Quad submaximus v3 build thread - AVS Forum | Home Theater Discussions And Reviews
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post #1 of 260 Old 02-25-2017, 04:20 AM - Thread Starter
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Quad submaximus v3 build thread

So after talking to a few members I've decided to scratch the idea of going with 6 ported boxes and am going to be building 4 submaximus v3s. I'll be starting this build sometime this week. I still have to go and pick up a ton of plywood for this. The plan is to have these layed down on there side and firing out the edge of the baffle wall . They will be stacked 2 on each side. This should be inte interesting it's my first sub build so I said might as well push myself. I'll keep pictures coming as I progress through the build

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post #2 of 260 Old 02-25-2017, 05:41 AM
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Just curious but why are you using the DS4 drivers for this sub?
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post #3 of 260 Old 02-25-2017, 05:42 AM
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Four of those surely will be an experience.

Have you considered selling the DS4s and trying to find a pair of UXLs? I haven't checked the numbers but a pair of UXLs might come close to equaling the four DS4s in this cab.
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post #4 of 260 Old 02-25-2017, 05:42 AM
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Very ambitious for your first sub build. I like it!
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post #5 of 260 Old 02-25-2017, 05:45 AM
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post #6 of 260 Old 02-25-2017, 05:53 AM - Thread Starter
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I'm actually using the um 18s . I'm selling the ds4s today. The ums dont model quite as well but I already have them purchased

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post #7 of 260 Old 02-25-2017, 06:00 AM
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Cool. The UM18 model looks a lot better than the DS4.

You realize this is going to be insane, and possibly destructive to your home?

Mid 130s at 20hz is no joke.

Of course you should proceed.
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post #8 of 260 Old 02-25-2017, 06:21 AM - Thread Starter
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Quote:
Originally Posted by Samps View Post
Cool. The UM18 model looks a lot better than the DS4.

You realize this is going to be insane, and possibly destructive to your home?

Mid 130s at 20hz is no joke.

Of course you should proceed.
Lol yeah you can never have to much bass . going this path is a win win for me as my room sits there is no visible speakers so this will keep everything hidden instead of having to mini Marty's by the rear bar. It is also saving Me about 750 dollars and is going to kill the output I would have got with the 6 ported boxes


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post #9 of 260 Old 02-25-2017, 06:48 AM - Thread Starter
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Nice 4 submaximus's subscribed
Yeah should be fun. I wanna hear how you like the b&c drivers once you get them done

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post #10 of 260 Old 02-25-2017, 07:32 AM - Thread Starter
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Is this a suitable plywood for the v3s

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post #11 of 260 Old 02-25-2017, 09:10 AM
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These subs will be insane. I'm sooooo glad your going this direction. I hope that ply is a good option the price isn't too killer.
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post #12 of 260 Old 02-25-2017, 09:27 AM
 
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Originally Posted by hd0823 View Post


Is this a suitable plywood for the v3s

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Yes...
And This is gonna be AWESOME. So happy you decided to follow through with this idea
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post #13 of 260 Old 02-25-2017, 09:34 AM - Thread Starter
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Actually selling my 2 ds4s in a couple hrs and going to go buy all the wood. You said you got away with 4 sheets each box right

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post #14 of 260 Old 02-25-2017, 09:38 AM - Thread Starter
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These subs will be insane. I'm sooooo glad your going this direction. I hope that ply is a good option the price isn't too killer.
Yeah the price sucks but if you buy 10 or more the price drops to 37 and than today's the last day for mensrds 11 percent sale so it's like 33 a sheet. So after I leave Brian's I'm going to go put the order in for 16 sheets. Probably go and pick them up tomorrow

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post #15 of 260 Old 02-25-2017, 11:05 AM
 
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Actually selling my 2 ds4s in a couple hrs and going to go buy all the wood. You said you got away with 4 sheets each box right

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Yes 4 sheets each.
Gouie just left from picking up my 1099's.. Sad to see them go, but excited for titan's.
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post #16 of 260 Old 02-25-2017, 11:07 AM - Thread Starter
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Yes 4 sheets each.
Gouie just left from picking up my 1099's.. Sad to see them go, but excited for titan's.
I definitely think you'll love the titans with them being a pro cinema style speaker. I absolutely love how my qsc 2150s sound

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post #17 of 260 Old 02-25-2017, 12:09 PM
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Originally Posted by hd0823 View Post


Is this a suitable plywood for the v3s

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This is the plywood I am using for my sub cabinet build (currently underway). It's just called Sanded Plywood at Home Depot. Same price. (aka Arauco)

The main reason I'm using it is because of how much lighter it is than MDF. Feels like half the weight per sheet or something crazy. I could never find density or weight specs anywhere though and i haven't weighed it myself. A second reason is the looks, instead of paint or veneer, I'm just going to put a finish on the wood and I think it will look really good.

Anyway, one warning from my initial cuts - there were numerous voids in the inner layers of the plywood. Most small, but when using the router i had to cut an extra 16" to get past a part with some voids that was a good inch or two in size. Also, some of my straight cuts left small <1 inch voids in some of the edges along inner layers.

I read that it is best to avoid plywood with voids for subwoofer cabinets and that birch is the preferred material ($10 more per sheet). BUT, so far it hasn't been a problem for me, I'm going to keep going with what I have and I don't have any actual reason to think these won't work just fine for our purposes. Just passing on the info.

Note: I spent a good amount of time picking out 3 sheets that looked nice and clean with straight edges etc.

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post #18 of 260 Old 02-25-2017, 12:19 PM
 
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That's what I was looking for... 3/4 sander ply from home depot. It's the equivalent to the stuff I used from Rona in Canada. Real BB is nice stuff but doesn't come in sheets big enough to build these monsters.

The outer veneer is so thin on this stuff that if you have to sand any of your edges you'll burn through to the softer inner ply layers..

Lots of pl and a kreg jig will make assembly very easy.
Looking forward to following along here.
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post #19 of 260 Old 02-25-2017, 12:36 PM - Thread Starter
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Quote:
Originally Posted by Brazle View Post
This is the plywood I am using for my sub cabinet build (currently underway). It's just called Sanded Plywood at Home Depot. Same price. (aka Arauco)

The main reason I'm using it is because of how much lighter it is than MDF. Feels like half the weight per sheet or something crazy. I could never find density or weight specs anywhere though and i haven't weighed it myself. A second reason is the looks, instead of paint or veneer, I'm just going to put a finish on the wood and I think it will look really good.

Anyway, one warning from my initial cuts - there were numerous voids in the inner layers of the plywood. Most small, but when using the router i had to cut an extra 16" to get past a part with some voids that was a good inch or two in size. Also, some of my straight cuts left small <1 inch voids in some of the edges along inner layers.

I read that it is best to avoid plywood with voids for subwoofer cabinets and that birch is the preferred material ($10 more per sheet). BUT, so far it hasn't been a problem for me, I'm going to keep going with what I have and I don't have any actual reason to think these won't work just fine for our purposes. Just passing on the info.

Note: I spent a good amount of time picking out 3 sheets that looked nice and clean with straight edges etc.
Which pl did you use the premium?

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post #20 of 260 Old 02-25-2017, 12:42 PM
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avoiding the voids without going to BB is tough

you "can" make panels of any size using PL and kregs for edge joining , just be sure to keep it all flat.
I've done that for an internal panel or 2, helps to do that in conjunction with how braces are planned

for me any voids get a goober of PL and I used sander ply

some 3/4" edges get covered/sealed in a thin layer of PL.

and have a box of disposable gloves.

my V2 and V3 seem to be plenty , for now

pics! we love pics!
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post #21 of 260 Old 02-25-2017, 12:54 PM - Thread Starter
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avoiding the voids without going to BB is tough

you "can" make panels of any size using PL and kregs for edge joining , just be sure to keep it all flat.
I've done that for an internal panel or 2, helps to do that in conjunction with how braces are planned

for me any voids get a goober of PL and I used sander ply

some 3/4" edges get covered/sealed in a thin layer of PL.

and have a box of disposable gloves.

my V2 and V3 seem to be plenty , for now

pics! we love pics!
Definitely will be posting a bunch of pics. I should have the wood by tomorrow and am going to start cutting up all the panels. Should be easier by myself than using mdf. Cutting full sheets of mdf was a pain without someone else there.

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post #22 of 260 Old 02-25-2017, 03:00 PM
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I fill voids with a squirt of regular wood glue, then I jam toothpicks in. Once dry trim off the exposed toothpicks. For thin voids you can squeeze the toothpicks with a pair of pliers to thin them down. Wood toothpicks at Walmart were 2 bucks for a big box.
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post #23 of 260 Old 02-25-2017, 03:03 PM
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Subscribing to thread for sure, should be great.
I hadn't seen the construction details until now, should be no problems with that plywood...
The amount of bracing at the mouth is substantial, right up against the driver housing wall.

These monsters are gonna move planets, particularly ones perched atop shoulders...
Lots of pics please..rock on!

Actually, I love tube amps..
I play guitars through them.
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post #24 of 260 Old 02-25-2017, 04:21 PM
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Which pl did you use the premium?

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Actually for my first gluing I used PL 510 Wood. Seemed to work fine, seemed to tack up pretty wick, but took a little longer to fully harden (24hrs-48hrs+, not sure if that is normal for PL Premium too). I glued my two baffles together and they didn't squeeze together perfectly.

After my thread "Which PL?!" and the replies I got, I'll be using the PL3X Premium from here on out. It seems like the preferred adhesive, though I think the 510 would do fine. I used the PL510 on my MDF test box and it worked great.

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post #25 of 260 Old 02-25-2017, 04:32 PM
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I just used some maple ply from home depot (was 50 a sheet) but had very few voids, and harder wood than the sandeply, and of course heavier. Wonder if it would make sense to use harder ply at the high pressure end of the horn?

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post #26 of 260 Old 02-25-2017, 04:58 PM - Thread Starter
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this is a side view of the sanded ply

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post #27 of 260 Old 02-25-2017, 05:04 PM - Thread Starter
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Quote:
Originally Posted by Samps View Post
I fill voids with a squirt of regular wood glue, then I jam toothpicks in. Once dry trim off the exposed toothpicks. For thin voids you can squeeze the toothpicks with a pair of pliers to thin them down. Wood toothpicks at Walmart were 2 bucks for a big box.
Thanks for the tip such a easy idea but I would have never thought of doing that

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post #28 of 260 Old 02-25-2017, 05:10 PM - Thread Starter
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Originally Posted by Brazle View Post
Actually for my first gluing I used PL 510 Wood. Seemed to work fine, seemed to tack up pretty wick, but took a little longer to fully harden (24hrs-48hrs+, not sure if that is normal for PL Premium too). I glued my two baffles together and they didn't squeeze together perfectly.

After my thread "Which PL?!" and the replies I got, I'll be using the PL3X Premium from here on out. It seems like the preferred adhesive, though I think the 510 would do fine. I used the PL510 on my MDF test box and it worked great.
You're the third person that recommend the premium x3. I'm going to pick some up tomorrow. Wondering how many of the large tubes I should get for the 4 boxes

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post #29 of 260 Old 02-25-2017, 05:23 PM
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Jealous. I was going to build 2 but I'm running out of room. I'm already building new boxes for my QSC 2150's which will give me an extra 4 feet (wide) behind my screen. Still deciding if I want to hide both PA460 MBM or 4 SI-18" subs with the speakers. Once the weather cooperates I'll start on my subs. Either 2 Maximus v.3 or Tuba HT.
If I decide not to add seating to my riser, that opens up a lot of real estate for boxes. Not sure I need seating for 8 when its only the kids and I. I may actually add a bar area for the and/or adults to eat while a movie is playing. Leaving the seating area on the main floor. Ughh. decisions, decisions.
I'll be watching your build closely. Today its 22 degree, yesterday 68 lol Crazy arse weather..

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post #30 of 260 Old 02-25-2017, 05:29 PM
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You're the third person that recommend the premium x3. I'm going to pick some up tomorrow. Wondering how many of the large tubes I should get for the 4 boxes

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I seem to go through it faster than I expect. I'd probably start with at least two and unless you're close to the end, always have a new tube ready, I'd hate to run out of adhesive half way through a step.

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