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post #121 of 234 Old 03-17-2016, 09:04 AM
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Originally Posted by ddigler View Post
Glad you stopped by cuzed! HT going to be dry walled then painted next week then I have the stage to build and then these things get setup! Will definitely be posting back in a couple weeks once I get them rolling! The build went well and the subs are 100% complete.

So you have a couple Subs with these drivers? Do you like them?
@ddigler

Before I learned of the VBSS project; I had been relying on 3-SVS 16 Hz cylinders (2 powered 16-46s, and a passive 20-39 plugged for a 16Hz tune). With that arrangement; I still needed butt-shakers to get the feel I was looking for.

I am currently running the pair of VBSS with just two of the 16-46s; At this point; I am far ahead of the old arrangement and no longer feel the need for butt shakers (and my seating is on a carpeted concrete slab).

I am now thinking of adding 2 more VBSS (for a total of 4), and selling all of the cylinders
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post #122 of 234 Old 03-17-2016, 09:43 AM
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^

What size is your room?

Hopefully selling those SVS cylinders will easily fund the VBSS build and leave you with some spending money.

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post #123 of 234 Old 03-17-2016, 09:58 AM
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^

What size is your room?

Hopefully selling those SVS cylinders will easily fund the VBSS build and leave you with some spending money.
I have an open floor plan basement and need all of sub-woofage I can afford, to squeeze in.
920 total sq', about 7300 cu '

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post #124 of 234 Old 03-17-2016, 10:08 AM
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I have an open floor plan basement and need all of sub-woofage I can afford, to squeeze in.
920 total sq', about 7300 cu '
Does what you have now pressurize your space? My basement is 1100sqft with 9' ceilings and it's open to the upstairs to boot. It's hopeless for me. My sealed subs make the basement like a giant bandpass box!
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post #125 of 234 Old 03-17-2016, 10:41 AM - Thread Starter
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Quote:
Originally Posted by cuzed2 View Post
I have an open floor plan basement and need all of sub-woofage I can afford, to squeeze in.
920 total sq', about 7300 cu '
Does what you have now pressurize your space? My basement is 1100sqft with 9' ceilings and it's open to the upstairs to boot. It's hopeless for me. My sealed subs make the basement like a giant bandpass box!
The back of my HT has a large arch open to the rest of the basement. Hope it doesn't mess things up both for my sw and speakers. It was a design choice allowing easy access in and out of the HT but sounds like its going to come with tradeoffs acoustically; how severe the trade-offs are remains to be seen...
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post #126 of 234 Old 03-17-2016, 10:54 AM - Thread Starter
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Quote:
Originally Posted by ddigler View Post
Glad you stopped by cuzed! HT going to be dry walled then painted next week then I have the stage to build and then these things get setup! Will definitely be posting back in a couple weeks once I get them rolling! The build went well and the subs are 100% complete.

So you have a couple Subs with these drivers? Do you like them?
@ddigler

Before I learned of the VBSS project; I had been relying on 3-SVS 16 Hz cylinders (2 powered 16-46s, and a passive 20-39 plugged for a 16Hz tune). With that arrangement; I still needed butt-shakers to get the feel I was looking for.

I am currently running the pair of VBSS with just two of the 16-46s; At this point; I am far ahead of the old arrangement and no longer feel the need for butt shakers (and my seating is on a carpeted concrete slab).

I am now thinking of adding 2 more VBSS (for a total of 4), and selling all of the cylinders
Glad to hear the VBSS are treating you well!
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post #127 of 234 Old 03-17-2016, 12:32 PM
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Glad to hear the VBSS are treating you well!
ddidgler,
You're going to love these! How many total cu' in your space (with that arched opening)?

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post #128 of 234 Old 03-18-2016, 06:26 AM - Thread Starter
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Glad to hear the VBSS are treating you well!
ddidgler,
You're going to love these! How many total cu' in your space (with that arched opening)?
So you want me to include the side of the basement that's open on the opposite side of the arch? Or just the theater itself inside of the arch?
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post #129 of 234 Old 03-18-2016, 08:24 AM
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So you want me to include the side of the basement that's open on the opposite side of the arch? Or just the theater itself inside of the arch?
Yep! Include the adjoining area that is connected via that open archway.

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post #130 of 234 Old 03-18-2016, 08:38 AM - Thread Starter
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So you want me to include the side of the basement that's open on the opposite side of the arch? Or just the theater itself inside of the arch?
Yep! Include the adjoining area that is connected via that open archway.
Approx 4800
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post #131 of 234 Old 03-18-2016, 03:05 PM
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With "only" 4800 cu' to pressurize ; I am sure those 6 VBSS' will definitely bring a smile to your face !!

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post #132 of 234 Old 03-18-2016, 03:29 PM
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Quote:
Originally Posted by ddigler View Post
So you want me to include the side of the basement that's open on the opposite side of the arch? Or just the theater itself inside of the arch?
Quote:
Originally Posted by cuzed2 View Post
Yep! Include the adjoining area that is connected via that open archway.
Quote:
Originally Posted by ddigler View Post
Approx 4800
I'm curious to what the cu. ft. space is inside the theater room. Let's assume the archway is closed off, what would the space then be?

------------------------------------------------
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Front Stage : L/R - Statements by Jim Holtz
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Subwooferage : 6 UM18/4 HT18 Subwoofer Log
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post #133 of 234 Old 03-18-2016, 07:43 PM - Thread Starter
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With "only" 4800 cu' to pressurize ; I am sure those 6 VBSS' will definitely bring a smile to your face !!
Great! The subs are in storage until construction of the ht is complete. Killing me hehe
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post #134 of 234 Old 03-18-2016, 07:51 PM - Thread Starter
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Originally Posted by bgtighe23 View Post
Quote:
Originally Posted by ddigler View Post
So you want me to include the side of the basement that's open on the opposite side of the arch? Or just the theater itself inside of the arch?
Quote:
Originally Posted by cuzed2 View Post
Yep! Include the adjoining area that is connected via that open archway.
Quote:
Originally Posted by ddigler View Post
Approx 4800
I'm curious to what the cu. ft. space is inside the theater room. Let's assume the archway is closed off, what would the space then be?
My ht itself will be approx 3300cf
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post #135 of 234 Old 04-18-2016, 10:23 AM - Thread Starter
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Originally Posted by LTD02 View Post
"how will my large 8' w x approx 6-7'h archway in the back of the room (opposite wall of the Rexus setup) affect things?"


no real simple way to answer that question. have to see how it measures and go from there.
Hi all, quick update: DiggsRexus array is still in storage, complete, waiting... Things are progressing well on the build but it is MUCH slower than I anticipated.

In ref to the room, wanted to note that I am going with a completely enclosed room now. The arch is gone and has been replaced with a steel door 30"x80" as has the opening at the bottom of the stairs. Final room dimensions are 14'w x 24'l. Hope this improves things acoustically!
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post #136 of 234 Old 04-24-2016, 02:39 PM
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it was asked how this system would compare to some of the other drivers mention.


1w response of a handful of systems (at prices on p.e. at the moment)


6 x pa460 (red) $540
3 x pa465 (green) $660
2 x um18 (black) $558
2 x 460ho (blue) $524

all in the same cabs ~11cf tuned to ~17.5hz. i don't like the way the pa465 (green) is modeling, but ymmv.


One question about the red curve....Why is this system interesting seeing that the curve is not flat? is not the flatness what we are looking for?

Last edited by rggomez; 04-24-2016 at 02:43 PM.
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post #137 of 234 Old 04-24-2016, 03:23 PM
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You can eq down the rising response to make the red line flat. That will allow the PA460 to cruise along with lower excursion and lower power requirements. More area under the line is good. A lot of high Xmax subs roll off on the upper end and need some boost to get flat. A rising response is great as long as you get the low end you're after.
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post #138 of 234 Old 04-25-2016, 07:07 AM - Thread Starter
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the overhang on the driver is 6mm. using that as the excursion limit gives the black line.
discussions with mtg90 and driver measurement indicate that the useful excursion is somewhere around 9.5mm or possibly a little more. that gives the red line.
two pi space. no room gain. 6 subs.


Hi @LTD02 - In anticipation of finishing my HT I was reviewing your models in this thread. Is it fair to say based on this model that we may be able to achieve in excess of 112db from 15hz and up with the Rexus array or are these models just theoretical?
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post #139 of 234 Old 04-25-2016, 01:58 PM
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You can eq down the rising response to make the red line flat. That will allow the PA460 to cruise along with lower excursion and lower power requirements. More area under the line is good. A lot of high Xmax subs roll off on the upper end and need some boost to get flat. A rising response is great as long as you get the low end you're after.
agree but then, what is the advantage of using this kind of drivers if you need to attenuate the response?
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post #140 of 234 Old 04-25-2016, 02:48 PM
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agree but then, what is the advantage of using this kind of drivers if you need to attenuate the response?
From what I've learned, you need to manage your response and delay per sub (unless they are co-located and act as one) in room with EQ and/or Audyssey auto correction system regardless. Very rarely can you get perfectly flat bass with placement alone.
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post #141 of 234 Old 04-25-2016, 06:57 PM
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Hi @LTD02 - In anticipation of finishing my HT I was reviewing your models in this thread. Is it fair to say based on this model that we may be able to achieve in excess of 112db from 15hz and up with the Rexus array or are these models just theoretical?
the models are theoretical, but do correspond reasonably well to the physical phenomenon that they were developed to explain. most folks pick up quite a bit of room gain below about 30hz. the winisd model is for 2pi space which is akin to measuring outdoors. given your setup, I would expect that you will have some gain in your room that will boost the low end and achieve results that are a little higher than what is shown in those models. those are also going at max output and it is never a good idea to push the subs to their limits. as a comparison, in your room, you should have more (and deeper) bass than any movie theater that you have ever been to.

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post #142 of 234 Old 04-25-2016, 07:08 PM - Thread Starter
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Talking

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Originally Posted by LTD02 View Post
the models are theoretical, but do correspond reasonably well to the physical phenomenon that they were developed to explain. most folks pick up quite a bit of room gain below about 30hz. the winisd model is for 2pi space which is akin to measuring outdoors. given your setup, I would expect that you will have some gain in your room that will boost the low end and achieve results that are a little higher than what is shown in those models. those are also going at max output and it is never a good idea to push the subs to their limits. as a comparison, in your room, you should have more (and deeper) bass than any movie theater that you have ever been to.
Nice thx for the explanation LTD! Now I just have to make it through room construction alive haha. The subs were more fun than this room!
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post #143 of 234 Old 04-25-2016, 07:16 PM
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just a reminder...be sure to have the protective high pass filter in place before firing them up. don't want to see any damaged drivers...

Listen. It's All Good.
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post #144 of 234 Old 04-25-2016, 07:25 PM - Thread Starter
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just a reminder...be sure to have the protective high pass filter in place before firing them up. don't want to see any damaged drivers...
Still prob at least a month out from firing them up and thx for the reminder. I'll def get in touch b4 I fire them up.
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post #145 of 234 Old 05-19-2016, 07:49 AM - Thread Starter
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@LTD02 - Hi John, in anticipation for memorial day sales I plan to buy a bunch of random connectors over the weekend. Is this the connector I should be using to hook the speaker wire to my subs?

This one or a dif one?
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post #146 of 234 Old 05-19-2016, 08:55 AM
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@LTD02 - Hi John, in anticipation for memorial day sales I plan to buy a bunch of random connectors over the weekend. Is this the connector I should be using to hook the speaker wire to my subs?

This one or a dif one?

yes, that works.

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post #147 of 234 Old 05-19-2016, 09:50 AM - Thread Starter
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post #148 of 234 Old 06-19-2016, 06:39 PM
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Any updates?
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post #149 of 234 Old 06-20-2016, 06:23 AM - Thread Starter
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Any updates?
Hi Race - so here's where i'm at: Drywall within 2 weeks and then i finally get to hook them up and test the Rexus SW array! Very excited and will make sure to check back at that time. For the moment the room construction has taken priority and the subs are still in storage.

thx for checking in!
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post #150 of 234 Old 07-13-2016, 05:06 PM
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...tick...tock...


...tick...tock...

:-)

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