24" monitor hooked up for that function along with REW and an UMM-6 mike .

iirc the blue denim insulation used for damping , surf to Home Depot ,
I didn't recall how much is used so you may just need to order the 6 pack of it.

HTH

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
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post #21 of 43 Old 02-29-2016, 12:09 PM
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The min dsp plate amp use's a ICE type amp this is suppose to be a very good amp Reaction Subs use a ICE amps.
I also liked the idea of the amp being on the sub. If i could afford a more expensive block amp that was fanless to do this I would of but for what I was looking for i think it was the best way to go.

The good point of the INuke is you can run another sub on it but i just wanted to do this and then buy another one when i decide to get another driver for a second sub.
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post #22 of 43 Old 02-29-2016, 01:09 PM - Thread Starter
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@telon175

wrt 1 sub,

hope you have space to play wrt testing/ placement optimization for at least your mlp or primary seating arrangement.

you might do a thread and post room specs and volume, playback preferences and other HT equipment and any other info

there are plenty of folk here a lot of experience about putting it all together, they can be very helpful

i checked at the minisite and since you didn't mention the amp model, maybe the ice 125, at $295
and this strictly my own .02

for close to the same money or less
you get an inuke30000dsp, 2 channels of way more power for 2 subs easily, plenty of dsp power, and you can do the fan mod, easy pesy, using 1 noctua fan for <$20

and instead of having to buy a second amp, you "save" enough money to build that second sub "for free"

so you should now just cancel that plate amp . .just kidding

but it doesn't take much reading around this site to know that we are all here because it's about the power of choice

good luck with the build,

pics or it didn't happen

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
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post #23 of 43 Old 04-03-2016, 06:31 AM
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@asarose247

How would you compare this dual 18 cab to your 24" thtlp for music purposes?
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post #24 of 43 Old 04-03-2016, 12:40 PM - Thread Starter
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as modeled into this configuration for me by @LTD02 ,
the intent was to "help" more into the 35 ish to 90 ish range as a unit actually firing forward into the room, as the other subs are either even with or actually in back of the MLP, firing forward. i.e. "punch"
MAX is actually sitting nearfield about <4 ft behind me.
The fusion 15's very smooth and even as "small", XT32 set an xo of 40, totally adequate as stereo/ 2 channel listening, even without the subs (but except for a "test", never again, unless by request).. (think "Phantom of the Opera Remix" fine trouncing ditty

the 24" got shoved into the mancave , <110ft^2, after building the 2 x 30".
I think my over all 5Kft^3 house volume was just too much for 1 lonely THTLP
remembering that a larger THTLP is about a smoother and slightly deeper response, the 2 in my LR , sitting butt to butt each had the prescribed loading of 18" in a 14.5 wide room behind me.. shaken and stirred . . .and only EQ'd with YPAO (older 663) thru 2 x BASH 300's. iirc my 818 had an "on" relay issue since fixed ,free, and currently running the Scatmos right side tops.

While I'm currently trying to manage EQ all 4 subs thru the new minidsp 2 x 4HD, I can tomorrow put the whole thing in Stereo, turn down the gains for the 3 larger subs and see what things sound like.
The 24" never got to play with the F15's

based on the opinions of others, I'd venture to say that given a more adventurous attempt at placement and usage of REW wrt EQ, either with XT32, the Inuke Dsp controls or now thru the HD unit, that fact that the sub can take about 1K wattage makes me think, it should well kick down the walls and eat the THTLP's lunch
even a BASH 300 is way too much for a THTLP.

as for using science to discuss the mutual or exclusive benefit of an FLH vs, Ported, way above my paygrade

and the room. placement and all that, lots of variables

given that the original VBSS can be managed to get appreciably below 20, I'd be inclined to say that for the money and time to build either a THTLP (1/2" ply requires attentive craftsmanship, I think the driver as $280 ish)or 2 of the VBSS, 3/4 ply and a buttload of Kreg screws and drivers at <$100 each, an Inuke3000DSP
and 2 subs for room modes, placement options, all of that.

obviously I'm a bit behind the learning curve but I listen well

HTH

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
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post #25 of 43 Old 04-03-2016, 02:25 PM
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Thanks. I'm considering replacing a 24" thtlp with a pair of the pa460s. The extra extension of the tht isn't really needed for my application. I could put two pa460s in a smaller cab and get possibly better performance from 30hz and up. You are the only person I know of that has both.
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post #26 of 43 Old 04-03-2016, 02:46 PM - Thread Starter
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@Samps

"You are the only person I know of that has both. "

3 years ago I'd have been inclined to say "No way is that ever going to happen"

LOL

your idea of 2 in One smaller cab or the smaller cabs of the @mtg90 design?

@CUZ ed may have some updates /opinions on his 2 builds

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

Last edited by asarose247; 04-03-2016 at 02:48 PM. Reason: FFE I meant @cuzed
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post #27 of 43 Old 04-03-2016, 03:10 PM
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Mine would be a custom triangle shaped cab about 14 cubic feet. Smaller than the THTLP but more importantly a better shape. I would likely sell the THTLP. Not enough room. Plus I need something to build.
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post #28 of 43 Old 04-03-2016, 06:59 PM - Thread Starter
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JFTR:

3rd time a charm that's @cuzed2 .

Waiting to see the pics.

I understand fully wrt to gotta build something, discipline will get you past the "excitement" of "clouds" but not to far

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
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post #29 of 43 Old 04-04-2016, 06:31 AM
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Have you gotten any measurements since placing in your room? Wondering how this would compare to say a picowrecker.


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post #30 of 43 Old 04-04-2016, 09:46 PM - Thread Starter
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@BCRSS

I'm not familiar enuf with the picowreckers perf. to add anything wrt knowledgeable/ direct comparisons

As i'm trying to EQ 4 subs with the new 2 x 4HD, I'm expecting my build version to add in the 35 ish to 90 ish range, as worked out for me by @LTD02 , for a bit more mid bass "punch" as it is the only sub actually facing me at the mlp. I have the LPF set at 100 with a 24 dB BW rolloff. the HPF is at 30 with the same.

I will add that setting the X5200 to stereo and cutting off the other 3 subs, performance is really fine, the F15's are "large", full range, via XT32, going thru the various music channels wrt Direct TV, some bass drops and some EDM not with standing.
Not quite as room filling as I have a total connected volume of about 5Kft^3
but with the other 3, lots of rumble, concussive gun shots, etc, just like I wanted to get.

I'm sure to be posting in the 2x4HD thread once I resolve the update wrt "Sens factor" for my UMM6 mike

HTH

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
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